electrical service guidelines for commercial and multi

Electrical Service Guidelines

for Commercial and

Multi-Residential Installations

Revised August, 2020

New Construction ● 458-5870

Fairbanks ● P O Box 71249, Fairbanks AK 99707 ● 452-1151

1-800-770-GVEA (4832) ● www.gvea.com

“Verify Service Entrance Equipment Meets the Following Criteria”

1. Meter Pole Installations:

a. Pole shall be pressure treated and approved.

b. Pole shall be buried to the proper depth.

c. Pole shall be of sufficient height to meet clearance requirements.

d. Meter pole shall be installed plumb.

e. Pole brand (belly button) shall be exposed for inspection.

f. Conduit mast shall be installed plumb.

g. Service equipment shall be mounted on proper brackets.

h. Pole shall be properly guyed or anchored with approved equipment.

i. Ground wire shall be stapled to pole.

j. Meter shall be mounted to face in the direction specified by GVEA.

2. Service shall be de-energized prior to inspection. Energized or back fed services will not be inspected.

3. Service Equipment shall be placed in a location specified by GVEA.

4. Path for service drop shall be 4’-0" wide and material shall be stacked alongside of clearing by the member.

5. The mast on service equipment that is mounted on the eave side of the building:

a. Shall be 2" minimum size RMC or IMC.

b. Shall be extended through the eaves and properly guyed.

c. Height shall not be other than approved.

6. Install GVEA approved service equipment. See GVEA's Engineering Service Department for approved

equipment list.

7. Inspection card issued by GVEA or City permit shall be posted on the job next to the service equipment.

8. Per NEC 230.7, conductors other than service conductors shall not be installed in the same service raceway

as service conductors.

9. Service conductors shall be installed and terminated by member.

10. Split bolt type connectors to splice conductors are not accepted.

11. Conductor insulation shall be XHHW or RHW for conduit installations or USE for direct burial installations is

required.

12. All access to un-metered conductors shall have sealing provisions for stainless wire bail padlock type seal.

13. All overhead service entrance conductors shall be copper.

14. All mounting hardware shall be corrosion resistant.

15. All lugs shall be mounted by means of a machine screw and a factory-provided tapped hole or a bolt with a

lock washer and nut. Sheet metal screws are not an acceptable means of mounting lugs.

16. Maximum of six individual disconnects allowed per service without main disconnect according to NEC 230.71

& 230.72 provided that the service conductors are rated for the maximum total diversified load of the

disconnects.

17. Multi-meter installations shall be properly identified with approved permanent numbers on the service entrance

equipment. If you have more than one meter on your building, see Meter Identification instructions on page 4.

18. For 7-jaw Y-connected services, the neutral in the meter base shall be connected.

19. Grounding and bonding:

a. Conduits and equipment shall be bonded per GVEA bonding details.

b. Undersized grounding/bonding conductors shall not be accepted.

c. Conduit containing grounding electrode conductor shall be bonded at both ends.

d. Per NEC 110.14(A), terminals for more than one conductor shall be marked.

e. Use of split bolt type connectors is not accepted.

f. Ground rod connection shall be exposed for inspection.

20. Grounding electrode system shall be properly installed to meet NEC requirements. Ground rods shall be

driven 6" below grade into undisturbed earth, out from under the eaves of the building and left open for

inspection (See pages 25 and 26 of this booklet). Cover the ground rod hole in winter to prevent it from filling

with snow.

21. Fuses shall be properly sized and installed. If in doubt whether your fuses are correct for your service, call

GVEA's Engineering Services Department.

22. Equipment (main disconnect, branch breakers, etc.) shall be rated for available fault current per NEC 110.9.

PLEASE DOUBLE CHECK THESE PROBLEM AREAS BEFORE CALLING

GVEA FOR YOUR SERVICE ENTRANCE INSPECTION.

TABLE OF CONTENTS

TITLE.........................................................................................................................................................PAGE

INTRODUCTION................................................................................................................................................................ 3

NEW CONSTRUCTION CONNECTION PHONE NUMBER............................................................................................. 3

SUBMITTAL OF LOAD DATA.......................................................................................................................................... 3

DESIGN CRITERIA FOR MEMBER'S DESIGN CONTRACTOR OR ENGINEER........................................................... 3

SPECIAL WAIVERS FOR SERVICES.............................................................................................................................. 3

METERING STANDARDS

LOCATION OF METERS........................................................................................................................................... 4

METER SEALING...................................................................................................................................................... 4

METER IDENTIFICATION......................................................................................................................................... 4

METER EQUIPMENT................................................................................................................................................ 4

METERING - LESS THAN 600 VOLTS..................................................................................................................... 5

METERING - GREATER THAN 600 VOLTS (PRIMARY METERING)......................................................................7

TAMPERING WITH METERS…................................................................................................................................ 7

UNUSUAL CONDITIONS........................................................................................................................................... 7

CABLE LIMITERS............................................................................................................................................................. 7

UNDERGROUND OBSTRUCTIONS................................................................................................................................. 7

UNDERGROUND CABLE MECHANICAL SUPPORT......................................................................................................7

ELECTRIC GENERATORS

OPTIONAL STANDBY SYSTEMS............................................................................................................................. 7

GENERATION, SMALL POWER PRODUCTION, & SNAP....................................................................................... 7

PLACEMENT OF EQUIPMENT NEAR ELECTRICAL POWER LINES AND CONDUCTORS........................................ 7

PLACEMENT OF ELECTRICAL EQUIPMENT NEAR NATURAL & LIQUID PETROLEUM GAS EQUIPMENT............7

ILLUSTRATIONS

TYPICAL PERMANENT OVERHEAD SERVICE, TYPE A (NOT TO EXCEED 300 AMPS)............................................8

TYPICAL PERMANENT OVERHEAD SERVICE, TYPE B (NOT TO EXCEED 300 AMPS).…………............................ 9

TYPICAL PERMANENT UNDERGROUND SERVICE (OVER 200 AMPS).………….………….……...............................10

TYPICAL PERMANENT OVERHEAD SERVICE (OVER 200 AMPS)..............................................................................11

UNDERGROUND SERVICE (NOT TO EXCEED 300 AMPS)...........................................................................................12

UNDERGROUND SERVICE ON PLYWOOD BACKBOARD........................................................................................... 13

TYPICAL POLE MOUNTED SERVICE (NOT TO EXCEED 300 AMPS)..........................................................................14

300 AMP SINGLE-PHASE SELF-CONTAINED METER.................................................................................................. 15

TEMPORARY CONSTRUCTION SERVICE (CT SERVICE OVER 200 AMPS)...............................................................16

POLE MOUNTED RISER DETAILS FOR SECONDARY URD RISER SERVICE............................................................17

STAND-OFF BRACKET DETAILS FOR SECONDARY URD RISER SERVICE..............................................................18

GUYING TO A STRUCTURE.............................................................................................................................................19

GUYING A POLE............................................................................................................................................................... 20

SHUNT TRIP DETAILS......................................................................................................................................................21

TYPICAL MULTIPLE METERED SERVICE ENTRANCE

SIX UNITS OR LESS..................................................................................................................................................22

MORE THAN SIX UNITS............................................................................................................................................23

© 2020 Golden Valley Electric Association, Inc. Page 1

TABLE OF CONTENTS

TITLE..........................................................................................................................................................PAGE

TYPICAL CT METERED SERVICE (1200 AMPS AND BELOW).....................................................................................24

GROUNDING DETAILS

CT METERED SERVICE WITH MAIN DISCONNECT...............................................................................................25

METER LOCATED ON BUILDING BEING SERVED................................................................................................. 26

POLE OR POST MOUNTED METER........................................................................................................................ 27

MULTIPLE METERED SERVICE WITHOUT MAIN DISCONNECT (W/ ALTERNATE)............................................ 28

NOTES FOR MULTIPLE METERED SERVICE DETAILS......................................................................................... 29

METERING

METER SOCKET FOR CURRENT TRANSFORMER AND CONNECTION DIAGRAM............................................ 30

SELF-CONTAINED METER SOCKETS (100 to 300 AMPS)..................................................................................... 31

CONDUIT DETAILS

FOR TRANSFORMER PADS 14'-0" FROM POLE.................................................................................................... 32

FOR TRANSFORMER PADS MORE THAN 14 '-0" FROM POLE.............................................................................33

TRANSFORMER PAD DETAILS

SINGLE-PHASE TRANSFORMER BOX PAD (FOR TRANSFORMERS 15-167kVA).............................................. 34

SECONDARY PEDESTAL DETAILS......................................................................................................................... 35

THREE-PHASE TRANSFORMER VAULT.................................................................................................................36

THREE-PHASE TRANSFORMER VAULT NOTES................................................................................................... 37

PRIMARY METERING....................................................................................................................................................... 38

TRANSFORMER IMPEDANCE VALUES......................................................................................................................... 39

LOAD AND PRINT INFORMATION REQUIRED BY GVEA............................................................................................. 40

LOAD DATA SUBMISSION FORM “ELECTRICAL LOAD DATA AND ELECTRICAL PRINT”..................................... 41

TYPICAL ELECTRIC SERVICE ONE-LINE DRAWING

SELF-CONTAINED.................................................................................................................................................... 42

CT............................................................................................................................................................................... 43

MULTIPLE METER.....................................................................................................................................................44

A link to the PDF version of this document can be found on the GVEA web page at:

http://www.gvea.com/resources/connect/newconstruction under Construction Guides.


ELECTRICAL SERVICE REQUIREMENTS FOR COMMERCIAL

AND MULTI-RESIDENTIAL INSTALLATIONS

INTRODUCTION:

This manual is intended to familiarize the member's contractor and/or

engineer with the requirements for commercial and multi-residential

services. The information in this booklet provides general guidelines for

the installation of service equipment to meet the requirements of GVEA.It is the owner's responsibility to make sure that the service is also

installed to meet all applicable city, borough, and State of Alaska codes,

as well as the National Electrical Code (NEC) and National Electrical

Safety Code (NESC). State law requires that an applicable Electrical

Administrator Licensee supervise work related to commercial and

multi-residential electrical service installations. This booklet

references the current adopted edition of the NEC & NESC.

NEW CONSTRUCTION CONNECTION PHONE NUMBER: 458-5870

Members or Contractors should call GVEA's New Construction Services

office to notify GVEA that they are planning to construct a new service

or for information.

SUBMITTAL OF LOAD DATA:

Commercial loads are often expensive to serve and involve complex

electrical requirements. Golden Valley requires detailed electrical load

data and electrical construction plans prepared by an Alaska State

Registered Electrical Engineer. For services 200A and below we may

accept plans prepared by an Alaska State Licensed Electrical

Contractor. Pre-approval is required unless a PE stamp is provided.

Golden Valley's Engineering Services Department shall review the

submitted load data information for the design and construction of

facilities and utility equipment necessary to accommodate this new

load. A member shall apply for service before any submittal review or

engineering services can take place.

In order to be approved for a connection to Golden Valley's system, the

member's actual installation shall correspond to the reviewed

construction plans and the submitted load data. Changes made to the

submitted design or load data after submission but before

connection must be approved by Golden Valley's Engineering

Services Department. An “Electrical Load Data and Electrical

Print” form is on page 40 of this booklet.

Information and details for services requiring Primary Metering

Equipment (PME) shall also be included in the load data.

DESIGN CRITERIA FOR MEMBER'S DESIGN CONTRACTOR OR

ENGINEER:

The Engineering Services Department at GVEA may be consulted

when the member's design contractor or engineer requires additional

information regarding electrical service requirements.1. All three-phase services shall be four-wire. Three-phase

three-wire services are not allowed.

2. When sizing service transformers and service entrance

conductors, the voltage drop from the distribution line (high side

of the transformer) to the point of service should not exceed

3.33% at peak load.

3. Information about the available fault current from GVEA's system

may be obtained by contacting the Engineering Services

Department. Typical distribution transformer impedance values

are shown on page 38 of this booklet for use in determining short

circuit fault currents. GVEA assumes an infinite bus on the high

side of the transformer for calculating available fault currents for

service applications.

4. All service overcurrent devices installed on GVEA's system shall

have a minimum interrupting rating of 10,000 Amps. The member

shall demonstrate that any overcurrent device used is able to

interrupt the available fault current when it exceeds 10,000 Amps

as per NEC 110.9. Series rated breaker systems shall be

identified as such with markings on the equipment in which it is

contained.

5. Current limiting fuses are an acceptable means to reduce the

available fault current.

6. Current Transformers (CT's) and test switches shall be supplied

by GVEA. CT's shall be installed by the member's Electrical

Contractor and the test switches shall be installed by GVEA.

7. Where the member requires a degree of voltage regulation

greater than the characteristics of the electrical service normally

furnished by GVEA, the member shall be responsible for

obtaining, installing and maintaining the required voltage

regulating equipment.

8. The grounded service conductor may be permitted to be reduced

in size, compared to the phase conductors, under certain

conditions allowed by NEC 220.61. Before any reduced size

grounded service conductor is installed, calculations justifying the

size reduction shall be reviewed and approved by GVEA's

Engineering Services Department.

9. The rules and article references stated in NEC article 230.79

"Rating of Service Disconnecting Means" shall be used to size

service entrance equipment breakers. The rating of the main

breaker shall meet current NEC requirements. The service

entrance equipment in which the main breaker is mounted must

be rated for 100 Amps minimum load and 10,000 Amps minimum

short circuit current. It is the member's responsibility to recalculate

the load when any changes are made to the member's

electrical system and apply for an appropriately sized service.

10.GVEA recommends the use of copper conductors, especially for

underground services. If aluminum conductor is used it shall have

an ampacity equal to or greater than that of the copper conductor

called out in this book. Copper pigtails shall be used

when terminating aluminum conductor in service equipment

(NSi PT series or comparable).

11.Service equipment shall be marked with the maximum

available fault current and the date of calculation, according to

NEC 110.24 requirements.

12.Seal conduit interior space around conductors at first access point

when transitioning between warm and cold areas and from below

to above grade.

13.Conduit runs shall have one set of lateral service conductors per

conduit.

SPECIAL WAIVERS FOR SERVICES:

Any exception to the requirements or construction detail drawings in

this booklet shall be approved in writing by GVEA prior to ordering and

installation of equipment. Requests should be submitted to

GVEA's New Construction Services Department. Methods of

electrical equipment installation other than that outlined in this

booklet are allowed only with written approval prior to installation.


METERING STANDARDS:

The following are the minimum requirements or standards for member

metering installations. Metering and service entrance equipment shall

be approved by GVEA prior to installation.

LOCATION OF METERS

Prior to wiring a building or performing any electrical construction for a

new service, the member shall request approval from GVEA for the

location of member's service equipment, including meters.

1. Service equipment shall be located as specified by GVEA's New

Construction Services Department. Alternate service locations

shall be approved by GVEA. Where building occupancy requires

more than one meter, the meters shall be grouped at one readily

accessible location. GVEA approval for other arrangements may

be obtained when capacity requirements make multiple services

desirable and are permitted by the NEC.

2. The meter shall be level, plumb and located outdoors on

the member's structure (building, meter pole, or pedestal). The

meter shall be firmly supported and be in locations free from

vibration, mechanical damage, accumulating ice, or falling ice.The meter shall be accessible for reading, testing, and

replacement.

3. The meter may be installed indoors only with prior approval of

GVEA and only when conditions prohibit outdoor placement.Such meters shall be located as specified by GVEA.

4. GVEA does not permit the installation of member's meter socket

on GVEA facilities, such as distribution transformer enclosures,wood poles, or pad-mount transformers. Meters are not allowed

on mobile structures such as trailers, houseboats, barges,

cranes, skid- mounted electrical generators, dredges, draglines,or mobile pumping equipment, etc.

5. For single installations, the horizontal center line of the meter

shall be between 5'-0” and 6'-0” above the finished grade or

floor immediately in front of the meter. For multiple meter

installations, the horizontal center line of the highest

disconnecting means, circuit breaker, switch, etc., shall be a

maximum of 6'-7” above finished grade or finished floor. The

bottom of the service entrance equipment shall not be less

than 3'-0” above finished grade.

6. Minimum unobstructed wall space for a single meter

is 11”w x 1'-2”h. Installation requiring manual bypass shall

require a 1'-3”w x 2'-1”h wall space. NEC 110.26 should

be reviewed for working space requirements around the

meter.

7. The distance between either vertical edges of a meter enclosure

shall not be less than 1-1/2” from a wall or

obstruction. Additional wall space shall be required for current

transformer services. Also, space requirements increase when

more than one meter is used.

8. If an existing meter has become inaccessible for inspection,

reading, or testing; the member shall, at their expense,

extend wiring to a new and approved meter location.

9. GVEA is not obligated to provide service to a location not

approved by GVEA. A member who installs service entrance

equipment without prior GVEA approval may be required, at the

member's expense, to relocate the service equipment to an

approved location.

10.If roof overhang is less than 2'-0", provide suitable protection for

meter from ice and snow. Protection by overhanging roof

is preferred. An acceptable alternative is a protective hood made

of 18 gauge (minimum) galvanized steel, fastened at the roof

edge or wall, and extending out a minimum of 12" off the front of

the meter enclosure. Installation must meet all relevant code

requirements.

METER SEALING

Meters shall be secured with GVEA supplied screw type

meter retaining rings. 300 Amp meter enclosures must be the

ringless type. Other ringless type meter enclosures may be

approved by GVEA. All cabinets and gutters containing

un-metered wires shall be arranged to enable sealing. This

includes current transformer (CT) cabinets or CT compartments in

switch gear. For example, where fused disconnects are ahead

of multiple meter base installations, the member or electrical

contractor shall provide an operable main switch interlocked with

the fuse access compartment ensuring that the fuses remain

accessible to the member. Sealing devices shall be of the type

that accepts GVEA's standard stainless wire, bail padlock-type

seal. CT circuits running between the CT enclosure and the meter

base shall be enclosed in conduit in all unsealed areas; conduit

elbows with access fittings or covers, unions and junction boxes

shall not be permitted in the CT circuit conduit. Conduits used for

CT circuits shall be of the threaded type. Compression

fittings shall not be accepted.

METER IDENTIFICATION

If more than one meter is installed at one location, all sockets and

entrance equipment shall be clearly and permanently marked

using 1” to 2” high letters to designate the particular apartment or

office served. Rivets or screw type fasteners are preferred for

label mounting. If meters are marked incorrectly, the member

shall be responsible for all costs incurred by GVEA in correcting

the meter identification and chargeable electrical usage.

NOTE: Ink labeling shall not be considered permanent.

METER EQUIPMENT

1. Sockets

Acceptable meter sockets shall be manufactured in

accordance with National Electrical Manufacturing Association

(NEMA) ANSI Standard C12.7-2005, labeled by a Certified

Testing Laboratory and equipped with terminals and meter jaws.

* See Pages 30 and 31. ** Shall be approved by GVEA.*** 300A service is single phase only.

TYPE OF

SERVICE

SOCKET

TYPE

NON-CT SERVICE

(100-300 Amps)

CT SERVICE

(ABOVE 200 AMPS)

TERMINALS FIGURE* TERMINALS FIGURE*

120/240V,

1Ø, 3W***

S-BASE 44,6***

6 1

240/480V,

1Ø, 3W**

S-BASE 4 4 6 1

120/208V,

3W**

S-BASE 5 5 --- ---

120/208V,

3Ø, 4W

S-BASE 7 7 13 3

277/480V,

3Ø, 4W

S-BASE 7 7 13 3

120/240V,

3Ø, 4W

S-BASE 7 7 13 2

240/480V,

3Ø, 4W

S-BASE 7 7 13 2


The sockets shall have an ampacity rating equal to, or greater than,

any conducting portion of the service entrance equipment including the

entrance panel and the service conductors. This requirement applies to

single-phase, three-phase, and self contained meter bases that are

300 Amps and below. The minimum socket box size for underground

service is 7"w x 1'-2"h for 100 Amp services and 11"w x 1'-2"h for

services above 100 Amps. The minimum socket box size for overhead

service is 7"w x 1'-2"h for 100 Amps and 8"w x 1'-2"h for services

above 100 Amps. Pages 30 and 31 show the type of socket that should

be used for each specific type of service. All CT metering shall require

a test switch in the meter base. GVEA shall supply and install the test

switch.

2. Socket Installation

Meter sockets shall be plumb and securely fastened to the

structure. Unused threaded socket openings, or any other type of

opening not used shall be closed with approved plugs that are

locked in place from the inside of the meter socket. Install sealing

lock nuts or hubs on all conduit penetrations of outdoor cabinets.

All conductors shall be securely fastened to their respective

terminals and shall be arranged in a manner which shall not

interfere with the installation of the meter. Running conductors

behind meter socket is permitted if box is designed for it. Where

the service contains a grounded neutral conductor, the member

shall provide the ground connection between the neutral and the

socket.

3. Service Conductor Identification and Connections

As per NEC 110.15, when a three-phase, four-wire service is

supplied from a delta-connected secondary with the mid point of

one phase grounded to supply lighting and similar loads, the

phase conductor in the service entrance having the higher voltage

to ground (high leg or power leg) shall be identified by the color

orange and shall be located on the RIGHT HAND lug of the meter

base. There are NO EXCEPTIONS! If the neutral conductor is

insulated, it shall be identified as per NEC 200.6.

4. Service Entrance Grounding

Grounding shall comply with GVEA requirements and the NEC.

Refer to the appropriate Grounding Detail on pages 25 through 29.

5. Final Service Connections

GVEA shall make the service connection only after approval of the

inspection authorities. Whenever possible, these authorities

should be given adequate notice regarding the wiring plans to

avoid any unnecessary delay. Energized or back fed services will

not be inspected. The new service must be de-energized prior to

inspection. No meter shall be installed until the member has

submitted a new service application, the member has completed

all requirements for that location, and a Service Entrance Electrical

Inspection card is posted at the service. If the installation is within

the Fairbanks City limits, a city inspection and permit is required.

METERING – LESS THAN 600 VOLTS

1. Socket Installation

A. Service Point

The service point, unless otherwise specified, is the point of

connection between GVEA’s circuit facilities and the member’s

circuit wiring. Typically this would be at the service mast head

on overhead services and at the secondary lugs on padmount

or overhead transformers for underground services.

B. Location of Service Overcurrent Protection

Socket type metering shall be installed on the line side of the

overcurrent protective devices in the service entrance, except

where code requirements indicate otherwise.

C. Switchboard Assemblies

In the case of large loads where the member’s establishment is

open and accessible to GVEA employees during normal

business hours, the metering may, only with prior written

approval by GVEA, be installed on the member’s switchboard.

D. Residential

Meters shall not be placed in any unsafe location, such as

along stairways and above window wells. Carport, porch, or

patio areas shall be avoided due to possible future enclosure

of such area, limiting access to meter reading or testing by

GVEA.

2. Self Contained Metering

A. Ampacity

The member shall provide a self-contained meter socket

installation on each new or remodeled service entrance that

has an ampacity of 200 Amps or less (unless using the optional

single-phase 300A service).

B. Meter Bases

Meter bases shall use the standard S-type socket base.

C. Meter Bypass Provision

Manual bypass provisions are required on 300 Amp meter

bases and are optional on 200 Amp, three-phase, seven jaw

meter bases. Unless specifically approved by GVEA prior to

installation, meter bypass provisions are not allowed on any

other types of meter base installations. Automatic bypasses

shall not be used in any installation.

3. Current Transformer Metering

A. Ampacity

CT’s are required when the service entrance capacity is

greater than 200 Amps (Unless using the optional

single-phase 300A service.). GVEA’s New Construction section

shall be consulted to determine a mutually satisfactory space

and location for the CT’s. For larger service ampacities switch

gear with provisions for built in metering equipment should be

considered.

Where the meter enclosure is located remote from the CT

enclosure, the conduit length between the CT’s and the meter

enclosure shall not exceed 50'-0". No other conductors shall be

in the conduit containing the CT leads.

B. Cabinets – Dimensions and Installations

The dimensions of a CT cabinet, separate from the switchgear

assembly, shall depend on the size and number of

CT’s, service entrance conductors and the location of entrance

and exit conduits into and out of the CT cabinet. The minimum

depth of the cabinet shall be 9” for single-phase and 11” for

three-phase. See page 23 for dimensions.

CT cabinets shall be provided with means to accommodate

GVEA seals (stainless wire bail padlock type). They shall not

contain facilities other than the service conductors and GVEA’s

equipment and shall not be used for the addition of branch

circuits.


C. Current Transformers – Installation and Wiring

GVEA shall supply the bar-type CT’s for installation by the

member’s electrical contractor per sizing based on the submitted

load data. CT’s shall be mounted on manufacturer’s CT mounting

bracket, unless the design of the cabinet has brackets already

installed and labeled with short circuit fault current rating. The

number of parallel runs connected to bar-type CT’s should be

limited to 4. GVEA shall wire the secondary terminals before the

CT’s are covered and sealed. Mounting bolts shall have both

ends accessible for future removal. Provisions shall be made so

that the CT and meter sections are readily accessible and can be

sealed by GVEA using stainless wire bail padlock type seals.

The CT cabinet, mounting rack, conduit and conduit fittings

between the CT location and the meter enclosure shall be located

on the member’s structure and shall be furnished and installed by

the member. The conduit shall be not less than 1” in diameter and

shall include a pulling line. The conduit length shall not exceed

50'-0" in length. All meter conductor conduits shall be corrosion

resistant protected intermediate metal conduit (IMC) or rigid metal

conduit (RMC). Hazardous or non-standard installation locations

may require a higher standard of corrosion resistant materials.

The conduit connecting the meter enclosure socket and CT

enclosure shall be installed by the member’s electrical contractor

and run direct without access points such as junction boxes,

unions or elbows with access fittings or covers. Conduits used for

CT circuits shall be of the threaded type. Compression fittings

shall not be accepted. At no time shall branch circuits, or

conduit not related to metering be allowed in the enclosures, nor

shall other compartments in the switch gear be used to carry

metering wire without being in a conduit. Metering wire shall not

be allowed in the service entrance conduit. Separate conduits

shall be used.

D. Current Transformer Bypass Provisions

Bypass provisions for this type of installation shall be

accomplished by a test switch furnished and installed by GVEA.

Standard test switches used by GVEA are:

Single-phase (7 pole) Meter Devices #: 107-1280

Three-phase (10 pole) Meter Devices #: 110-1423

GVEA shall install all secondary wiring between CT’s, test

switches and meters. GVEA shall supply the CT’s, test

switches, and meters.

E. Switchboard Assembly Installations

CT’s may be installed in the member’s switchboard

assembly. CT’s shall be mounted behind a hinged metal

panel. Mounting bolts shall be avoided where both ends of each

bolt are not accessible for future removal. Provision shall be

made so that the CT’s and meter sections are readily accessible

and can be sealed and secured by GVEA. When CT’s are to be

factory installed in the switchboard assembly, the member shall

supply CT’s and submit CT technical data to GVEA for review of

accuracy classification, size, thermal current rating factor, and

burden. GVEA requires an ANSI accuracy rating of 0.3% at a

burden of 0.5 Ohms at 100% rated current. Technical data for

switchgear assemblies with factory installed CT’s shall be

submitted to GVEA’s Engineering Services Department for

approval.

F. Service Disconnect Provisions

Disconnects (breaker or fused) installed for CT metering shall

have padlocking provisions to allow locking of the disconnecting

means in the off position

4. Remote Trip Disconnect

When the main service disconnect is to be installed inside a building,

or within a stand-alone enclosed structure, or otherwise remote from

the meter location, the following guidelines shall be followed to

insure that the service and any emergency power sources may be

disconnected from outside the building. See page 22 for a typical

detail drawing.

A. Push Button Operator

A push button operator shall be provided to serve as the remote

disconnect device. The button shall be suitable for the

environment in which it is installed. For example, if it is located

outside, it shall be weatherproof. If the button is located inside an

enclosure, the enclosure shall be weatherproof. See Shunt Trip

Details, shown on page 22. A service disconnect plaque shall be

provided by the member and shall be fastened in place beneath

the button. The plaque shall be permanently attached to the

structure. If the button is placed inside an enclosure the plaque

shall be mounted on the outside of the enclosure. The plaque

shall be approximately 2” x 5” (H x W), metal or plastic, with

engraved 1/4” lettering which reads:

REMOTE POWER

SERVICE DISCONNECT

B. Location

A push button operator shall be grouped together with the meter

on the outside of the building to be served, mounted at a height

of 5'-0" to 6'-0" feet above final grade. The push button

operator must be in a location that is readily accessible to

fire department personnel.

C. Drawings

Detailed drawings showing the physical locations of the push

button operator and meter shall be submitted to GVEA’s New

Construction Services Department for review.

D. Suggested Material List

The following list of materials is supplied to assist with procuring

equipment for the remote trip station. All of the materials listed

should be available from local suppliers.

1. Push button operator unit – Square D type K, or

similar, push button operator with contact block and

mushroom button.

2. Associated wiring – as required for complete installation.

3. Plaque – available from a variety of local trophy vendors.

4. Enclosure (if necessary) suitable for the environment in

which it is to be mounted.

E. Source of Power for Shunt Trip Circuits

The source of power for a shunt trip circuit shall be the load side

of the main disconnecting means. It shall not be permitted to be

supplied from the load side of any branch circuit breaker nor shall

it be permitted to be supplied from a remote panel or other power

source.


METERING – GREATER THAN 600 VOLTS (PRIMARY

METERING)

High voltage instrument transformers shall be required for members

taking service at primary voltage under provisions of GVEA’s

Tariff. Consult GVEA before construction begins to establish a

mutually satisfactory location for the service point, and to clarify

metering installation details. The member shall submit their

preliminary plans for review prior to the purchase of equipment and

the start of construction. Drawings required for review shall include:

1. A plot plan showing desired point of service.

2. Service configuration details (overhead or underground).

3. Service entrance equipment and structures.

4. Arrangement of service substation equipment.

5. One-line diagram.

6. Size and impedance of transformer.

All facilities including the “member's pole” and beyond shall be

furnished, installed, operated, maintained and owned by the

member. Equipment installation shall be in accordance with the

requirements of NEC 230.200 and GVEA.

All facilities prior to the “Member's pole” shall be

furnished, installed, operated, and owned by GVEA. This includes

a 30'-0” span of primary line from the existing primary pole line, a

new pole that contains the primary metering equipment, and the

span of conductor and associated hardware between the “Point of

Service” and the “Member's Pole”.

TAMPERING WITH METERS

Tampering with meters is prohibited by GVEA and is a civil offense

under Alaska Law (AS 42.20.030). In addition to statutory

penalties, a fee shall be charged to anyone who breaks a seal

without authorization or otherwise tampers with GVEA’s facilities. In

flagrant cases, electric utility service shall be

discontinued. Authorization to break a meter seal shall be given by

GVEA’s Operations Department in appropriate cases.

CABLE LIMITERS:

Cable limiters may be used to protect against short circuit currents

in underground service conductors under 600V. If used, cable

limiters shall be of the bolted terminal to bolted terminal type. Tube

or compression rod type cable limiters are not acceptable. The

transformer connections are to be insulated for 600 volts and shall

provide a dead front installation. Where cable limiters are installed

in vaults, adequate space for this equipment and cable terminations

shall be provided.

UNDERGROUND OBSTRUCTIONS:

Location of any customer facilities approved by GVEA does not

take into consideration underground obstructions; it is the owner’s

responsibility to call other utilities for underground locates and to

identify any underground obstructions prior to placing any new

equipment.

UNDERGROUND CABLE MECHANICAL SUPPORT:

Installations using large conductors or using multiple runs of

conductors may produce excessive forces which could cause

damage to the transformer bushing. Installations such as this may

be required to either mechanically support the conductors or to

leave enough conductor slack to prevent damage. Consult GVEA’s

New Construction Services Department prior to installation for a

determination.

ELECTRIC GENERATORS:

OPTIONAL STANDBY SYSTEMS

No member shall, without prior GVEA approval, permanently

connect any electric generator to wiring which is intended to be

energized at any time from GVEA’s system. Proper sectionalizing

and protective equipment shall be installed in conformance with

applicable Federal, State, and Municipal codes and GVEA

requirements.

GVEA offers a publication called “Standby Electric Generators for

Alaskan Residences” which contains advice and installation

illustrations. This publication is available at GVEA’s Member Service

Department and online at:

http://gvea.com/images/pdf/generatorbook.pdf

GVEA recommends that any transfer switch, for the use of

transferring load from utility supply wiring to a member owned

generator, be installed by a licensed electrician in accordance with

the appropriate articles of NEC sections 702 & 705.

COGENERATION, SMALL POWER PRODUCTION, & SNAP

A member may operate an electric generator in parallel with GVEA

provided they have executed a Cogeneration and Small Power

Production Interconnection Agreement with GVEA. Copies of the

Cogeneration and Small Power Production Interconnection

Standards and Procedures, Application for Cogeneration and Small

Power Production Interconnection, and Interconnection Agreement

forms are available upon request from GVEA’s New Construction

Services Department.

PLACEMENT OF EQUIPMENT NEAR ELECTRICAL POWER

LINES AND CONDUCTORS:

GVEA prefers horizontal clearances from overhead conductors to

any equipment or object to be not less than 15'-0".

Alaska State Statute Title 18, Chapter 60, Section 670 (18.60.670)

requires a minimum distance of 10'-0" from power lines or overhead

conductors to equipment or machinery. See this statute for full

details. Wind displacement of conductors should be considered.

Note that this clearance is greater than required by the NESC.

PLACEMENT OF ELECTRICAL EQUIPMENT NEAR NATURAL &

LIQUID PETROLEUM GAS EQUIPMENT:

Electrical equipment (i.e.: service disconnect, electrical meters,

receptacles, etc.) shall be installed not less than 5'-0" from any LPG

tank installation and related regulators, etc. or NG meter and

regulators. If the gas equipment is installed less than 5'-0" to the

electrical equipment, then the electrical equipment shall meet the

requirements of Article 500 and 501 of the NEC. See NEC 230.70(A)

(4) amendment by the City of Fairbanks.

UNUSUAL CONDITIONS

The above standards are a statement of minimum requirements for

most member metering installations. Standards are necessarily

subject to additions and changes as new developments and

progress may dictate. In doubtful or unusual instances, special

consideration will be necessary. GVEA shall be consulted as to any

conditions which may not be set forth herein.


Typical Permanent Overhead Service, Type A

(Not To Exceed 300 Amps)

1. In addition to the requirements of NEC 230.9, service drop

conductors shall be a minimum of 3'-0" from any door, opening

window, gable vent, or other building opening. The service drop

conductors may be less than 3'-0" when installed above a gable

vent or non-opening window per the Exception to NEC230.9(A).

2. All service entrance masts that extend above the roof line shall be

a minimum 2" rigid metal conduit (RMC) or intermediate metal

conduit (IMC) and shall be guyed using minimum 1/8" aircraft

cable and approved clamp. See Roof Guy Detail on page 19.

3. If roof overhang is less than 2'-0", provide suitable protection for

meter from ice and snow. Protection by overhanging roof is

preferred. An acceptable alternative is a protective hood made of

18 gauge (minimum) galvanized steel, fastened at the roof edge

or wall, and extending out a minimum of 12" off the front of the

meter enclosure and 6" on each side of the service equipment.

Installation must meet all relevant code requirements.

4. The use of split-bolts is not allowed.

5. Couplings in the conduit shall be below roof line.

6. Telephone drop may not be attached to mast. See NEC 230.28.

7. Members shall provide and maintain a minimum 4'-0" wide

clearing between the service entrance and the GVEA pole.

8. Utility service drop is limited to a maximum 150'-0" span.

Messenger cable is furnished by GVEA.

9. See the Fairbanks City NEC Amendments for additional

requirements for service installations in the Fairbanks City Limits.

10. Conductor insulation shall be type XHHW or RHW.

11. See NEC 230.24 for required clearances over roof. If local city

requirements call for vertical clearance of service drop conductors

to be greater than 3'-0" or a flat roof is classified as accessible,

then the mast assembly and guying will be designed by a qualified

engineer. Mast designs shall be submitted to the GVEA's

Engineering Services Department and the City of Fairbanks

Electrical Inspector for review prior to installation.

12. If the grounding electrode conductor is exposed to physical

damage it shall be run in conduit securely fastened to the

structure. See NEC 250.64(B).

13. Self-contained 300 Amp service is single-phase only. See page

15 for details.

14. Local governing bodies may require specific clearances above

that shown depending on the location of the service drop

conductors. If applicable, specific required service drop clearances

may require longer pole lengths. Contact GVEA's Engineering

Services department for a determination prior to any installation.

NOTES: See pages 3-7 for general requirements

LEAVE 1'-6" TAIL -SEE WIRE

SIZE TABLE & NOTES 9 & 10

UTILITY SERVICE DROP

-SEE NOTES 7, 8, & 14

SEE NOTE 5

SEALING HUB

LEAVE GROUND ROD

CONNECTION UNCOVERED

FOR INSPECTION

GROUNDING ELECTRODE SYSTEM -SEE PAGE 26

BARE COPPER GROUNDING ELECTRODE CONDUCTOR

SECURED TO STRUCTURE -SEE TABLE BELOW

COPPER CLAD STAPLE EVERY 6" -SEE NOTE 12

RAINTIGHT SERVICE ENTRANCE EQUIPMENT

CONDUIT STRAP

ROOF FLASHING AND SEAL

NO JOINTS ALLOWED -SEE NOTE 5

MAST CLAMP FOR SERVICE DROP SUPPLIED BY GVEA

MAST CLAMP FOR ROOF GUYING SUPPLIED BY MEMBER

SEE ROOF GUYING DETAIL PAGE 19

GUY CABLE

CROSBY CLAMP

GALVANIZED THIMBLE EYEBOLT

14'-0" MIN.

3'-0" MIN.

SEE PAGE 19

FOR MAX.

1'-6" MIN.

SEE NOTE 11

6"

5'-0" MIN.

6'-0" MAX.

1'-6"

MIN.

REVISED 03/2020

FINAL GRADE

WIRE/CONDUIT SIZE TABLE

WIRE SHALL BE COPPER

SERVICE

SIZE

MINIMUM

WIRE SIZE

(XHHW OR

RHW)

MINIMUM

CONDUIT

SIZE (RMC

OR IMC)

MINIMUM

GROUNDING

ELECTRODE

CONDUCTOR

SIZE

MINIMUM

EQUIPMENT

GROUNDING

CONDUCTOR

SIZE

100 Amp

200 Amp

300 Amp

300 kcmil

Copper

#3/0

Copper

#2

Copper

1 1/4"

See note 2

2"

2"

#4

Copper

#4

Copper

#2

Copper

#4

Copper

#6

Copper

#8

Copper

FOR A METER BASE LOCATED UNDER RAFTER TAILS, RISER MUST

EXTEND ABOVE ROOFLINE. SEE NOTES 1 & 2.

1'-0"

SEE NOTE 3


Typical Permanent Overhead Service, Type B

(Not To Exceed 300 Amps)

1. In addition to the requirements of NEC 230.9, service

drop conductors shall be a minimum of 3'-0" from any

door, opening window, gable vent, or other building

opening. The service drop conductors may be less than

3'-0" when installed above a gable vent or non-opening

window per the Exception to NEC230.9(A).


3. Telephone drop shall be more than 1'-0" (vertical

clearance) below power cable at all points. See NESC

235C1, Exception 3.

4. Members shall provide and maintain a minimum 4'-0"

wide clearing between the service entrance and the

GVEA pole.

5. Utility service drop is limited to a maximum 150'-0" span.

Messenger cable is furnished by GVEA.


requirements for service installations in the Fairbanks

City Limits.


8. If the grounding electrode conductor is exposed to

physical damage it shall be run in conduit securely

fastened to the structure. See NEC 250.64(B).

9. Self-contained 300 Amp service is single-phase only.

See page 15 for details.

GALVANIZED OVAL EYEBOLT 5/8" MIN.

-SEE NOTES 4 & 5

3'-0"

MIN.


SIZE TABLE & NOTES 6 & 7

CONDUIT STRAP

SEALING HUB

RAINTIGHT SERVICE ENTRANCE

EQUIPMENT

BARE GROUNDING ELECTRODE

CONDUCTOR SECURED TO

STRUCTURE -SEE TABLE BELOW

COPPER CLAD STAPLE EVERY 6"

-SEE NOTE 8

GROUND ROD SHALL BE

PLACED A MINIMUM OF 1'-6"

FROM STRUCTURE

LEAVE GROUND ROD CONNECTION

UNCOVERED FOR INSPECTION

GROUNDING ELECTRODE SYSTEM

-SEE PAGE 26

5'-0" MIN.

6'-0" MAX.

14'-0" MIN.

2'-0" MAX.

6"

REVISED 03/2020

FINAL GRADE



SERVICE

SIZE

MINIMUM

WIRE SIZE

(XHHW OR

RHW)

MINIMUM

CONDUIT

SIZE (RMC

OR IMC)

MINIMUM

GROUNDING

ELECTRODE

CONDUCTOR

SIZE

MINIMUM

EQUIPMENT

GROUNDING

CONDUCTOR

SIZE

100 Amp

200 Amp

300 Amp

300 kcmil

Copper

#3/0

Copper

#2

Copper

1 1/4"

See note 2

2"

2"

#2

Copper

#4

Copper

#4

Copper

#8

Copper

#6

Copper

#4

Copper



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Typical Permanent Underground Service

(Over 200 Amps)

GROUNDING ELECTRODE

CONDUCTOR

-SEE NOTES 4 & 5

SEE NOTE 3

GROUND ROD SHALL BE

PLACED A MINIMUM OF 1'-6"

FROM STRUCTURE

SERVICE EQUIPMENT WITH MAIN

DISCONNECT, CT AND METER

ENCLOSURE -SEE PAGE 25

5'-0" MIN.

6'-0" MAX.

1. It is highly recommended that all conductors

or cables under drivable areas be placed in

conduit. 10'-0" minimum distance from meter

to transformer.


3. See the Fairbanks City NEC Amendments for

additional requirements for service

installations in the Fairbanks City Limits.

4. If the grounding electrode conductor is

exposed to physical damage it shall be run in

conduit securely fastened to the structure.

See NEC 250.64(B).

5. Grounding electrode conductors sized per

NEC 250.66 with minimum size to be #4 Cu

in accordance with GVEA requirements. For

specific service entrance, see approved

GVEA load data for minimum permissible

grounding electrode conductor size. See note

18 on page 25 for another grounding

electrode bonding jumper connection option.

Grounding conductors shall be continuous as

per NEC 250.64(C) and protection from

physical damage as per NEC 250.64(B).

6. Optional terminal bus can be added to

connect bonding jumpers from multiple

grounding electrodes. Optional terminal bus

will be effectively bonded to enclosure. A

grounding electrode conductor will connect

the optional bus with the neutral bus and it

shall be sized as per NEC 250.66.

7. Approved copper-clad ground rod, 8'-0" x

5/8" dia. min., with approved connector,

driven into undisturbed earth. Leave exposed

for inspection.

8. Service entrance equipment shall be raintight.

Install sealing lock nuts or hubs on all conduit

penetrations of outdoor enclosures.

9. Sealing locknuts or hubs shall be used on all

conduits that penetrate enclosures in an

exterior installation.

10. The member's contractor shall provide a

tented and heated area for pulling and

terminating conductors for underground

installations when the temperature is less

than +20°F. The heating source will be an

indirect fired system. Contact GVEA's New

Construction section for more information.

11. Service equipment shall be marked with the

available fault current and date calculated

according to NEC 110.24.

12. Conduit runs shall have one set of service

lateral conductors per conduit.

5'-0" MIN.

6'-0" MAX.

LEAVE GROUND ROD

CONNECTION

UNCOVERED FOR

INSPECTION

GROUNDING ELECTRODE

SYSTEM -SEE PAGE 26

MAIN

DISCONNECT

ENCLOSURE

CT

ENCLOSURE

METER

ENCLOSURE

GALVANIZED RIGID

METAL CONDUIT

SIZED PER NEC.

CAUTION TAPE

SERVICE CONDUCTOR

WITH INSULATION TYPE

USE -SEE NOTE 1

1'-6"

MIN.

LEAVE 1'-0" SLACK LOOP

6"

2'-0"

6"


REVISED 03/2020

FINAL GRADE

FINAL GRADE


Typical Permanent Overhead Service

(Over 200 Amps)

SEE NOTE 10

GROUND ROD SHALL BE

PLACED A MINIMUM OF

1'-6" FROM STRUCTURE

1. In addition to the requirements of NEC 230.9, service

drop conductors shall be a minimum of 3'-0" from any

door, opening window, gable vent, or other building

opening. The service drop conductors may be less than

3'-0" when installed above a gable vent or non-opening

window per the Exception to NEC230.9(A).



clearance) below power cable at all points. See NESC

235C1, Exception 3.

4. Member shall provide and maintain a minimum 4'-0"

wide clearing for service drop conductors between

service entrance and GVEA pole.

5. Utility service drop is limited to a maximum 150'-0"

span. Messenger cable is furnished by GVEA.



City Limits.





9. The maximum ampacity of an overhead service shall

be limited to 300 Amps single phase or 275 Amps three

phase. If a service greater than 300 Amps single phase

or 275 Amps three phase is required then it will be

served by an underground connection.

10. Sealing locknuts or hubs shall be used on all conduits

that penetrate enclosures in an exterior installation.

11. Grounding electrode conductors sized per NEC 250.66

with minimum size to be #4 Cu in accordance with

GVEA requirements. For specific service entrance, see

approved GVEA load data for minimum permissible

grounding electrode conductor size. See note 18 on

page 25 for another grounding electrode bonding

jumper connection option. Grounding conductors shall

be continuous as per NEC 250.64(C) and protection

from physical damage as per NEC 250.64(B).

12. Service equipment shall be marked with the available

fault current and date calculated according to NEC

110.24.

5'-0" MIN.

6'-0" MAX.

LEAVE GROUND ROD

CONNECTION

UNCOVERED FOR

INSPECTION

GROUNDING ELECTRODE

SYSTEM -SEE PAGE 26

GALVANIZED OVAL EYEBOLT 5/8" MIN

-SEE NOTES 1, 4, & 5

METER

ENCLOSURE

CT

ENCLOSURE

MAIN

DISCONNECT

ENCLOSURE

COPPER CLAD STAPLE EVERY 6"

CONDUIT STRAP

LEAVE 1'-6" TAIL

-SEE NOTE 6 & 7

SERVICE EQUIPMENT WITH

MAIN DISCONNECT, CT

AND METER ENCLOSURE

-SEE PAGE 25

3'-0"

MIN.

14'-0" MIN.

2'-0" MAX.

GROUNDING ELECTRODE

CONDUCTOR -SEE NOTES 2 & 11

6"


FINAL GRADE

REVISED 03/2020


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Underground Service

(Not to Exceed 300 Amps)

1. It is highly recommended that all conductors or cables

under drivable areas be placed in conduit. 10'-0"

minimum distance from meter to transformer.




City Limits.




5. If grounding requirements of NEC 250.50 cannot be

met, and made electrodes are utilized as the sole type

of grounding electrodes, then the resistance

requirements of NEC 250.53(A)(2) shall be met.

Electrodes may be directly bonded together with

grounding electrode conductor, individually routed to

the neutral bus, or connected to an optional terminal

bus as stated in note 18 on page 25. A ground rod is

required by GVEA even if a metal water pipe or

other electrodes listed in NEC 250.50 are used.

6. Approved copper-clad ground rod, 8'-0" x 5/8" diameter

minimum, with approved connector, driven into

undisturbed earth. Leave exposed for inspection.

7. Sealing locknuts or hubs shall be used on all conduits

that penetrate enclosures in an exterior installation.



9. Location of any customer facilities approved by GVEA

does not take into consideration underground

obstructions; it is the owner’s responsibility to call other

utilities for underground locates and to identify any

underground obstructions prior to placing any new

equipment.

10. The member's contractor shall provide a tented and

heated area for pulling and terminating conductors for

underground installations when the temperature is less

than +20°F. The heating source will be an indirect fired

system. Contact GVEA's New Construction section for

more information.



GROUND RODS

-SEE NOTES 5 & 6

SERVICE

100 Amp

200 Amp

SIZE

Copper

Copper

MINIMUM

GROUNDING

#4

#4


WIRE SIZE

MINIMUM

#2

#3/0

Copper

Copper

CONDUIT SIZE

1 1/4"

2"

MINIMUM

(USE, XHHW,

(RMC OR IMC)

ELECTRODE

CONDUCTOR

SIZE

Copper

Copper

EQUIPMENT

#8

#6

GROUNDING

CONDUCTOR

SIZE

300 Amp

Copper

#2300 kcmil

Copper

2"

Copper

#4

OR RHW)*

* Conductor insulation shall be type XHHW or RHW for

installations in conduit, or type USE for direct burial installations.

MINIMUM

FINAL GRADE

MINIMUM 8"x8" MEMBER-OWNER PRESSURE

TREATED TIMBER RATED FOR DIRECT GROUND

CONTACT OR POLE (TIMBER NOT SHOWN)

5'-0" MIN.

6'-0" MAX.

SERVICE CONDUCTOR WITH INSULATION TYPE

USE TO PAD OR POLE MOUNT TRANSFORMER

OR SECONDARY PEDESTAL -SEE NOTE 1

LEAVE 1'-0" SLACK LOOP TYP.

CAUTION TAPE 6" FROM FINISH GRADE. RUN

THE FULL LENGTH OF THE CONDUCTOR RUN.

2'-0"

GALVANIZED RIGID METAL CONDUIT

STAND-OFF BRACKET IF POLE IS USED.

UNISTRUT MOUNTING IF TIMBER IS

USED. (TIMBER NOT SHOWN)

3'-0" MIN.

1'-6" MIN.

(TYP.)

1'-6"6'-0" MIN.

6"

RAINTIGHT SERVICE ENTRANCE EQUIPMENT

ON POLE HUGGER BRACKETS FOR POLE

MOUNTING AND UNISTRUT MOUNTS FOR

TIMBER MOUNTING.

OPTIONAL CONSTRUCTION OUTLET SHALL BE

RAINTIGHT GFCI

COPPER CLAD STAPLE EVERY 6" -SEE NOTE 4

GROUNDING ELECTRODE CONDUCTOR

GALVANIZED RIGID METAL CONDUIT IF

CONSTRUCTION OUTLET IS OMITTED

MEMBERS FEEDER AND EQUIPMENT GROUNDING

CONDUCTORS IF CONSTRUCTION OUTLET IS OMITTED


REVISED 03/2020



Trench must be inspected by GVEA prior to backfill.

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Underground Service on Plywood Backboard

1. It is highly recommended that all conductors or cables

under drivable areas be placed in conduit. 10'-0"

minimum distance from meter to transformer.




City Limits.




5. If grounding requirements of NEC 250.50 cannot be met,

and made electrodes are utilized as the sole type of

grounding electrodes, then the resistance requirements

of NEC 250.53(A)(2) shall be met. Electrodes may be

directly bonded together with grounding electrode

conductor, individually routed to the neutral bus, or

connected to an optional terminal bus as stated in note

18 on page 25. A ground rod is required by GVEA

even if a metal water pipe or other electrodes listed

in NEC 250.50 are used.

6. Optional terminal bus can be added to connect bonding

jumpers from multiple grounding electrodes. Optional

terminal bus will be effectively bonded to enclosure. A

grounding electrode conductor will connect the optional

bus with the neutral bus and it shall be sized as per NEC

250.66.

7. Approved copper-clad ground rod, 8'-0" x 5/8" dia.

minimum, with approved connector, driven into


8. Service entrance equipment shall be raintight. Install

sealing lock nuts or hubs on all conduit penetrations of

outdoor enclosures.



obstructions; it is the owner’s responsibility to call other



equipment.






more information.

11. Conduit runs shall have one set of service lateral

conductors per conduit.



GROUND RODS

-SEE NOTES 5 & 6

SERVICE

100 Amp

200 Amp

SIZE

Copper

Copper

MINIMUM

GROUNDING

#4

#4


#2

#3/0

Copper

Copper

1 1/4"

2"

ELECTRODE

CONDUCTOR

SIZE

Copper

Copper

EQUIPMENT

#8

#6

GROUNDING

CONDUCTOR

SIZE

* Conductor insulation shall be type XHHW or RHW for

installations in conduit, or type USE for direct burial installations.

MINIMUM

FINAL GRADE

MINIMUM 6"x6" MEMBER-OWNER PRESSURE

TREATED TIMBER RATED FOR DIRECT GROUND

CONTACT (TYP OF TWO)

5'-0" MIN.

6'-0" MAX.

SERVICE CONDUCTOR WITH INSULATION TYPE

USE TO PAD OR POLE MOUNT TRANSFORMER

OR SECONDARY PEDESTAL -SEE NOTE 1

LEAVE 1'-0" SLACK LOOP (TYP.)

CAUTION TAPE 6" FROM FINISH GRADE. RUN

THE FULL LENGTH OF THE CONDUCTOR RUN.

2'-0"

3'-0" MIN.

1'-6" MIN.

(TYP.)

1'-6"

MAIN DISCONNECT ENCLOSURE

6"

MEMBERS FEEDER AND EQUIPMENT

GROUNDING CONDUCTORS

SERVICE EQUIPMENT WITH MAIN DISCONNECT

-SEE PAGE 25, CT AND METER ENCLOSURE

SHALL MEET ALL REQUIREMENTS SHOWN

BARE COPPER GROUNDING ELECTRODE

CONDUCTOR -SEE PAGE 25, CT METERED

SERVICE GROUNDING DETAIL

GALVANIZED RIGID METAL CONDUIT,

NUMBER OF RUNS AS REQUIRED

CT ENCLOSURE

METER ENCLOSURE

3/4" PRESSURE TREATED

ALL WEATHER PLYWOOD

6" MAX.

(TYP.)

6'-0" MIN.


REVISED 03/2020



MINIMUM

CONDUIT

SIZE (RMC

OR IMC)

MINIMUM

WIRE SIZE

(USE, XHHW,

OR RHW)*

Trench must be inspected by GVEA prior to backfill.

Typical Pole Mounted Service

(Not to Exceed 300 Amps)

1. If service drop exceeds 50'-0", pole shall be guyed. Service

drop shall not exceed 150'-0". See guying details on page 20.

2. Telephone drop shall be more than 1'-0" (vertical clearance)

below power cable at all points. See NESC 235C1, Exception

3.

3. Use of split bolts is not allowed.

4. Members shall provide and maintain a minimum 4'-0" wide

clearing between the service entrance and the GVEA pole.

5. A bare copper conductor shall be connected to the neutral,

service enclosure at disconnect, and to the well or ground rod.

See table below for size.

6. Approved copper-clad ground rod, 8'-0" x 5/8" dia. minimum,

with approved connector, driven into undisturbed earth. Leave

exposed for inspection.

7. Per NEC 250.53(A) two ground rods must be installed if they

are utilized as the sole type of grounding electrodes. One

ground rod may be installed if the resistance requirements of

NEC 250.53(A)(2) are met. Electrodes shall be directly

bonded together with grounding electrode conductor. See

page 27 for service grounding detail.

8. Temporary construction service is not to be used for

energizing permanent wiring systems. Construction service is

approved for construction power only. Service will be

disconnected 12 months after connect or if permanent wiring is

energized.


10. Meter poles shall be fully pressure treated. Cedar poles are

not accepted. Minimum pole length shall be 25'-0", buried at a

depth of 5'-0". Poles 30'-0" and longer must be buried 10% of

pole length plus 2'-0". The fill around the pole must be tamped

firm so that the pole will not lean when it is climbed. Pole brand

(belly button) must be visible after equipment is mounted.

11. For services above 200 amps see page 16 for CT service or

page 15 for 300A self-contained service or contact GVEA's

Engineering Department for information on temporary

construction.

12. Meter poles are to be placed a minimum of 20'-0" from primary

lines.

13. If the grounding electrode conductor is exposed to physical

damage it shall be run in conduit securely fastened to the pole.

See NEC 250.64(B).

14. Service entrance equipment shall be raintight. Install sealing

lock nuts or hubs on all conduit penetrations of outdoor

enclosures.

15. Self-contained 300 Amp service is single-phase only. See

page 15 for details.

16. The maximum ampacity of an overhead service shall be limited

to 300 Amps single phase or 275 Amps three phase. If a

service greater than 300 Amps single phase or 275 Amps

three phase is required then it will be served by an

underground connection.

17. Local governing bodies may require specific clearances above

that shown depending on the location of the service drop

conductors. If applicable, specific required service drop

clearances may require longer pole lengths. Contact GVEA's

Engineering Services department for a determination prior to

any installation.

LEAVE GROUND

ROD CONNECTION

UNCOVERED FOR

INSPECTION

GROUND RODS

-SEE NOTES 6 & 7

SERVICE

100 Amp

200 Amp

SIZE

Copper

Copper

MINIMUM

GROUNDING

#4

#4


WIRE SIZE

MINIMUM

#2

#3/0

Copper

Copper

CONDUIT SIZE

1 1/4"

2"

MINIMUM

(USE, XHHW,

(RMC OR IMC)

ELECTRODE

CONDUCTOR

SIZE

Copper

Copper

EQUIPMENT

#8

#6

GROUNDING

CONDUCTOR

SIZE

300 Amp

Copper

#2300 kcmil

Copper

2"

Copper

#4

OR RHW)*

MINIMUM

5'-0" MIN.

6'-0" MAX.

5'-0"

MIN.

GROUNDING ELECTRODE

CONDUCTOR -SEE NOTE 5


5'-0"

MAX.

POLE BRAND MUST

BE EXPOSED FOR

INSPECTION

MEMBER-OWNED

PRESSURE

TREATED POLE

ANGLE THIMBLE EYEBOLT

AND GALVANIZED SQUARE

WASHER

1'-6"

MIN.

6'-0" MIN.

6"

25'-0"

MIN.

COPPER CLAD STAPLES EVERY 6"

-SEE NOTE 3

OPTIONAL CONSTRUCTION

OUTLET SHALL BE

RAINTIGHT GFCI

SERVICE ASSEMBLY 100

AMP MIN.

STAND-OFF BRACKETS

MAINTAIN 6" CLEARANCE

BETWEEN CONDUIT AND

POLE

CONDUIT AND POLE MUST

BE INSTALLED PLUMB TO

GROUND


SIZE TABLE & NOTE 9

2'-0"

MAX.

UTILITY SERVICE

DROP -SEE NOTES

1, 4, 12, & 17

6" MIN

1'-0" MAX.

GALVANIZED OVAL EYENUT

AND GALVANIZED SQUARE

WASHER

6"

MIN.

NOTES: See pages 3-7 for general requirementsREVISED 08/2020


FINAL GRADE

GUY CABLE 1/4" MIN.

GALVANIZED STEEL

OR ALUMINUM CLAD

CABLE -SEE NOTE 1

PERFORMED GRIP

OR 3 BOLT CLAMP

1

L

2

L

N

2

L

L

1

N

1

L

2

L

N

E

G

C

UNDERGROUND OR OVERHEAD SERVICE

WATER PIPE, SEE NOTES 2 & 5

GROUND ROD

GROUND RING

BUILDING STEEL

CONCRETE ENCASED ELECTRODE

300 Amp Single-Phase Self-Contained Meter

REVISED 03/19

1. Service entrance location shall be approved by GVEA

and shall be located as close as possible to existing

GVEA facilities.

2. Conduit for service cable shall be sized per NEC but

shall not be less than 2".

3. Member's service equipment shall conform to the NEC

and State and Municipal Codes and shall be inspected

and approved prior to connection of service by GVEA.

4. Standard 300 Amp service rated breaker is an

acceptable main disconnect.

5. Meter socket shall conform to requirements on pages 4

and 5 for 100-200 Amp services with these exceptions:

-Socket rated for 300 Amps or greater

-Bypass lever required

-Upper right hand jaw shall be reduced or have

anti-inversion clip installed to prevent insertion of

200A meter.

-Meter enclosure to be the ringless type to

accommodate the required meter bypass lever.

6. The maximum ampacity of service shall be limited to

300 Amps, based on NEC calculated load. If a service

greater than 300 Amps is required, this optional service

will not be allowed.

7. No deviation from this standard shall be allowed unless

approved in writing by GVEA's Engineering Services

Department prior to installation.

8. Sealing lock nuts or hubs shall be installed on conduit


SERVICE

SIZE

MINIMUM

GROUNDING


ELECTRODE

CONDUCTOR

SIZE

EQUIPMENT

GROUNDING

CONDUCTOR

SIZE

300 Amp

Copper

#2

300 kcmil Copper

See note 4 & 6

2"

Copper

#4

MINIMUM

8'-0" x 5/8" DIA. MIN. COPPER CLAD

GROUND ROD TYP.


GROUNDING ELECTRODE SYSTEM,

SEE NOTES 1 & 3 ON PAGE 26

SEE NOTE 8 ON PAGE 25

CONTINUOUS GROUNDING ELECTRODE

CONDUCTOR TO GROUND ROD,


IRREVERSIBLE COMPRESSION CONNECTOR

GROUNDING ELECTRODE

CONDUCTOR MIN. #2 AWG

COPPER, SEE NOTES 8 & 9

ON PAGE 25

4-WIRE FEEDER TO

DISTRIBUTION PANEL

GROUNDING BLOCK SHALL

BE PERMANENTLY BONDED

TO ENCLOSURE

COMBINATION RAINTIGHT

METER AND SERVICE

ENCLOSE, SEE NOTE 6 & 7

SERVICE ASSEMBLY

METER BYPASS LEVER,

SEE NOTE 5

FROM GVEA POWER SYSTEM

MAIN BREAKER OR DISCONNECT

AND FUSES, SEE NOTE 4




MINIMUM

CONDUIT

SIZE (RMC

OR IMC)

MINIMUM

WIRE SIZE

(XHHW OR

RHW)

AutoCAD SHX Text

300A

Temporary Construction Service

(CT Service Over 200 Amps)

1. If service drop exceeds 50'-0", pole shall be

guyed. Service drop shall not exceed 150'-0".

See guying details on page 20.


clearance) below power cable at all points. See

NESC 235C1, Exception 3.


4. Members shall provide and maintain a minimum

4'-0" wide clearing between the service entrance

and the GVEA pole.

5. Approved copper-clad ground rod, 8'-0" x 5/8" dia.

min., with approved connector, driven into


6. Per NEC 250.53(A) two ground rods must be

installed if they are utilized as the sole type of

grounding electrodes. One ground rod may be

installed if the resistance requirements of NEC

250.53(A)(2) are met. Electrodes shall be directly

bonded together with grounding electrode

conductor. See page 25 for CT metered service

grounding detail.

7. Temporary construction service is not to be used

for energizing permanent wiring systems.

Construction service is approved for construction

power only. Service will be disconnected 12

months after connect or if permanent wiring is

energized.

8. Conductor insulation shall be type XHHW or

RHW.

9. Meter poles shall be fully pressure treated. Cedar

poles are not accepted. Minimum pole length shall

be 25'-0", buried at a depth of 5'-0". Poles 30'-0"

and longer must be buried 10% of pole length plus

2'-0". The fill around the pole must be tamped firm

so that the pole will not lean when it is climbed.

Pole brand (belly button) must be visible after

equipment is mounted.


physical damage it shall be run in conduit

securely fastened to the pole. See NEC

250.64(B).

11. Meter poles are to be placed a minimum of 20'-0"

from primary lines.

12. The maximum ampacity of an overhead service

shall be limited to 300 Amps single phase or 275

Amps three phase. If a service greater than 300

Amps single phase or 275 Amps three phase is

required then it will be served by an underground

connection.

13. Service entrance equipment shall be rain tight.

Install sealing lock nuts or hubs on all conduit


14. Local governing bodies may require specific

clearances above that shown depending on the

location of the service drop conductors. If

applicable, specific required service drop

clearances may require longer pole lengths.

Contact GVEA's Engineering Services department

for a determination prior to any installation.

MAIN DISCONNECT

ENCLOSURE


AND GALVANIZED

SQUARE WASHER

FINAL GRADE

RMC

CT ENCLOSURE

COPPER CLAD STAPLES

EVERY 6" -SEE NOTE 10

GROUNDING ELECTRODE

CONDUCTOR -SEE NOTE

9 ON PAGE 25

POLE BRAND MUST BE

EXPOSED FOR INSPECTION

STAND-OFF BRACKETS -SEE

NOTE 1 & DETAILS ON PAGE 18

MEMBER-OWNED

PRESSURE TREATED POLE

LEAVE 1'-6" TAIL, CONDUCTORS

SIZED PER LOAD, SEE NOTE 8

GALVANIZED OVAL EYENUT AND

GALVANIZED SQUARE WASHER

UTILITY SERVICE DROP,

SEE NOTES 1, 4, 11, & 14

6" MIN.

6" MIN.

1'-0" MAX.

2'-0" MAX.

25'-0"

MIN.

LEAVE GROUND

ROD CONNECTION

UNCOVERED FOR

INSPECTION

GROUND RODS

-SEE NOTES 5 & 6

6'-0" MIN.

1'-6"

MIN.

6" 6"

5'-0"

MIN.

5'-0" MIN.

TO

6'-0" MAX.


FRONT VIEW

SIDE VIEW


REVISED 08/2020

METER ENCLOSURE

SERVICE EQUIPMENT

WITH MAIN DISCONNECT,

CT, AND METER

ENCLOSURE ON

UNISTRUT SHALL MEET

ALL REQUIREMENTS

SHOWN ON PAGE 25.

MAINTAIN CLEARANCE OF

6" BETWEEN CONDUIT AND

POLE

PREFORMED GRIP OR 3

BOLT CLAMP

GUY CABLE MIN 1/4"

GALVANIZED STEEL

OR ALUMINUM CLAD

CABLE -SEE NOTE 1

CONDUIT AND POLE MUST

BE INSTALLED PLUMB TO

GROUND

PLAN VIEW

SIDE VIEW

Pole Mounted Riser Details For Secondary URD Riser Service

CONDUIT INSTALLATION


GROUNDING CLAMPS TO BE

PROVIDED BY MEMBER. BOND

CONDUITS TO POLE GROUND.

RIGID SWEEP. PVC SWEEPS

WILL NOT BE ACCEPTED.

IRREVERSIBLE COMPRESSION

CONNECTOR

8'-0" MIN.

SEE NOTE 3

ON PAGE 18

3'-0" MIN.

18" MIN.

6"

TRANSFORMERS ABOVE

TRANSFORMER BANK

CENTERLINE

12"-18"

PROVIDE SUFFICIENT LENGTH

OF SECONDARY CONDUCTOR

TO REACH TRANSFORMER LUGS

SIDE VIEW

18" MIN.

6"

TRANSFORMER LOCATION

ABOVE MAY VARY

ROTATE 45° FROM TRANSFORMER OR

CENTERLINE OF TRANSFORMER BANK.

PLACE STAND-OFF BRACKET IN EITHER

QUADRANT ON THE SAME SIDE OF POLE

AS THE TRANSFORMER. SEE NOTE 1

AND DETAILS ON PAGE 18.

6" MIN. SEE NOTE 1 ON PAGE 18

3'-0" MIN.

12"-18"

CLIMBING ZONE.

NO EQUIPMENT

PLACED IN THIS

AREA WITHOUT

APPROVAL FROM

GVEA.

CLIMBING ZONE.

NO EQUIPMENT

PLACED IN THIS

AREA WITHOUT

APPROVAL FROM

GVEA.

PLAN VIEW

SINGLE-PHASE SERVICE

THREE-PHASE SERVICE

6" MIN. SEE NOTE 1 ON PAGE 18

8'-0" MIN.

SEE NOTE 3

ON PAGE 18


CONNECTOR

GROUND ROD AND POLE

GROUND CONDUCTOR

PROVIDED BY GVEA

LEAVE TRENCH OPEN

FOR INSPECTION

REVISED 03/2020

GROUND ROD AND POLE

GROUND CONDUCTOR

PROVIDED BY GVEA


DETAIL 3

2 ea. 4" CONDUITS ON ONE SIDE OF

THE STAND-OFF BRACKET

1 ea. 4" AND 1 ea. 2" CONDUITS ON ONE

SIDE OF THE STAND-OFF BRACKET

DETAIL 1

2 ea. 4" CONDUITS ON TWO SIDES OF

THE STAND-OFF BRACKET

DETAIL 4

1 ea. 4" AND 1 ea. 2" CONDUITS ON TWO

SIDES OF THE STAND-OFF BRACKET

DETAIL 2

Stand-Off Bracket Details For Secondary URD Riser

REVISED 03/19

1. 6" minimum between pole and conduit is required. Conduit

installations with less than 6" clearance will not be accepted. Only

one set of stand-off brackets will be allowed on a pole.

Contact GVEA's New Construction office for information about

adding new services to a pole with existing risers.

2. All conduit shall be stubbed out of ground 3'-0" for inspection.

Conduits out of plumb will not be accepted.

3. The initial section of conduit shall have two brackets. Subsequent

conduit sections require only one bracket. Standoff brackets on

supporting structures shall be arranged such that there is not less

than 8'-0" between either the lowest bracket, the ground, or other

accessible surface as specified in NESC 217.A.2.C.

4. Minimum sized stand-off bracket shall be 15". Stand-off bracket

details number 1 through 4 shows the maximum number of

conduits and conduit sizes allowed on 15" and 18" stand-off

brackets.

5. If the number of conduits exceed that shown in details 1 through

4, contact GVEA's New Construction Department for a solution.

The maximum size pole mounted three-phase transformer bank is

225 kVA.

6. GVEA has the option to replace pole mounted transformer(s) with

pad-mounted transformer if design constraints require it.

7. Items on this sheet shall be furnished by member's electrical

contractor. GVEA will install materials above the 3'-0" level.


18" STAND-OFF

BRACKET

18" STAND-OFF

BRACKET

15" STAND-OFF

BRACKET

15" STAND-OFF

BRACKET

6" MIN.

-SEE NOTE 1

4.5" O.D.

1.5"

2.5" O.D.

6" MIN.

-SEE NOTE 1

4.5" O.D.

1.5"

2.5" O.D.

6" MIN.

-SEE NOTE 1

4.5" O.D.

2"

4.5" O.D.

6" MIN.

-SEE NOTE 1

4.5" O.D.

2"

4.5" O.D.

#2AWG - 3/0 AWG

-Contractor to dig trench & install materials, including first 3'-0" of

riser on primary pole for inspection by GVEA. Trench must be

inspected prior to backfill.

-Contractor shall provide sufficient amount of conduit (RMC or

IMC) to reach base of transformer, secondary conductors,

standoff brackets, pipe clamps, ground clamps, lag bolts, rigid

sweeps, and weather head.

-Leave wire coiled at base of pole.

-GVEA linemen will install remainder of riser and wire.

4/0AWG and Larger

-Contractor to dig trench & install materials, including first 3'-0" of

riser on primary pole with jet line pulled in. Trench must be

inspected prior to backfill.

-Contractor shall provide sufficient amount of conduit (RMC or

IMC) to reach base of transformer, secondary conductors,

standoff brackets, pipe clamps, ground clamps, lag bolts, rigid

sweeps, and weather head.

-If run is more than 75'-0" contractor will provide wire on individual

reels and reel stands.

-GVEA will pull wire with Contractor assistance.

-GVEA will provide pulling equipment to include pulling harness,

large diameter traveler and bull rope.

Secondary Riser Build


Guying To A Structure

REVISED 03/19

1. All service conduit extending above the roof shall be

minimum 2" rigid conduit and shall be guyed. Roof guy

line shall be minimum 1/8" stainless steel wire (aircraft

cable) with approved crosby clamps. Quantity/Length

determined by installation requirements.

2. No other attachments are permitted on the mast.

3. For mast heights greater then 5'-0" the mast assembly

and guying shall be designed by a qualified engineer.

Mast designs shall be submitted to GVEA's

Engineering Services Department and the City of

Fairbanks Electrical Inspector, if required, for review

prior to installation.

45° OR MORE

VERTICAL STRUCTURE

EYEBOLT MOUNTING DETAIL

INCORRECT INSTALLATION

THE OVAL EYE BOLT MOUNTED

TO ONLY ONE SUPPORT

BOARD SHALL NOT BE

ACCEPTED! THIS IS TYPICAL

FOR ALL INSTALLATIONS

REGARDLESS OF VERTICAL,

HORIZONTAL, OR OTHER

INSTALLED ORIENTATION.

ROOF GUY DETAIL B - 3 GUYS

ONLY WITH PRIOR GVEA APPROVAL

FOR MAST HEIGHT OF 3'-6" TO 5'-0"

HORIZONTAL STRUCTURE

EYEBOLT MOUNTING DETAIL

ROOF GUY DETAIL A - 1 GUY

3'-6" MAXIMUM MAST HEIGHT


GVEA SERVICE

DROP CONDUCTORS

(TO GVEA POLE AND

TRANSFORMER)

TOP VIEW

ELEVATION TOP VIEW

MAST CLAMPS

MAST

THIMBLE EYEBOLT

CROSBY CLAMP

GUY CABLES

MAST CLAMPS

GUY CABLE

CROSBY CLAMP

THIMBLE EYEBOLT

LEAVE 1'-6"

TAILS

3'-0" MIN.

3'-6" MAX.

MAST -SEE

NOTE 2

ROOF FLASHING

AND SEAL

CONDUIT STRAPS

MAST

MAST CLAMPS

GVEA SERVICE DROP

CONDUCTORS (TO GVEA

POLE AND TRANSFORMER)

THIMBLE EYEBOLT

CROSBY CLAMP

GUY CABLE

EXISTING WALL

STUDS

INSULATION

WASHER &

SQUARE NUT

DEAD AIR SPACE

INTERIOR

SHEETROCK

WALLBOARD

WASHER & SEAL

OVAL EYE BOLT

EXTERIOR SHEATHING

2" x 6" BOARDS LENGTH

AS REQUIRED

INSULATION

WASHER & SQUARE

NUT

WASHER & SEAL

THIMBLE EYEBOLT

INTERIOR SHEETROCK

WALLBOARD

DEAD AIR SPACE

EXISTING ROOF

JOISTS OR TRUSS

ROOF FLASHING

AND SEAL

2" x 6" BOARDS

LENGTH AS

REQUIRED

MAST CLAMP FOR ROOF

GUYING SUPPLIED BY

MEMBER

MAST CLAMP FOR

ROOF SERVICE FROM

SUPPLIED BY GVEA

CROSBY CLAMP

GUY CABLE

VE

RT

IC

AL

180°

180°

30°

30°


Guying A Pole

180°

GUY CABLE SHALL BE

IN LINE WITH SERVICE

DROP

POLE

UTILITY SERVICE DROP (TO

GVEA POLE & TRANSFORMER)

OVAL EYENUT

GALVANIZED SQUARE

WASHER


PREFORMED GRIP

GUY CABLE MIN. 1/4"

GALVANIZED STEEL

OR ALUMINUM CLAD

CABLE

SCREW ANCHOR SHALL BE INSTALLED

A MINIMUM OF 15'-0" FROM METER POLE

(MEASURED AT FINAL GRADE).

REVISED 03/2020

TOP VIEW

SIDE VIEW

POLE GUY DETAIL

SCREW ANCHOR DETAIL

FINAL GRADE

5'-0" MIN.

6" MAX.

6"

MIN.


REMOTE POWER

SERVICE DISCONNECT

ST

CCS

TRANSFORMER

L1 L2 L3

PB

OCP

EXTERIOR INTERIOR

LOAD

UTILITY

CIRCUITS

ST

CCS

TRANSFORMER

L1 L2 N

PB

OCP

EXTERIOR INTERIOR

LOAD

UTILITY

CIRCUITS

L3

Shunt Trip Details

REVISED 03/19

1. CCS: Contact Clearing Switch (opens when circuit breaker is shunt

tripped).

OCP: Overcurrent Protection, Shunt Trip Circuit (rated for available

fault current and source voltage). Installed as close to source as

practical.

PB: Push Button Switch, push-pull, normally open, Square D K type

with mushroom push button (or equal)

ST: Shunt Trip Coil, coil voltage rated for source voltage. Sourced from

load side of Main Disconnecting Means (main circuit breaker).

2. Verify additional requirements and coordinate lockable enclosures

housing the push button operator with the Fire Department having

jurisdiction and serving the facility. The push button operator must be

in a location that is readily accessible to fire department

personnel.

3. The push button operator shall be grouped together with meter on the

outside of the building to be served and mounted at a height of 5'-0" to

6'-0" above final grade.

4. The push button operator shall be suitable for the environment in which

it is installed.

5. A second shunt trip circuit shall be installed adjacent to the service

disconnect shunt trip to shutdown and disconnect any emergency

power sources. This plaque shall read "GENERATOR DISCONNECT"

or "EMERGENCY POWER DISCONNECT".

6. Conduit between Main Disconnecting Means and Shunt Trip Push

Button Operator shall be RMC or IMC.

7. Conductor insulation shall be XHHW or RHW.

8. An engineered design for the shunt trip circuit is required. The design

shall specify the OCP rating, shunt trip conductor size, pushbutton

rating, shunt trip unit, etc.

9. The shunt trip circuit shall be tested on a regular basis to ensure the

Main Disconnecting Means can be remotely tripped.

10. See Page 6, Section 4 for other details.

JUNCTION BOX OR ENCLOSURE.

PLAQUE MOUNTED ON OUTSIDE

OF ENCLOSURE IF PUSH BUTTON

HOUSED INSIDE OF ENCLOSURE.

2" x 5" (H x W) METAL OR

PLASTIC PLAQUE WITH

ENGRAVED 1/4" LETTERING.

SHUNT TRIP UNIT HOUSING

REMOTE PUSH BUTTON OPERATOR AND

PLACARD EXAMPLE INSTALLATION

EXAMPLE LINE TO LINE CONNECTION SCHEMATIC EXAMPLE LINE TO NEUTRAL CONNECTION SCHEMATIC

EXTERNALLY MOUNTED

PUSH BUTTON

MAIN DISCONNECTING MEANS

(MAIN CIRCUIT BREAKER)

EXTERNALLY

MOUNTED

PUSH BUTTON

SHUNT TRIP UNIT HOUSING

MAIN DISCONNECTING MEANS

(MAIN CIRCUIT BREAKER)

EXTERNALLY

MOUNTED

PUSH BUTTON



12

3

4

5 6

1

2

N

L

L

Typical Multiple Meter Service Entrance

(Six Units or Less)

METER SOCKET. METERS INSTALLED BY GVEA



GVEA facilities.


shall not be less than 2". Conduit runs shall have one

set of service lateral conductors per conduit.




4. Any deviation from this standard shall be approved in

writing by GVEA's Engineering Services Department.

5. Conductor insulation shall be type USE for direct burial

installations or type XHHW or RHW for installations in

conduit.




7. The bottom of the service entrance equipment shall not

be less than 3'-0" above finished grade or finished floor.

Choose equipment size to maintain this minimum

distance and a maximum height of 6'-7" to the horizontal

centerline of the highest breaker or handle of the

disconnecting means.

8. Install sealing lock nuts or hubs on all conduit


9. If conductors are 3/0AWG or smaller, direct burial is

acceptable.

TYPICAL SERVICE BREAKER RATED FOR

AVAILABLE FAULT CURRENT (MIN. 10,000 AIC)

ALL METER BASES SHALL BE IDENTIFIED

WITH PERMANENT LABELING (PERMANENT

MARKER NOT ALLOWED) -SEE PAGE 4

SERVICE ENTRANCE BUSING

IF CONCENTRIC KNOCKOUT IS USED

GROUND BONDING BUSHING TO

ENCLOSURE WITH A BONDING JUMPER.

RIGID METAL CONDUIT

CONDUIT CLAMP

GALVANIZED RIGID METAL ELBOW

6'-7" MAX.

NEMA TYPE 3R RAIN

RESISTANT GROUPED

METERING ENCLOSURE

3'-0" MIN.

SEE NOTE 7

COPPER CLAD STAPLED

EVERY 6"

GROUNDING ELECTRODE

CONDUCTOR #4 COPPER

MINIMUM SIZE -SEE NOTE

6 & GROUNDING DETAIL

ON PAGE 26

2'-0" MIN.

CABINET SHALL BE ABLE TO BE SEALED BY GVEA

TO APPROVED GROUND

-SEE GROUNDING

DETAIL ON PAGE 27

FINAL GRADE


REVISED 03/2020


12

34

5

6

7 8

L

L

N

1

2

Typical Multiple Meter Service Entrance

(More than Six Units)

REVISED 03/19

METER SOCKET

METER INSTALLED BY GVEA



GVEA facilities.


shall not be less than 2". Conduit runs shall have one

set of service lateral conductors per conduit.




4. Where fused disconnects are provided, a separate fuse

access door shall be provided, interlocked with the main

switch, to permit fuse replacement by owner without

breaking the main service cabinet seals. (An internal

barrier suitable for sealing is not acceptable).

5. Any deviation from this standard shall be approved in

writing by GVEA's Engineering Services Department.



conduit.

7. The bottom of the service entrance equipment shall not

be less than 3'-0" above finished grade or finished floor.

Choose equipment size to maintain this minimum

distance and a maximum height of 6'-7" to the horizontal

centerline of the highest breaker or handle of the

disconnecting means.

8. Install sealing lock nuts or hubs on conduit penetrations

of outdoor enclosures.

9. Service with 6 or more meters is required to have a main

breaker service disconnect.

10. If conductors are 3/0AWG or smaller, direct burial is

acceptable.

TYPICAL SERVICE BREAKER

RATED FOR AVAILABLE FAULT

CURRENT (MIN. 10,000 AIC)

ALL METER BASES SHALL BE

IDENTIFIED WITH PERMANENT

LABELING (PERMANENT MARKER

NOT ALLOWED) -SEE PAGE 4

IF CONCENTRIC KNOCKOUT IS USED

GROUND BONDING BUSHING TO

ENCLOSURE WITH A BONDING JUMPER.

GALVANIZED METAL CONDUIT

CONDUIT CLAMP

GALVANIZED RIGID METAL

ELBOW

NEMA TYPE 3R RAIN RESISTANT

MODULAR METERING ENCLOSURE

COPPER CLAD STAPLED EVERY 6"


#4 COPPER MINIMUM SIZE -SEE

GROUNDING DETAIL ON PAGE 26

FINAL GRADE

INTERNAL BUS BARS TO BE RATED

FOR AVAILABLE FAULT CURRENT

TO APPROVED GROUND

-SEE GROUNDING

DETAIL ON PAGE 26

2'-0" MIN.

MAIN BREAKER OR FUSED DISCONNECT

RATED FOR AVAILABLE FAULT

CURRENT (MIN. 10,000 AIC)

CABINET SHALL BE ABLE TO BE SEALED

BY GVEA

MAX. 4 METERS VERTICAL

6'-7" MAX.

3'-0" MIN.

SEE NOTE 7



Typical CT Metered Service

(1200 Amps and Below)

1. Conductors shall be connected to the CT mounting bracket

using appropriate UL approved compression connectors or

mechanical lugs, suitable for the conductor material type.

Aluminum conductors shall not be directly connected using

mechanical lugs.

2. This drawing is not intended to show grounding details. See

page 25 and 27 for Grounding Details.

3. Conduit for meter conductors shall be at least 1 inch diameter

and no longer than 50'-0". Conduit shall be RMC or IMC. No

Compression Fittings shall be accepted. All conduit used for CT

circuits shall be of the threaded type.

4. Mount CT's to the cabinet using factory accessory or brackets

installed at factory, with allowable short circuit fault current

rating marked on accessory or cabinet. Both ends of all

mounting bolts shall be accessible for future removal. Mount so

as to allow NEC required space to train both source and load

conductors. CT's shall be mounted at right angles to enclosure

panels with polarity marks facing source side.

5. CT cabinet cover shall have two handles or similar lifting device

or be hinged.

6. CT cabinet, meter enclosure, and main disconnects shall be

grouped together on the outside of building. All enclosures shall

be rain resistant (NEMA 3R). Inside locations are not permitted

without approval prior to installation.

7. On service above 1200 Amps, switch gear installation is

preferred. Submit CT information to GVEA for approval.

8. GVEA shall install CT secondary wiring and test switch.

9. This area for GVEA supplied test switch. See page 6, "Current

Transformer Bypass Provisions."


installations or type XHHW or RHW for installations in conduit.

11. The member's contractor shall provide a tented and heated

area for pulling and terminating conductors for underground

installations when the temperature is less than +20°F. The

heating source will be an indirect fired system. Contact

GVEA's New Construction section for more information.

12. Equipment grounding conductor (EGC) to distribution panel(s)

required. See NEC 250.32(B).

13. Sealing locknuts or hubs shall be used on all conduits that

penetrate enclosures in an exterior installation.

14. Service equipment shall be marked with the available fault

current and date calculated according to 2014 NEC 110.24.

15. Use Burndy Hystack or equivalent when landing multiple sets

of conductors. Using nuts to separate conductors will not be

accepted.

METER INSTALLED

BY GVEA

STANDING SURFACE (floor, etc.)

SOURCE

CURRENT TRANSFORMER CABINET

(Min. Size W x H x D)

1200 and Below

Above 1200

SERVICE ENTRANCE

CONDUCTOR AMPACITY

Consult Utility

LOAD

CURRENT TRANSFORMER CABINET

SERVICE DISCONNECT SWITCH

Install CT with polarity

dot toward SOURCE.

SEE NOTE 9

SEE NOTE 2

SEE NOTES

1, 4, & 7

METER

ENCLOSURE

3Ø - 3'-0" x 3'-0" x 11"

1Ø - 2'-0" x 2'-8" x 9"

SEE NOTE 13

FUSE

CT

SEE NOTE 8

SEE NOTE 12

SEE

NOTES

3 & 13

11" MIN.

9 1/2"

MIN.

5'-0" MIN.

6'-0" MAX.

1.5"

MIN.

3"

MIN.


REVISED 03/2020


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GVEA 13725

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60 387 203

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8

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KILOWATTHOURS

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GENERAL

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9

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TYPE

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1-70-S

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kh

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7.2

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ELECTRIC

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F

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8

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6

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3

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S

Grounding Details

(CT Metered Service with Main Disconnect)

1. All service enclosures shall be NEMA 3R outdoor type. Hubs are to be

of the sealable type. Hubs exposed to weather shall be rated weather

tight.

2. All CT and meter enclosures shall be sealable and have locknuts,

hubs and hub covers that are not removable from exterior of can.

3. This conduit shall be continuous. No junction boxes, unions, or

conduit bodies are permitted.

4. These conduits shall be Rigid Metal Conduit (RMC) or Intermediate

Metal Conduit (IMC) and sized in accordance with NEC 344.22 for

RMC and 342.22 for IMC. No compression fittings shall be accepted.

Sealing locknuts shall be installed on conduits penetrating outdoor

enclosures.

5. Conduit size between CT and meter enclosure shall be a minimum of

1" diameter and not longer than 50'-0". Conduit shall be RMC or IM C.

6. Supply side equipment bonding jumper shall be sized per NEC

250.102(C) with the exception that the minimum size allowed by

GVEA shall be #4 Cu. Equipment bonding jumper shall be run

continuous throughout service equipment.

7. Bond grounding electrode conductor to metal water pipe and other

available grounding electrodes as required by NEC 250.50

"Grounding Electrode System".

8. If grounding requirements of NEC 250.50 cannot be met, and made

electrodes are utilized as the sole type of grounding electrodes, then

the resistance requirements of NEC 250.53(A)(2) shall be met.

Electrodes may be directly bonded together with grounding electrode

conductor, individually routed to the neutral bus, or connected to an

optional terminal bus as stated in note 18. A ground rod is required

by GVEA even if a metal water pipe or other electrodes listed in

NEC 250.50 are used.

9. Grounding electrode conductors sized per NEC 250.66 with minimum

size to be #4 Cu in accordance with GVEA requirements. For specific

service entrance, see approved GVEA load data for minimum

permissible grounding electrode conductor size. See note 18 for

another grounding electrode bonding jumper connection option.

Grounding conductors shall be continuous as per NEC 250.64(C) and

protection from physical damage as per NEC 250.64(B).

10. Use #4 Cu conductor to bond CT meter enclosure. CT meter bonding

conductor shall be continuous between bonding points.

11. All neutral buses shall be effectively bonded to enclosures in

accordance with NEC 250.92. Install separate grounding lug in

enclosure if neutral bus is not directly bonded to enclosure. Factory

supplied neutral bus bonding means are subject to approval.

12. Per NEC 250.12 and 250.96, paint shall be removed from surfaces in

contact with grounding fittings. Exposed metal at ground points shall

be protected with conductive corrosion inhibitor.

13. Supply-side bonding jumpers and CT meter bonding conductor shall

be routed through the conduit. Each end of the conduit shall be

bonded as required by GVEA.

14. It is the member's responsibility to phase mark paralleled conductors

in an easily visible manner. High leg of delta services shall be

identified ORANGE per NEC 110.15.

15. Threadless couplings and connectors are not allowed for bonding

service equipment. OZ Gedney Type CHM-T or similar UL listed with

piercing screw approved for bonding are acceptable for bonding

conduit to enclosures and may be substituted for conduit bonding

bushings. Standard locknuts, sealing locknuts, or grounding

wedges are not acceptable for bonding at service equipment.

16. Compression or screw-type connectors are acceptable means of

splicing conductors. Split bolt type are not allowed.

17. Service equipment shall be marked to identify it as being suitable for

use as service equipment.

18. Optional terminal bus can be added to connect bonding jumpers from

multiple grounding electrodes. Optional terminal bus shall be

effectively bonded to enclosure. A grounding electrode conductor

shall connect the optional bus with the neutral bus and it shall be

sized as per NEC 250.66.

19. Equipment grounding conductor (EGC) to distribution panel(s)

required. See NEC 250.32(B).

20. Service equipment shall be marked with the available fault current

and date calculated according to NEC 110.24.

METER ENCLOSURE

WITH SOLID TOP

AND NO HOLE FOR

HUB ATTACHMENT

GROUND ELECTRODE


(with parallel entrance conductors)(with separate meter enclosure)

TO APPROVED GROUND

SEE GROUNDING DETAIL

ON PAGE 26

TO APPROVED GROUND


ON PAGE 26

METER

ENCLOSURE

CT ENCLOSURE

DISCONNECT

ENCLOSURE

METER

ENCLOSURE

CT ENCLOSURE

DISCONNECT

ENCLOSURE

5'-0" MIN.

6'-0" MAX.

METER ENCLOSURE WITH

SOLID TOP AND NO HOLE

FOR HUB ATTACHMENT

OVERHEAD SOURCE

SEE NOTES 3, 4, & 14

SEE NOTE 2

SEE NOTE 4

SEE NOTE 12

5'-0" MIN.

6'-0" MAX.

SEE NOTES 3, 4, & 5

BONDING JUMPER

SEE NOTE 15


SEE NOTE 10

UNDERGROUND SOURCE

SEE NOTE 12

SEE NOTES

13 & 15 TYP.

EQUIPMENT BONDING

JUMPER -SEE NOTE 6

MAX. HEIGHT

TO CENTER OF

HANDLE 6'-7"

TO LOAD

BONDING

JUMPER

NEUTRAL BUS

-SEE NOTE 11 & 12

SEE NOTE

12 & 18

SEE NOTE 12

SEE NOTE 10

SEE NOTE 12

SEE NOTES

3, 4, & 5

SEE NOTE 2

SEE NOTE 4

OVERHEAD SOURCE -SEE NOTES 3, 4, & 14

EQUIPMENT

BONDING

JUMPER

-SEE NOTE 6

BUSHING LUGS

-SEE NOTE 13 &

15 TYP.

SEE NOTE 12

SEE NOTES

12 & 18

NEUTRAL BUS

-SEE NOTES 11 & 12

MAX. HEIGHT

TO CENTER OF

HANDLE 6'-7"

GROUNDING ELECTRODE


UNDERGROUND SOURCE


GROUNDING ELECTRODE

SYSTEM -SEE NOTES 7 & 8

GROUNDING ELECTRODE

SYSTEM -SEE NOTES 7 & 8

TO LOAD

FINAL GRADE


UNDERGROUND OR OVERHEAD SERVICE UNDERGROUND OR OVERHEAD SERVICE

REVISED 03/2020


1

L

2

L

N

2

L

L

1

N

E

G

C

WATER PIPE -SEE NOTES 2 & 6

GROUND ROD(S)

GROUND RING

BUILDING STEEL


Grounding Details

(Meter Located on Building Being Served)

1. Bond grounding electrode conductor to metal water pipe

and other available grounding electrodes as required by

NEC 250.50 "Grounding Electrode System".

2. The grounding connection to a metal water pipe shall be

within 5'-0" of the point where the water pipe enters the

structure. A water pipe that is used for grounding shall be

buried in the earth for a minimum of 10'-0" of it's length.

3. All possible grounding configurations could not be shown.

All grounding shall comply with article 250 of the NEC. It

is recommended to bond the grounding electrode

jumpers to a grounding bus in the enclosure or to the

grounding electrode conductor. Pipe connections may

become corroded and compromise the integrity of the

grounding system.

4. Threadless couplings and connectors are not allowed for

bonding service equipment. OZ Gedney Type CHM-T or

similar UL listed with piercing screw approved for bonding

are acceptable for bonding conduit to enclosures and

may be substituted for conduit bonding bushings.

Standard locknuts, sealing locknuts, or grounding

wedges are not acceptable for bonding at service

equipment.



conduit.



7. In the absence of a metallic water pipe in direct contact

with the earth a well casing may be used as a grounding

electrode in place of the water pipe provided that the well

casing meets all the requirements of NEC 250.52(A)(1)

for direct earth contact of 10'-0".

8. If the grounding electrode system consists of only one

ground rod or set of ground rods as required by NEC

250.53(A)(2), the grounding electrode conductor shall be

sized as per NEC Table 250.66. When additional

grounding electrodes are employed the sole grounding

electrode conductor to the ground rod can be reduced in

size to a minimum #4 AWG Cu conductor.

ADDITIONAL 8'-0" x 5/8" DIAMETER MIN. COPPER

CLAD GROUND ROD (IF FIRST ROD IS ONLY

GROUNDING ELECTRODE -SEE NEC 250.53(A)(2))


-SEE NOTES 1 & 3 ON PAGE 26

-SEE NOTE 8 ON PAGE 25

CONTINUOUS GROUNDING ELECTRODE

CONDUCTOR TO GROUND ROD -SEE NOTE 7

IRREVERSIBLE

COMPRESSION

CONNECTOR


MIN. #4 OR #2 AWG COPPER

-SEE NOTES 8 & 9 ON PAGE 25

4-WIRE FEEDER TO DISTRIBUTION PANEL

GROUNDING BLOCK SHALL BE PERMANENTLY

BONDED TO ENCLOSURE

COMBINATION RAINTIGHT

METER AND SERVICE ENCLOSE

SERVICE ASSEMBLY

MAIN BREAKER OR DISCONNECT AND FUSES

-SEE NOTE 4

SERVICE

100 Amp

200 Amp

SIZE

Copper

Copper

MINIMUM

GROUNDING

#4

#4


#2

#3/0

Copper

Copper

1 1/4"

2"

ELECTRODE

CONDUCTOR

SIZE

Copper

Copper

EQUIPMENT

#8

#6

GROUNDING

CONDUCTOR

SIZE

300 Amp

Copper

#2300 kcmil

Copper

2"

Copper

#4

MINIMUM

8'-0" x 5/8" DIAMETER MIN. COPPER CLAD GROUND

ROD TYP.

SEALING LOCK NUT & BONDING BUSHING

6'-0"

MIN.




REVISED 03/2020


MINIMUM

CONDUIT

SIZE (RMC

OR IMC)

MINIMUM

WIRE SIZE

(USE, XHHW,

OR RHW)*

L

N

1

2

L

G

N

L

1

L

2

G

L

2

1

L

N

EGC

EGC

Grounding Details

(Pole or Post Mounted Meter)




2. The grounding connection to a metal water pipe shall be

within 5'-0" of the point where the water pipe enters the

structure. A water pipe that is used for grounding shall be

buried in the earth for a minimum of 10'-0" of it's length.

3. All possible grounding configurations could not be shown.

All grounding shall comply with article 250 of the NEC. It

is recommended to bond the grounding electrode jumpers

to a grounding bus in the enclosure or to the grounding

electrode conductor. Pipe connections may become

corroded and compromise the integrity of the grounding

system.




are acceptable for bonding conduit to enclosures and may

be substituted for conduit bonding bushings. Standard

locknuts, sealing locknuts, or grounding wedges are

not acceptable for bonding at service equipment.



conduit.



7. In the absence of a metallic water pipe in direct contact

with the earth a well casing may be used as a grounding

electrode in place of the water pipe provided that the well

casing meets all the requirements of NEC 250.52(A)(1)

for direct earth contact of 10'-0".

8. If the grounding electrode system consists of only one

ground rod or set of ground rods as required by NEC

250.53(A)(2), the grounding electrode conductor shall be

sized as per NEC Table 250.66. When additional

grounding electrodes are employed the sole grounding

electrode conductor to the ground rod can be reduced in

size to a minimum #4 AWG Cu conductor.

ADDITIONAL 8'-0" x 5/8" DIA. MIN.

COPPER CLAD GROUND ROD (IF

FIRST ROD IS ONLY GROUNDING

ELECTRODE -SEE NEC 250.53(A)(2))


-SEE NOTES 1 & 3

-SEE NOTE 8 ON PAGE 25

CONTINUOUS GROUNDING

ELECTRODE CONDUCTOR

TO GROUND ROD

-SEE NOTE 7

IRREVERSIBLE

COMPRESSION

CONNECTOR


MIN. #4 OR #2 AWG COPPER -SEE TABLE

BELOW AND NOTES 8 & 9 ON PAGE 25

4-WIRE FEEDER TO DISTRIBUTION

PANEL

ISOLATED NEUTRAL BUS BAR

COMBINATION RAINTIGHT METER

AND SERVICE ENCLOSE

LOCK NUT & BONDING BUSHING

GROUNDING BLOCK SHALL

BE PERMANENTLY BONDED

TO ENCLOSURE

FROM GVEA

POWER SYSTEM

WATER PIPE -SEE NOTES 2 & 6


GROUND RING

BUILDING STEEL

8'-0" x 5/8" DIA. MIN.

COPPER CLAD

GROUND ROD TYP.

SEALING LOCK NUT & BONDING

BUSHING

6'-0"

MIN.

GROUND ROD CLAMP

SERVICE DISCONNECT EQUIPMENT

SHALL BE LOCATED WHERE

CONDUCTORS ENTER THE BUILDING

CIRCUIT BREAKER OR SWITCH

AND FUSES

MAIN BREAKER

GROUNDING ELECTRODE


ON PAGE 25

CONDUCTORS IN

CONDUIT OR

DIRECT BURY


SERVICE

100 Amp

200 Amp

SIZE

Copper

Copper

MINIMUM

GROUNDING

#4

#4


WIRE SIZE

MINIMUM

#2

#3/0

Copper

Copper

1 1/4"

2"

(USE, XHHW,

ELECTRODE

CONDUCTOR

SIZE

Copper

Copper

EQUIPMENT

#8

#6

GROUNDING

CONDUCTOR

SIZE

300 Amp

Copper

#2300 kcmil

Copper

2"

Copper

#4

OR RHW)*

MINIMUM


REVISED 03/2020

GROUND ROD


MINIMUM

CONDUIT

SIZE (RMC

OR IMC)

AutoCAD SHX Text

N

AutoCAD SHX Text

EGC

SERVICE ENTRANCE BUSWAY

FINAL GRADE

TO APPROVED GROUND

SEE GROUNDING

DETAIL ON PAGE 26

FINAL GRADE

SERVICE ENTRANCE WIREWAY

TO APPROVED GROUND


ON PAGE 26

Grounding Details

(Multiple Metered Service without Main Disconnect)

REVISED 03/19

(Multiple Metered Service without Main Disconnect, Alternate)


-SEE NOTES 7 & 8

NEUTRAL BUS NEUTRAL BUS NEUTRAL BUS

GROUNDING ELECTRODE



-SEE NOTES 7 & 8

MAIN BONDING JUMPER

5'-0" MIN.

6'-0" MAX.

MAX. HEIGHT

TO CENTER OF

HANDLE 6'-7"

EQUIPMENT BONDING JUMPER

-SEE NOTES 16 & 23 TYP.

UNGROUNDED SOURCE

SEE NOTES

4, 5, & 6 TYP.

EQUIPMENT

BONDING

JUMPER -SEE

NOTE 12

SEE NOTE 15

TYP.

GROUNDED SERVICE

CONDUCTOR (NEUTRAL)

-SEE NOTE 10

NEUTRAL BUS

-SEE NOTES 14 & 15

SEE NOTE 22 SEE NOTE 22

SEE NOTE 22

SEE NOTE 22

SEE NOTES 4,

5, 6, & 16 TYP.

EQUIPMENT BONDING

JUMPER -SEE NOTE 12

SEE NOTE

15 TYP.

GROUNDED SERVICE

CONDUCTOR (NEUTRAL)

-SEE NOTE 11 TYP.

SEE NOTES

1 & 2

GROUNDED SERVICE

CONDUCTOR

(NEUTRAL) -SEE

NOTE 11 TYP.

SEE NOTES 1 & 2

SEE NOTE 3 TYP.

MAX. HEIGHT

TO CENTER OF

HANDLE 6'-7"

5'-0" MIN.

6'-0" MAX.

MAIN BONDING

JUMPER

SEE NOTES 4,

5, 6, & 16 TYP.

GROUNDING ELECTRODE


EQUIPMENT BONDING JUMPER

-SEE NOTES 13 & 16 TYP.

UNGROUNDED SOURCE

SEE NOTES 4, 5,

& 6 TYP.

NEUTRAL BUS

-SEE NOTES

14 & 15 TYP.

SEE NOTE 15

TYP.

NEUTRAL BUS -SEE NOTE 14 & 15

GROUNDED SERVICE

CONDUCTOR

(NEUTRAL)

-SEE NOTE 10

EQUIPMENT

BONDING JUMPER

-SEE NOTE 12

NOTES FOLLOW ON PAGE 29


Grounding Details

Notes for Multiple Metered Service Details

1. All service enclosures shall be NEMA 3R outdoor type.

Hubs exposed to weather shall be rated weather tight.

2. All equipment before meter shall be sealable. Hubs and

hub covers shall not be removable from exterior of can.

3. Compression or screw type connectors are an acceptable

means of connecting conductors to bus bar.

4. This conduit shall be continuous. No junction boxes or

conduit bodies are permitted.

5. These conduits shall be Rigid Metal Conduit (RMC) or

Intermediate Metal Conduit (IMC) and sized in

accordance with NEC 344.22 for RMC and 342.22 for

IMC. No compression fittings shall be accepted. Sealing

locknuts shall be installed on conduits penetrating outdoor

enclosures.




are acceptable for bonding conduit to enclosures and may

be substituted for conduit bonding bushings. Standard

locknuts, sealing locknuts, or grounding wedges are

not acceptable for bonding at service equipment.




8. If grounding requirements of NEC 250.50 cannot be met,

and made electrodes are utilized as the sole type of

grounding electrodes, then the resistance requirements of

NEC 250.53(A)(2) shall be met. Electrodes may be

directly bonded together with grounding electrode

conductor or individually routed to the neutral bus. A

ground rod is required by GVEA even if a metal water

pipe or other electrodes listed in NEC 250.50 are used.

9. Grounding electrode conductor sized in accordance to

NEC 250.66 with minimum size to be #4 Cu in

accordance with GVEA requirements. For specific service

entrance, see approved GVEA load data for minimum

permissible grounding electrode conductor size. #4 Cu

may be used when made electrodes are the sole type of

grounding electrodes. Grounding conductors shall be

continuous as per NEC 250.64(C) and protection from

physical damage as per NEC 250.64(B).

10. Grounded service conductor sized in accordance to

maximum diversified service demand and NEC 250.24(C)

with minimum size to be #4 Cu according to GVEA

requirements. Grounded service conductor shall be

continuous from service point throughout service

equipment to the neutral bus connection point.

11. Individual grounded service conductors sized in

accordance to individual diversified service demand and

NEC 250.24(C) with minimum size to be #4 Cu according

to GVEA requirements. Individual grounded service

conductors shall be continuous from the busway neutral

bus throughout service equipment to the equipment

neutral bus.

12. Equipment bonding jumper sized in accordance to NEC

250.28(D) with minimum size to be #4 Cu according to

GVEA requirements. Equipment bonding jumper to be

continuous throughout service equipment.

13. Individual equipment bonding jumpers sized in

accordance to individual disconnect ungrounded

conductor sizes and to NEC 250.28(D) with minimum size

to be #4 Cu according to GVEA requirements. Bonding

jumpers to be continuous throughout service equipment

with the exception of the individual disconnect taps.

14. Neutral bus to be effectively bonded to enclosure in

accordance with NEC 250.96. Install separate grounding

lug in enclosure if neutral bus is not directly bonded to

enclosure. Factory supplied neutral bus bonding means

are subject to approval.

15. Per NEC 250.12 and 250.96, paint shall be removed from

surfaces in contact with grounding fittings. Exposed metal

at ground points shall be protected with conductive

corrosion inhibitor.

16. Equipment bonding jumper shall be routed through

the conduit, and each end of the conduit shall be

bonded.

17. It is the member's responsibility to phase mark paralleled

conductors in an easily visible manner. High leg of delta

services shall be identified ORANGE per NEC 110.15.

18. Service equipment shall be marked to identify it as being

suitable for use as service equipment.


20. Equipment grounding conductor (EGC) to distribution

panel(s) is required. See NEC 250.32(B).


means of tapping the individual equipment bonding

jumpers. Size of equipment bonding jumpers shall

conform to NEC 250.28(D).


means of tapping the grounded service conductor

(neutral).

23. Individual equipment bonding jumpers sized in

accordance to individual disconnect ungrounded

conductor sizes and to NEC 250.28(D) with minimum size

to be #4 Cu according to GVEA requirements. Individual

equipment bonding jumpers to be continuous from tap

throughout service equipment.


REVISED 03/2020


1

2

3

1

23

BKOR

1 32

N

2

1

R W BR W

1 2

OR

1

WBKBU R W

2 3 1N

N

3

2

1

Y W BR W

2 3 3

BKOR BU

21

W R W Y

N 1 2

N

2

3

1

WBRW

3

Metering

Meter Socket for Current Transformer

and Connection Diagram

(Dot indicates location of

polarity mark on instrument

transformers relative to the

supply system.)

1. Potential transformers are required for

service voltages above 480V.

2. Meter base enclosure for any of the

above metering configurations shall

include provisions for a GVEA provided

test switch.

3. GVEA shall provide the CT's for the

member's contractor to mount for

services of 1200 Amps or less. For

services over 1200 Amps, CT's shall be

provided by the manufacturer with the

switchgear. GVEA shall provide and

install the test switch and wire the CT's,

test switches, and meter base.

4. As required by NEC 110.15 the phase

conductor in the service entrance having

the higher voltage to ground shall be

identified by the color ORANGE, and be

located on the right hand lug of the

meter base. (4-wire delta only)

5. If grounding requirements of NEC

250.50 cannot be met, and made

electrodes are utilized as the sole type

of grounding electrodes, then the

resistance requirements of NEC

250.53(A)(2) shall be met. Electrodes

may be directly bonded together with

grounding electrode conductor,

individually routed to the neutral bus, or

connected to an optional terminal bus as

stated in note 6. A ground rod is

required by GVEA even if a metal

water pipe or other electrodes listed




grounding electrodes. Optional terminal

bus shall be effectively bonded to

enclosure. A grounding electrode

conductor shall connect the optional bus

with the neutral bus and it shall be sized

as per NEC 250.66.

LEGEND:

CURRENT TRANSFORMER

THREE-PHASE SUPPLY SYSTEM

DELTA

WYE

TEST

SWITCH

TEST

SWITCH

TEST

SWITCH


REVISED 03/2020

13 Terminal

3 Current Transformers

4 Wire WYE

277/480V, 3Ø, 4W

120/208V, 3Ø, 4W

TYPE OF SERVICE

TERMINAL

TYPE OF SERVICE

TERMINAL

120/240V, 3Ø, 4W

240/480V, 3Ø, 4W

4 Wire DELTA, see note 4


13 Terminal6 Terminal


3 Wire

240/480V, 1Ø, 3W

120/240V, 1Ø, 3W

TYPE OF SERVICE

TERMINAL

FIGURE 3FIGURE 2FIGURE 1


1. Manual bypass sockets are not allowed

unless specifically approved by GVEA

prior to installation.

2. As required by NEC 110.15 the phase

conductor in the service entrance

having the higher voltage to ground

shall be identified by the color

ORANGE, and be located on the right

hand lug of the meter base (4-wire

delta only).

3. If grounding requirements of NEC

250.50 cannot be met, and made

electrodes are utilized as the sole type

of grounding electrodes, then the

resistance requirements of NEC

250.53(A)(2) shall be met. Electrodes

may be directly bonded together with

grounding electrode conductor,

individually routed to the neutral bus,

or connected to an optional terminal

bus as stated in note 4. A ground rod

is required by GVEA even if a metal

water pipe or other electrodes listed




grounding electrodes. Optional terminal

bus shall be effectively bonded to

enclosure. A grounding electrode

conductor shall connect the optional

bus with the neutral bus and it shall be

sized as per NEC 250.66.

5. Socket for 300A self-contained meter

shall conform to all requirements of the

4 terminal meter socket. In addition, it

shall be rated for 300A, have a bypass

lever, and the upper right hand jaw

must be reduced or have an

anti-inversion clip installed to prevent

the insertion of a 200A meter. The

meter enclosure must be the ringless

type to accommodate the required

meter bypass lever.

6. Meter bypass provisions are optional

on 200 Amp, three-phase, seven jaw

meter bases.

FIGURE 5

FIGURE 6

REDUCED OR

CLIP INSTALLED

-SEE NOTE 5

FIGURE 7

5 TERMINAL

TYPE OF SERVICE

· 120/208V, 3W Network

· 240V, 3Ø, 3W, Delta

· 480V, 3Ø, 3W, Delta

4 TERMINAL

TYPE OF SERVICE

· 120/240V, 1Ø, 3W

· 240/480V, 1Ø, 3W

4 TERMINAL (300 Amp)

TYPE OF SERVICE

· 120/240V, 1Ø, 3W, 300A

7 TERMINAL

TYPE OF SERVICE

· 120/208V, 4W, Wye

· 277/480V, 3Ø, 4W, Wye

· 120/240V, 3Ø, 4W, Delta

See note 2

· 240/480V, 3Ø, 4W, Delta

See note 2

· See note 6 for optional

bypass provisions

METER BYPASS

LEVER -SEE

NOTE 5

Metering

Self-Contained Meter Sockets (100 to 300 Amps)

FIGURE 4

REVISED 03/2020



6

"

m

i

n

.

1. Most items on this page will be furnished by GVEA. An approved

Overhead Line Contractor, determined and contracted by GVEA,

shall perform all work shown. An applicable Electrical

Administrator License is required to perform supporting work not

shown on this document. See page titled 'Three-Phase

Transformer Vault Notes' for more detailed information.

2. Use additional couplings and nipples as required for 3'-6" conduit

depth and positioning.

3. Install pull line in primary conduits and cap both ends.

4. Finished top elevation of pad shall be 6" above final grade and not

subject to seasonal flooding.

5. Any conduit entering the side of the vault shall utilize precast

knock-outs.

6. Use 2" conduit for single phase installation. Use 4" conduit for

three phase installation. Conduits installed which are not plumb

shall not be accepted.

7. Slope all underground conduits 1/4" per 10'-0" minimum towards

vault.

8. All sweeps, elbows (above or below grade), and conduit above

grade shall be galvanized rigid metal conduit. PVC conduit shall

NOT be accepted in primary runs. Conduit runs of HDPE shall be

of the same manufacturer. The contractor is responsible for

removing all ridges created inside the HDPE joints. All materials

shall be listed for use.

9. Install first 3'-0" conduit stick on pole for inspection. Conduits

which are not plumb shall not be accepted.

10. Bollards are required to protect the transformer if placed near

vehicular traffic areas.

11. The member's contractor shall provide a tented and heated area

for pulling and terminating conductors for underground

installations when the temperature is less than +20°F. The heating

source will be an indirect fired system. Contact GVEA's New

Construction section for more information.

12. GVEA shall terminate all transformer secondary connections.

13. Engineering approval is required for more than 5 secondary runs.

Primary Riser Conduit Details

For Transformer Pads 14'-0" From Pole

(Length and routing to be approved by GVEA)

SEE PAGE 34 FOR SINGLE-PHASE

BOX PAD DETAIL. SEE PAGE 36

FOR THREE-PHASE, VAULT

DETAIL, AND FILL MATERIAL

SPECIFICATIONS

FINAL GRADE

CLIMBING ZONE.

NO EQUIPMENT

PLACED IN THIS AREA.

LEAVE TRENCH OPEN FOR INSPECTION

TYPE OF

INSTALLATION

1 Phase

3 Phase

THREADED MALLEABLE UNILETS

Appleton Electric Co. (or Equal) Catalog No.

C 200-M (2")

C 400-M (4")

6"

GALVANIZED RIGID CONDUIT PIPE CAP

-SEE NOTES 3 & 6

CAP ENDS OF CONDUIT

-SEE NOTES 3 & 6


BOX PAD DETAIL AND PAGE 36

FOR THREE-PHASE PAD DETAIL

6"-12"

GALVANIZED RIGID METAL OR HDPE

(ELECTRICAL CONDUIT LISTED TO UL 651A)

CONDUIT SLOPED TO DRAIN TO VAULT


ONE SET OF STAND-OFF BRACKETS PER

POLE, SIZED AS REQUIRED AND NOT PLACED

IN THE CLIMBING ZONE. STAND-OFF

BRACKETS TO BE ROTATED 45° FROM

CENTERLINE -SEE PAGE 18 FOR DETAILS

GALVANIZED RIGID

METAL ELBOW

-SEE NOTE 8

GROUND ROD AND

POLE GROUND

CONDUCTOR

PROVIDED BY GVEA

6"


CONDUIT, 10'-0" LENGTHS



CONNECTOR

STAND-OFF BRACKETS SIZED

AS REQUIRED -SEE PAGE 18

FOR DETAILS


CONDUIT AND PIPE CAP

-SEE NOTES 3 & 6

GROUNDING BUSHING PROVIDED

BY MEMBER. BOND CONDUIT TO

POLE GROUND.

3'-0"

CAUTION TAPE 6" FROM FINAL

GRADE. RUN THE FULL

LENGTH OF THE CONDUIT RUN.

3'-6" MIN.


REVISED 03/2020


6

"

m

i

n

.

1. Most items on this page will be furnished by GVEA. An approved

Overhead Line Contractor, determined and contracted by GVEA,

shall perform all work shown. An applicable Electrical Administrator

License is required to perform supporting work not shown on this

document. See page titled 'Three-Phase Transformer Vault Notes'

for more detailed information.

2. Use additional couplings and nipples as required for 3'-6" conduit

depth and positioning.

3. Install pull line in primary conduits and cap both ends.

4. Finished top elevation of pad shall be 6" minimum above final grade

and not subject to seasonal flooding.

5. Any conduit entering the side of the vault shall have the bottom

outside edge of the conduit a minimum of 6" above the vault floor.

6. Drainage conduit shall be installed at the lowest point of the conduit

run, using a 1'-0" deep pea gravel sump. At drainage point,

installation shall have either HDPE with sufficient number of 1/4in

holes or Unilet with cover removed; both shall be wrapped in

GeoTech wrap. This installation shall be inspected by GVEA before

backfilling.

7. Use 2" conduit for single phase installation. Use 4" conduit for three

phase installation. Conduits installed which are not plumb shall not

be accepted.

8. Slope all underground conduits 1/4" per 10'-0" minimum towards

drainage point or vault.

9. All sweeps, elbows (above or below grade), and conduit above

grade shall be galvanized rigid metal conduit. PVC conduit shall

NOT be accepted in primary runs. Conduit runs of HDPE shall be

of the same manufacturer. The contractor is responsible for

removing all ridges created inside the HDPE joints. All materials

shall be listed for use.

10. Conduit shall be stubbed out of ground 3'-0" for inspection.

Conduits which are not plumb shall not be accepted.

11. Bollards are required to protect the transformer if placed near

vehicular traffic areas.

12. The member's contractor shall provide a tented and heated area for

pulling and terminating conductors for underground installations

when the temperature is less than +20°F. The heating source will

be an indirect fired system. Contact GVEA's New Construction

section for more information.

13. GVEA shall terminate all transformer secondary connections.

14. Engineering approval is required for more than 5 secondary runs.

Primary Riser Conduit Details

For Transformer Pads More Than 14'-0" From Pole

(Length and routing to be approved by GVEA)


BOX PAD DETAIL. SEE PAGE 36

FOR THREE-PHASE, VAULT

DETAIL, AND FILL MATERIAL

SPECIFICATIONS

LEAVE TRENCH OPEN

FOR INSPECTION

CLIMBING ZONE.

NO EQUIPMENT

PLACED IN THIS AREA.

6"FINAL GRADE

GALVANIZED RIGID CONDUIT

PIPE CAPS -SEE NOTES 3 & 7

CAP ENDS OF CONDUIT -SEE NOTES 3 & 6

SEE PAGE 34 FOR SINGLE-PHASE BOX PAD DETAIL

AND PAGE 36 FOR THREE-PHASE PAD DETAIL

6"-12"

PEA GRAVEL

ONE SET OF STAND-OFF BRACKETS

PER POLE, SIZED AS REQUIRED AND

NOT PLACED IN THE CLIMBING ZONE.

STAND-OFF BRACKETS TO BE

ROTATED 45° FROM CENTERLINE

-SEE PAGE 18 FOR DETAILS

GALVANIZED RIGID

METAL ELBOW

-SEE NOTE 8

GROUND ROD AND

POLE GROUND

CONDUCTOR

PROVIDED BY GVEA

6"


CONDUIT -SEE NOTES 7,

9, & 10


CONNECTOR

STAND-OFF BRACKETS SIZED

AS REQUIRED -SEE PAGE 18

FOR DETAILS


CONDUIT AND PIPE CAPS

-SEE NOTES 3 & 7

GROUNDING BUSHINGS

PROVIDED BY MEMBER. BOND

CONDUIT TO POLE GROUND.

CAUTION TAPE 6" TO 1'-0"

FROM FINAL GRADE. RUN

THE FULL LENGTH OF

THE CONDUIT RUN.

3'-6" MIN.

1'-0"

DRAINING CONDUIT

-SEE NOTE 6

-SEE TABLE BELOW

GALVANIZED RIGID METAL OR HDPE (ELECTRICAL

CONDUIT LISTED TO UL 651A) CONDUIT SLOPED TO

DRAIN TO VAULT. -SEE NOTES 7, 8, & 9

DRAINING CONDUIT

-SEE NOTE 6

-SEE TABLE BELOW

3'-0"


REVISED 03/2020


TYPE OF

INSTALLATION

1 Phase

3 Phase

THREADED MALLEABLE UNILETS

Appleton Electric Co. (or Equal) Catalog No.

C 200-M (2")

C 400-M (4")

1. An applicable Electrical Administrator License is required

for all work associated with the installation of

Single-Phase Transformer Box Pads.

2. All gravel is contractor furnished, delivered, and installed.

Gravel shall be 3/4" minus D1. Use mechanical

compactor and proper construction techniques for

compaction of gravel base.

3. All neutral conductors and non-current carrying parts shall

be interconnected and grounded.

4. Transformer installation shall be entirely dead front. All

energized primary and secondary parts and termination

are to be insulated.

5. Provide sufficient length #4 bare Cu loop for grounding all

necessary equipment.

6. GVEA supplied Box Pad shall have means for fastening

transformer.

7. #4 bare copper ground pigtail for comm/tv/phone where

required. Length as required to connect comm/tv/phone

equipment.

8. Use of split-bolts is not allowed.

9. Conduit types other than RMC may be used with prior

GVEA written approval.

10. Bollards are required to protect the transformer if placed

near vehicular traffic areas.






more information.

12. GVEA supplied transformers require a minimum

separation to combustible construction of 25'-0". An

engineered solution is required if the transformer is placed

within 25'-0" of a structure. Reference NFPA 850 current

edition.

13. It is the owner's responsibility to identify underground

obstructions and initiate underground locates prior to

placing any new equipment. Location of customer

facilities approved by GVEA does not take into

consideration underground obstructions.

14. GVEA shall terminate all transformer secondary

connections.

15. Engineering approval is required for more than 5

secondary runs.

Single-Phase Transformer Box Pad Details

(For Transformers 15-167 kVA)

SEE NOTE 5

PRIMARY CONDUIT

DEPTH AS SPECIFIED

SLOPE 1/4" PER

FOOT MIN. TYP.

SECONDARY CONDUIT

DEPTH AS SPECIFIED

PRIMARY CONDUIT

10'-0" x 5/8" DIA. MIN. COPPER

CLAD GROUND ROD DRIVEN

10" FROM BOTTOM OF

EXCAVATION TYP.

SECONDARY CONDUIT

3/4" MINUS D1 FILL WITH

95% COMPACTION

4" MIN.

TYP.

SEE NOTE 7

TRANSFORMER TRANSFORMER

UNDISTURBED COMMON

FILL UNDER PAD TYP.

95% COMPACTION

OF ALL DISTURBED

COMMON BACK

FILL TYP.

TRANSFORMER BOX PAD

SIZED TO TRANSFORMER.

BOX PAD SUPPLIED BY

GVEA AND INSTALLED BY

CONTRACTOR. -SEE NOTE 5

2'-8" MIN.

3'-0" MAX.

4"

6" MIN.

SEE NOTE 5

6" MIN.

REVISED 03/2020

FRONT

SIDE VIEWFRONT VIEW


FRONT

6" MIN.


1. An applicable Electrical Administrator License is

required for all work associated with the installation of

Secondary Pedestals.

2. All gravel is contractor furnished, delivered, and

installed. Gravel shall be 3/4" minus D1. Use mechanical

compactor and proper construction techniques for

compaction of gravel base.

3. All neutral conductors and non-current carrying parts

shall be interconnected and grounded.

4. Provide sufficient length #4 bare Cu conductor loop for

grounding all necessary equipment.


6. Conduit types other than RMC may be used with prior

GVEA written approval.

7. Bollards are required to protect the transformer if placed

near vehicular traffic areas.






more information.

9. GVEA shall terminate all transformer secondary

connections.

10. Engineering approval is required for more than 5

secondary runs.



obstructions. It is the owner’s responsibility to call other



equipment.

Secondary Pedestal Details

SEE NOTE 4

SLOPE 1/4" PER

FOOT MIN. TYP.

LAND ALL GROUNDED SERVICE

CONDUCTORS ON TERMINAL

BLOCK -SEE NOTE 3

GVEA SUPPLIED,

CONTRACTOR INSTALLED

SECONDARY PEDESTAL

10'-0" X 5/8" DIA. MIN. COPPER

CLAD GROUND ROD DRIVEN

10" FROM BOTTOM OF

EXCAVATION TYP.

95% COMPACTION

OF ALL DISTURBED

COMMON BACK

FILL TYP.

3/4" MINUS D1

FILL WITH 95%

COMPACTION

SECONDARY CONDUITS

TO LOADS AS NEEDED

95% COMPACTION

OF ALL DISTURBED

COMMON BACK

FILL TYP.

FROM SECONDARY

SIDE OF PAD MOUNT

TRANSFORMER

UNDISTURBED COMMON

FILL UNDER PAD TYP.

1'-6"

3'-0"

APPROX.

6" MIN.

4" MIN.

TYP.

REVISED 03/2020

FRONT

FRONT VIEW SIDE VIEW


6"


FINAL GRADE

1. Conduits may enter the vault

enclosure from the bottom

depending on depth. See note

6 on page 37.

Three-Phase Transformer Vault Details

ALTERNATE SECONDARY CONDUIT

ENTRY

ALTERNATE PRIMARY

CONDUIT ENTRY

REVISED 03/2020

FRONT VIEW

PLAN VIEW

10'-0" X 5/8" DIA. MIN. COPPER CLAD

GROUND ROD DRIVEN 10" FROM

BOTTOM OF EXCAVATION TYP.

SECONDARY CONDUITS SHALL BE

INSTALLED PERPENDICULAR TO

VAULT WALL

PRIMARY CONDUITS TO ENTER THE

VAULT FROM THE FRONT HALF OF

THE TRANSFORMER VAULT

1 PRIMARY CONDUIT FOR PADS

14'-0" OR LESS FROM POLE

2 PRIMARY CONDUITS FOR PADS

GREATER THAN 14'-0" FROM POLE

3/4" MINUS D1, 95%

COMPACTED 6" LIFTS

PRIMARY CONDUITS

SECONDARY CONDUITS

95% COMPACTION OF

ALL DISTURBED

COMMON BACK FILL TYP.

DEPTH AS

SPECIFIED

FOR PRIMARY

CABLES

DEPTH AS

SPECIFIED FOR

SECONDARY

CABLES

6"

6"-12"

6"-12"

1'-0" MIN.

10'-0"

7'-0"

NOTES: See pages 3-7 for general

requirements

5'-0"


1. All gravel is contractor furnished, delivered, and

installed. The gravel pad shall be 3/4" minus D1. All

back filled material underneath the gravel pad shall be

structural fill. Use a mechanical compactor and proper

construction techniques for compaction of gravel base.

No disturbed common back fill shall be allowed.

2. All neutral conductors and non-current carrying parts

shall be interconnected and grounded. Provide

sufficient length #4 bare Cu pigtail for grounding all

necessary equipment.

3. Transformer installation shall be entirely dead front. All

energized primary and secondary parts and

terminations shall be insulated.

4. Vault enclosure sized to transformer shall be furnished

by GVEA for installation.


6. If any conduit enters the vault from the bottom, the

outside edge of the conduit shall be a minimum of 6"

above the vault floor. Conduit types other than RMC

may be used with prior GVEA written approval.

7. An applicable Electrical Administrator License is

required to perform all work associated with the

installation of transformer vault.

8. Installation of transformer vault and primary shall be

done by a GVEA approved contractor.

9. Transformer wiring and grounding details can be found

in GVEA's URD specifications book.

10. Where cable limiters are installed, adequate space for

this equipment and cable terminations shall be

provided. See page 7.

11. In vehicular traffic areas, bollards shall be required.


heated area for terminating conductors for




more information.

13. GVEA supplied transformers require a minimum

separation to combustible construction of 25'-0". An

engineered solution is required if the transformer is

placed within 25'-0" of a structure. Reference NFPA

850 current edition.

14. It is the owner's responsibility to identify underground

obstructions and initiate underground locates prior to

placing any new equipment. Location of customer

facilities approved by GVEA does not take into

consideration underground obstructions.

Three-Phase Transformer Vault Notes

REVISED 03/2020

GVEA Responsibility

- GVEA shall furnish vault, transformer, and primary

conductors, conduit, & termination bracket.

- GVEA shall terminate all transformer secondary

connections.

- GVEA will provide bollards, where necessary.

Contractor Responsibility

-Contractor shall initiate all locates.

-Contractor will install vault, transformer, primary

conductors, conduit, and overhead termination

bracket.

-All vault installations shall have two compaction tests

on base layer under vault completed by a third-party

testing facility. Certified test results shall be submitted

to GVEA meeting 95% compaction.

-Contractor will terminate primary connections.

-Contractor will install secondary conduit, conductors

and associated hardware, unilets (or other means of

drainage), D1 gravel, and other materials not

supplied by GVEA.

-Bollards shall be installed in vehicle traffic areas.

General

-If the transformer is over 14'-0" from the primary pole,

GVEA will provide primary materials at no charge.

-If the transformer is over 14'-0" from the primary pole,

GVEA will provide primary materials at the current

rate beyond 14'-0" and to the transformer.

Note

- Primary and Secondary wire in vault shall be racked.

Installation Obligations



Primary Metering

1. Member's fused disconnect may be used as an air break

isolating switch. Fuse size to be specified by GVEA to

coordinate with GVEA equipment.

2. Fuse sized to protect GVEA system and coordinate with

member's fuse. See note 1.

EXISTING GVEA PRIMARY POLE LINE


REVISED 03/19

FOR GENERAL ARRANGEMENT INFORMATION ONLY

FINAL GRADE

GVEA'S DISCONNECT

-SEE NOTE 2

PRIMARY LINE

GVEA POLE

MEMBER'S FUSED

DISCONNECT

-SEE NOTE 1

PRIMARY

METERING

EQUIPMENT

30'-0"

GVEA OWNED

MEMBER

OWNED

POINT OF

SERVICE

MEMBER'S POLE

TO MEMBER'S

PRIMARY

50'-0"

GVEA OWNED


The table below shows the assumed % impedance and phase angle for distribution transformers

on the transformer base. Where fault current involves only one-half of the low voltage windings,

the % impedance values, based on full rated kVA, are 1.5 and 1.2 times the full winding %R and

%X respectively. An infinite bus is assumed on high side of the transformer.

Transformer Impedance Values

(For use in fault current calculations)


Single Phase Padmount or Overhead Transformer or Three Phase Overhead Bank

Transformer Size

[kVA/phase]

5

10

15

25

37.5

50

75

100

150

167

250

333

500

% Impedance*

[%Z]

2.1

1.6

1.6

1.6

1.6

1.6

1.6

1.6

1.7

1.7

1.7

1.7

1.7

Phase Angle

[Degrees]

30

30

40

45

45

52.5

52.5

60

60

60

60

60

60

% R+jX

[% Z]

1.819+j1.050

1.386+j0.800

1.226+j1.028

1.131+j1.131

1.131+j1.131

0.974+j1.269

0.974+j1.269

0.800+j1.386

0.850+j1.472

0.850+j1.472

0.850+j1.472

0.850+j1.472

0.850+j1.472

Three Phase Padmount Transformer

Transformer Size

[kVA/phase]

45

75

112.5

150

225

300

500

750

1000

1500

2000

% Impedance*

[%Z]

1.6

1.6

1.6

1.6

1.6

1.6

1.53**

5.18**

5.18**

5.18**

5.18**

Phase Angle

[Degrees]

40

45

45

52.55

52.55

60

60

60

60

60

60

% R+jX

[% Z]

1.226+j1.028

1.131+j1.131

1.131+j1.131

0.974+j1.269

0.974+j1.269

0.800+j1.386

0.765+j1.325

2.590+j4.486

2.590+j4.486

2.590+j4.486

2.590+j4.486

* % Impedance is based on RUS Guide 61-14.

** % Impedance is based on minimum values for three-phase distribution transformers as listed in section 7.1 of

ANSI C57.12.34-2004 and tolerances for impedance as defined in section 9.2 of ANSI C57.12.00-2006.

Site Plan

Site plan shall include property lines; location of structure to be served by utility with respect to the

property lines; location of service entrance equipment; location of GVEA transformer pole that is to

serve your structure; distance between GVEA transformer pole and your service entrance equipment.

Connected Load

This is the total connected load in kilovolt-amps (kVA) computed per the current addition of the

National Electric Code.

Motors and Starters: GVEA conducts a motor starting study for motors 10 horsepower and larger. If

the load contains motor(s) rated 10 horsepower or larger, then the following

data is required for each motor:

· Rated horsepower

· NEC locked-rotor indicating code letter

· Voltage

· Indicate whether single phase or three phase

· Indicate motor starting method (full voltage, reduced voltage [auto

transformer], or drive)

· Indicate motor starting and running sequence for multiple motors

Diversified Demand

If the load is a dwelling type load, then the demand (in kilowatts) shall be the load computed per the

current edition of the National Electric Code. It shall include a calculation for the individual dwelling

units as well as the total load on the service equipment.

For other type loads, the demand (in kilowatts) shall be a knowledgeable estimate by a registered

electrical engineer of the maximum load over a 15-minute time interval.

Load and Print Information Required by GVEA


Electrical Print

Include a one-line diagram AND riser diagram of service equipment from service entrance conductors

through the main disconnect and describing all physical details of installation. Refer to Electrical

Service One-Line (Relevant to your service, located on pages 42, 43, 44).

· Conductors and conduits – type, insulation, size, and number

· Over-current Device(s) and Equipment AIC rating

· Meter(s) – including numbering system

· Equipment Bonding and Grounding – per NEC and GVEA Electrical Service Entrance

Requirements

· Sealing Provisions – All access to unmetered conductors or bussing shall have

provisions for installing split/lock seals in accordance with GVEA Service Security

Equipment Sealing program. All meter retaining rings shall be the screw type. More

detailed information is available on request.

Revised 3/2020

WO#


Golden Valley Electric Association, Inc.

Cover Sheet

Electrical Load Data and Electrical Print

Application Name: Telephone:

Business Name: Telephone:

Mailing Address:

New Service Location:

Architect/Engineer: Telephone:

Electrical Contractor: Telephone:

Mailing Address: License #:

Service Requested:Volts: Phase: Amps: Configuration (Y or Δ)

The Association has adopted the National Electrical Code (NEC) as the minimum standard acceptable for

electrical installations it serves. The member should be aware that in addition to NEC requirements there

may be more stringent requirements imposed by the Association.

Golden Valley requires a detailed electrical print and detailed listing of the electrical load by a registered

electrical engineer or licensed electrical contractor on all multi-residential, commercial and industrial services.

Please ensure all applicable information required on the list below is attached to this cover sheet.

Checklist of Required Information

Site Plan

Connected Load

Motors and Starters

Diversified Demand

Electrical Print

Electrical Service One-Line (Relevant to your

service, located on pages 42, 43, 44)

Conductors and Conduits

Over-Current Device(s)

Meter(s) (to include numbering system)

Equipment Bonding and Grounding

Sealing Provisions

Reduced Neutral Calculations

When you have submitted the required information, Golden Valley will prepare a “Service Entrance Equipment

Requirement” sheet. A copy of this sheet will be sent to the applicant. DO NOT ORDER equipment prior to

receiving this “Service Entrance Equipment Requirement” sheet.

Load and Print Data Submitted by: Date:

Load and Print Data Received by: Date:

GVEA USE ONLY

Notes:

TO MEMBER EQUIPMENT

SERVICE

DISCONNECT

METER

ENCLOSURE

TO GVEA TRANSFORMER

TO GVEA TRANSFORMER

WATER PIPE

GROUND ROD

GROUND RING

BUILDING STEEL


[AMPS]

Overcurrent Device Rating

Three Phase: DeltaWye

FuseCircuit Breaker

Concrete Encased Electrode:

Overcurrent Device Interrupt Rating [AIC]

Additional Ground Rod if necessary per NEC250.53(A)(2):

Member Name

Service Location

Date

Prepared By

WO #

Service Lateral Conductors (Underground Service)

Number of Conduit Runs

Conduit Size

Conduit Type:

Phase Conductor Size

Neutral Conductor Size

Conductor Length

Conductor Insulation:

RMC IMC

[IN]

HDPE

[AWG]

[AWG]

[FT]

XHHW RHW USE

Grounding Electrode Conductor

Grounding Electrode System (Check all that apply)

Service Entrance Conductors (Overhead Service)

Service Entrance Size


Conduit Size

[IN]

IMCRMC

Conduit Type:




Service Drop Conductor Length

Service Entrance Conductor Length

XHHW

[AWG]

[AWG]

RHW

[FT]

[FT]

Rating

Single Phase:

Overcurrent Device:

[AMPS]

[VOLTS]

Network:

Voltage

Configuration:

Conductor Size

[AWG]

Ground Rod:

Water System:

Building Steel:

Well Casing:

Ground Ring:

Cu Al

Conductor Material:

· For 100A, 200A, and 300A Non-CT Services

· Provide all applicable information with Load Data cover sheet

· Add details for additional equipment as necessary

· Refer to the GVEA "Electrical Service Requirements for Commercial and Multi-Residential Installations"

Booklet and the current NEC for electric service construction requirements

Self-Contained Service One-Line

REVISED 03/2020


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60 387 203

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CT CABINET SERVICE

DISCONNECT

METER

ENCLOSURE

Member Name

Service Location

Date

Prepared By

WO #

GROUND RING

BUILDING STEEL


WATER PIPE

GROUND ROD

TO GVEA TRANSFORMER

[AMPS]

Overcurrent Device Rating

Three Phase: DeltaWye

FuseCircuit Breaker

Overcurrent Device Interrupt Rating [AIC]







Conduit Size

[IN]

IMCRMC

Conduit Type:






XHHW

[AWG]

[AWG]

RHW

[FT]

[FT]

Rating

Single Phase:

Overcurrent Device:

[AMPS]

[VOLTS]

Network:

Voltage

Configuration:

Ground Rod:

Water System:

Building Steel:

Well Casing:

Ground Ring:


Conductor Size

[AWG]

TO MEMBER

EQUIPMENT

TO GVEA TRANSFORMER



Conduit Size

Conduit Type:



Conductor Length


RMC IMC

[IN]

HDPE

[AWG]

[AWG]

[FT]

XHHW RHW USE

Cu Al

Conductor Material:

CT Service One-Line





Page 43

REVISED 03/2020

© 2020 Golden Valley Electric Association, Inc.

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Member Name

Service Location

Date

Prepared By

WO #

GROUND RING

BUILDING STEEL


WATER PIPE

GROUND ROD






Conduit Size

[IN]

IMCRMC

Conduit Type:






XHHW

[AWG]

[AWG]

RHW

[FT]

[FT]

Ground Rod:

Water System:

Building Steel:

Well Casing:

Ground Ring:


Conductor Size

[AWG]

Unit Overcurrent Device Ratings

Delta Wye

FuseCircuit Breaker

TO GVEA TRANSFORMER

TO MEMBER EQUIPMENT

3

5

8

12

4

6

7

Meter 1

Meter 2

Meter 3

Meter 4

Meter 5

Meter 6

Meter 7

Meter 8

Main Service Disconnect Overcurrent Device

(Required for more than six disconnects):

Main Service

Disconnect

Main Service

Disconnect Rating

TO GVEA TRANSFORMER

Overcurrent Device

Interrupt Rating [AIC]


Rating

[AMPS]

[VOLTS]

Voltage

Single Phase: Network:

Three Phase:

Configuration:

Main Service Disconnect

[AMPS]

[AMPS]

[AMPS]

[AMPS]

[AMPS]

[AMPS]

[AMPS]

[AMPS]

[AMPS]



Conduit Size

Conduit Type:



Conductor Length


RMC IMC

[IN]

HDPE

[AWG]

[AWG]

[FT]

XHHW RHW USE

Cu Al

Conductor Material:

Multiple Meter Service One-Line

REVISED 03/2020





Page 44© 2020 Golden Valley Electric Association, Inc.

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