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UTILITY SERVICEENTRANCESTANDARDS

UTILITY SERVICE ENTRANCESTANDARDS

Table Of Contents

0. Scope ……………………………………………… 1

1. Definitions ………………………………………… 1

2. Deviations From The Standard …………………… 3

3. The Canadian Electrical Code ……………………. 3

4. Interference With Utility Equipment ……………... 4

5. Requirements For Service …………..……………. 4

6. Supply Voltages …………………………………... 4

7. Utility Owned Transformers ……………………… 6

8. Load Balance ……………………………………... 6

9. Electric Loads …………………………………….. 6

10. Service Capacity ………………………………….. 8

11. Service To Multiple Occupancy Buildings ……….. 8

12. Service Entrances …………………………………. 10

13. Customer Service Conductors ……………………. 17

14. Customer Service Equipment …………………….. 19

15. Canadian Electrical Code Rules Regarding ServiceEntrances …………………………………………. 20

Table Of Contents (cont'd)

16. Metering ................................................... 23

17. Metering Specification For CustomerOwned Switchgear ..................................... 31

Figures:

Fig. 1 Service Mast Extending Through Roof

Fig. 2 Service Point of Attachment on Wall

Fig. 3 Pre-Wired, Single Phase, 120/240 Volt, 201 t o600 Amp, Current Transformer ConnectedEnclosure

Fig. 4 Single Phase, 120/240 Volt, 201 to 600 Amp,Current Transformer Connected

Fig. 5 Three Phase, 120/208 or 347/600 Volt 201 t o1200 Amp

Fig. 6 Current Transformer Connected May Pole,120/240V 400 Amp

Fig. 7 Self-Contained May Pole, 120/240V to 200 Amp

Fig. 8 Customer Owned Pole for Non-Fixed Premise

Fig. 9 Temporary Service Entrance, Tripod Mounted

Fig. 10 Outdoor Metering

Fig. 11 Utility Metering Equipment - Summary

Fig. 12 Installation of Metering Current Transformers

Fig. 13 Municipal Festive Lighting

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UTILITY SERVICE ENTRANCESTANDARDS

0. SCOPE

This standard sets forth the minimum utilityrequirements for electrical service in the provinceof New Brunswick. It is not to be regarded as adesign specification and is not all inclusive withrespect to the installation of electrical equipmentor wiring.

The requirements of this standard are in additionto the requirements of The Canadian ElectricalCode and the provincial electrical inspectionauthority, NB Safety Code Services.

1. DEFINITIONS

Complex Structure:

A complex structure is any structure that wouldbe difficult to supply with a single serviceentrance due to its physical characteristics orelectrical requirements. The designation of astructure as ‘complex’ must be mutually agreedupon by the Supply and Inspection authorities.

Customer:

A Customer is defined as the owner, occupant, oran agent of the owner or occupant of a buildingor occupancy who deals with the SupplyAuthority regarding the service entrance to theb u i l d i n g o r

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occupancy. A Customer’s agent may includeelectricians, contractors, consultants, engineers ortrustees of any kind.

Customer’s Service Conductors:

This term refers to Customer owned conductors.On an overhead entrance these would typically bethe conductors in the service conduit from thepoint at which the Supply Authority makesconnection at the service head to the Customer’sfirst service enclosure. On an undergroundentrance these would be the underground cablesfrom the utilities secondary system or transformerto the Customer’s first service enclosure.

Firewall/Fire separation:

Where occupancies of a building are separated by afirewall or a fire separation, the occupancies shallbe considered as separate buildings for the purposeof electrical service. Firewalls and fire separationsmust be constructed in compliance with theNational Building Code and confirmed as such inwriting by a recognized building inspector,architect, professional engineer or fire marshall.

Non-fixed Premise:

Non-fixed premise typically refers to a premisethat is not a permanently placed structure, such asa travel trailer or motor home. See section 12.5for service entrance options.

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Service Box:

An approved assembly consisting of a metal boxor cabinet constructed so that it may be locked orsealed, containing either service fuses and aservice switch or a circuit breaker, and of suchdesign that either the switch or circuit breakermay be manually operated when the box is closed.

Supply Authority:

The utility having the authority to supplyelectrical energy. New Brunswick has four SupplyAuthorities, NB Power, Saint John Energy,Edmundston Energy and Perth Andover LightCommission.

Utility Approval:

Written approval from the Supply Authorityauthorizing deviations from this standard. UtilityApproval must be obtained prior t ocommencement of the work for which the UtilityApproval is being requested and the authorizeddeviation will apply only to the specificinstallation for which it was granted.

Utility Supply Conductors:

This term refers to the utility owned overheadconductors connecting the Customer’s serviceconductors to the utility’s secondary system ortransformer.

4 June 2010

2. DEVIATIONS FROM THE STANDARD

Where provisions are made for deviations from thisstandard, Utility Approval shall be required.

3. THE CANADIAN ELECTRICAL CODE

Interpretation of the Canadian Electrical Code in theprovince of New Brunswick is the responsibility of NBSafety Code Services.

The Utility Service Entrance Standard containsreferences to the Canadian Electrical Code which areof interest to the Supply Authority. This documentdoes not, however, constitute a complete explanationof all CEC rules, which apply to service entrances.

Where the code refers to compliance with therequirements of the local Supply Authority, the utilityshall be consulted for approval. Where compliance isnot met, the Supply Authority will request action bythe Inspection Authority.

See also section 15 - Canadian Electrical Code RulesRegarding Service Entrances.

4. INTERFERENCE WITH UTILITY EQUIPMENT

The Supply Authority does not permit disconnectionor removal of meters, meter seals, utility supplyconductors or any of its equipment. Requests fordisconnection or removal of utility equipment shall bemade to the utility’s regional office.

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5. REQUIREMENTS FOR SERVICE

Service entrances will be connected uponcompliance with the following requirements:

a) the Supply Authority has approved theservice entrance location, capacity andprovisions for metering equipment; and

b) the installation has a signed valid wiringpermit issued by NB Safety Code Services; and

c) the master I.D. sticker, or the sub I.D.sticker, is affixed to the meter box(es); and

d) the installation meets all other requirementsof the Utility Service Entrance Standards.

e ) For all entrances larger than 200A, theelectrical contractor must supply the Utilitywith a drawing showing the physical layout ofthe service entrance equipment includingmain disconnect, meter socket, instrumenttransformer cabinet, splitters, sub-metering,etc.

6. SUPPLY VOLTAGES

An electrical service should be designed such thatthe supply voltage is the voltage utilized by thelargest portion of the load. The Customer shallsupply all transformation necessary to serve loadsutilizing voltages different from the supplyvoltage.

The frequency of all supply voltages is 60 hertz.

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6.1 Primary Supply Voltages

Contact the local supply authority for therequirements associated with service at primaryvoltages.

6.2 Secondary Supply Voltages

Nominal secondary supply voltages are:

a) 120/240 volt, single phase, three wire; or

b) 120/208 volt, three phase, four wire groundedwye; or

c) 347/600 volt, three phase, four wire groundedwye; or

d) where Utility Approval is granted, 347/600 volt,three phase, four wire high resistance groundedwye. Where this configuration is approved andconforms to CEC rules 6-412 and 10-1100 t o1108, the Customer shall provide the groundingresistor, all wiring, connectors, compartments,etc., associated with the high resistance groundinstallation.

6.3 Supply Voltage Operating Ranges

The normal and extreme operating ranges forsecondary supply voltages at the point of delivery areas follows:

Nominal voltage - 120/240 VoltsNormal Range - 110/220 - 125/250Extreme Range - 106/212 - 127/254



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Improvement of voltage levels beyond the normalrange but within the extreme range is done on aplanned basis. Immediate corrective action shall betaken to correct voltage levels outside the extremerange.

7. UTILITY OWNED TRANSFORMERS

Sizing of utility owned transformers is theresponsibility of the utility. Customers shall notrequest transformers of a specific size.

8. LOAD BALANCE

Services shall be designed such that the ratedamperage and operating cycles of connected singlephase loads will result in equal current in all phases ofthe supply. Under nominal operating conditions theactual current in all phases of the supply shall bewithin 10 percent.

9. ELECTRIC LOADS

Operating large loads such as motors, electricfurnaces, electric welders, air conditioners, heatpumps, etc., can produce a momentary voltage sag or‘flicker’. It is the responsibility of the Customer t oensure that electric loads are switched on in such waythat sag or flicker is minimized. The operatingrequirements of large loads should be givenconsideration during design of the service entrance.

9.1 Electronic Equipment

The Customer is responsible for the installation ofsurge protection on sensitive electronic equipment.

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9.2 Electric Motors

9.2.1 Motor Sizes:

a) The maximum motor sizes permitted for startingacross the line shall be:

i) Single phase, 7.5 horsepower; andii) Three phase 120/208 volt, 15 horsepower;

andiii) Three phase 347/600 volt, 40 horsepower.

b) Larger motors are permitted where:

i) The Customer installs some type of reducedvoltage or variable frequency start; or

ii) Upon examination of the utility’s systemcapabilities and the motor’s characteristics,Utility Approval for starting across the line isgranted.

9.2.2 Motor Protection:

The Customer shall be responsible to provide allmotor protection as per CEC rule 28-400.

Normal overload protection will likely not provideadequate protection during loss of one supply phase.Loss of one phase of the utility supply (or of thebuilding distribution system) will cause overheating anddamage to three phase motors. Therefore, protectionagainst the loss of one supply phase is recommendedand is the responsibility of the Customer.

9.3 Heat Pumps:

The Supply Authorities recommend heat pumps befitted with starting capacitors.

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10. SERVICE CAPACITY

10.1 Single Phase

a) The maximum single phase service entrancecapacity shall be 600 amps.

b) Notwithstanding a), an 800 amp single phaseunderground service may be permitted withUtility Approval. [Utility Approval Criteria -Three phase service is not readily availablefrom the utility and the utility’s systemcapacity is adequate or, at the discretion ofthe utility.]

10.2 Three Phase

a) The maximum overhead three phase serviceentrance capacity shall be 600 amps.

b) The maximum three phase service entrancecapacity shall be 2000 amps.

c) Service entrance capacities greater than 2000amps shall have secondary bus ducts orparallel service conductors. Service entrancesgreater than 2000 amps shall have a detailedengineering analysis prepared by a registeredprofessional engineer and submitted to theInspection Authority.

d) Before commencing any service entranceinstallation using bus duct, the Customer shallconsult with the Supply Authority.

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11. SERVICE TO MULTIPLE OCCUPANCYBUILDINGS

a) Multiple Occupancy Buildings include strip mallsor plazas, duplex, row and semi-detached housing,and other such structures.

b) Where a non-residential multiple occupancybuilding qualifies as complex structure, refer t osection 15.1 Rule 6-102 - Number Of SupplyServices Permitted.

c) Where more than one set of utility supplyconductors is run to a residential multipleoccupancy building:

i) The services shall be run underground; and

ii) The occupancies shall be completely self-contained (i.e. no indoor access betweenoccupancies); and

iii) The occupancies shall not be located oneabove the other; and

iv) The occupancies shall have a separateentrance with direct access to ground level.

d) Notwithstanding c) i), multiple services may bepermitted overhead with Utility Approval. Wheremultiple overhead services are permitted themeters and weatherheads need not be grouped.

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Intent:

Utility Approval for multiple overhead servicesto residential multiple occupancy buildings shallonly be given where:

a) It will not cause the utility construction oroperational problems (pole space,unacceptable mid-span taps); and

b) It will not create undesirable aesthetics forsurrounding Customers; and

c) A municipal by-law does not restrict serviceto underground.

12. SERVICE ENTRANCES

12.1 Service Entrance Locations

12.1.1 General:

Before commencing any service entranceinstallation the Customer shall obtain approvalfrom the Supply Authority for the route of theutility supply conductors, the location of theservice head and the location of the point ofattachment for the utility supply conductors asper CEC rule 6-116 paragraph (a).

Where an approved service route crosses privateproperty the Customer shall be responsible forsupplying and clearing the route.

The Customer is responsible for any costsincurred by the utility in acquiring easements.

For all entrances larger than 200A, the electricalcontractor must supply the Utility with a drawingshowing the physical layout of the serviceentrance

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equipment including main disconnect,meter socket, instrument transformercabinet, splitters, sub-metering, etc.

12.1.2 Prefabricated Homes:

a) As with buildings constructed on site,the Customer shall obtain approvalfrom the Supply Authority for theroute of the utility supply conductors,the location of the service head andthe location of the point ofattachment for the utility supplyconductors for prefabricated homes(modular homes, mini homes, etc.)being constructed for a specificbuilding lot.

b) Where the entrance on a newprefabricated home will be stubbed outbeneath the floor and conduit will berun to one side of the home forconnection to a service mast, theCustomer shall also obtain approvalfor the entrance location from theSupply Authority.

12.1.3 Utility Supply Conductor Loop Lengths:

The maximum length of a utility serviceloop from the last utility pole to thepoint of attachment at the building shallbe as follows:

EntranceCapacity

Maximum Loop Length

Single Phase Three Phase

100A 30 m 27 m200A 27 m 24 m400A 18 m 18 m600A 15 m 15 m

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12.2 Overhead

12.2.1 Utility Supply Conductors - Point Of AttachmentAt Building (Figures 1 and 2):

a) As per CEC rule 6-112, subrule (1), a meansof attachment shall be provided for the utilitysupply conductors. Utility supplied point ofattachment hardware, or an equivalent, shallbe installed by the Customer. As per CECrule 6-116, paragraph (a), the service head,and therefore the point of attachment, shallbe installed in compliance with therequirements of the Supply Authority.

b) As specified in CEC rule 6-116, paragraph(b), the point of attachment shall a minimumof 150mm and a maximum of 300mm belowwhere the Customer’s service conductorsemerge from the service head.

c) The point of attachment shall be within 1.0metre horizontally from the service head.

d) The point of attachment shall maintain aclearance of 1.0 metre from windows, doorsand porches.

e) The point of attachment shall not exceed 6metres above finished grade without UtilityApproval and in no case shall it exceed 9metres.

f) Utility supply conductors above finishedgrade shall satisfy CEC rule 6-112, subrule(2).

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g) In keeping with the Code requirement that theentrance be located in compliance with therequirements of the Supply Authority, the pointof attachment shall not be located where theutility supply conductors are subject to physicaldamage.

h) The point of attachment may be located on:

i) A service mast extending through a roofoverhang (Figure 1); or

ii) The gable end (Figure 2); or

iii) Under eaves, provided the roof is not metaland the ground clearances of CEC rule 6-112,subrule (2) can be met.

i) A service mast passing through a roof overhangshall:

i) be located such the distance the utility supplyconductors cross over the roof does notexceed 2.0 metres in any direction. Wherethe distance would exceed 2.0 metres, consultCEC rules 2-030 and 12-310, and theInspection Authority for approval. (Rationale:Supply service conductors crossing roofscreate potential trip hazards for firefightersand snow removal crews.); and

ii) be guyed to a main structural member of theroof (rafter, truss) where the point ofattachment on the mast exceeds 1.5 metresabove the roof (as per CEC Appendix B rule6-112 (4) (c)).

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j) The point of attachment shall be able t owithstand a tension of 600 lbs. (2670 N).

k) The point of attachment shall be such that itallows the utility to maintain a designclearance of 1.0m horizontal or 3.0m verticalbetween the utility supply conductors andbuilding surfaces that are readily accessible.

12.2.2 Customer’s Service Stacks And Conduits:

a) The maximum number of service stacks shallnot exceed two. Two parallel conduits will beconsidered as one service stack.

b) Service weatherheads shall be located within300mm of each other for connection to asingle set of utility supply conductors.

c) Service conduit shall meet the requirementsof the inspection authority and CEC rule 6-112, subrules (4) and (5). However, wherethe point of attachment is on the serviceconduit, the conduit shall be rigid steel of aminimum nominal size of 2-1/2 inches.

12.2.3 Customers Service Conductors At Service Head:

a) As per CEC rule 6-302, subrule (3), theCustomer’s service conductors shall extend aminimum of 750mm beyond the service headon new services.

b) For reconnection of an existing service, theCustomer’s service conductors shall extend aminimum of 450mm beyond the service head.

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12.2.4 Service Entrances Located On Utility Poles:

a) Service entrances and meters shall not be locatedon utility poles except for:

i) Maypoles (Figures 6 and 7); and

ii) Temporary entrances where Utility Approvalhas been granted; and

iii) Overhead services to non-fixed premises (seesection 12.5 - Non-Fixed Premises).

b) The above services are only to be located onutility poles, which are not supporting primaryfacilities.

c) Where a service entrance and meter are installedon a utility pole the weatherhead shall be installedto a location between 150mm and 600mm belowthe utility’s secondary conductors.

d) Notwithstanding, unmetered service entrancesmay be located on approved utility poles includingpoles supporting primary facilities. As with anyentrance location these entrances require priorapproval from the Supply Authority. Theweatherhead for an unmetered service shall belocated 150-600mm below the secondaryconductor, except for CATV power supplies,which shall have the weatherhead located 25-150mm above the secondary conductor.

12.3 Underground

a) Underground service entrance conductors andconduits are to be owned, installed and maintainedby the Customer.

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b) Underground Customer service conductorsshall be installed as directed by the utility andin the following manner:

i) To a utility pole where a length of serviceconductor specified by the SupplyAuthority will be left at the base of thepole for the Supply Authority to secureto the pole and make connections, exceptin the cities of Saint John andEdmundston where rigid PVC conduit anda weatherhead will also be installed to aheight as directed by the Utility.

ii) To a utility underground secondaryenclosure or padmounted transformerwith an additional 1.5m of conductor leftin enclosures and 2.0m in transformers.

c) Where an underground service conduitterminates at an outdoor meter enclosure thevertical section of conduit shall be fitted withan expansion joint. Where the expansionjoint is comprised of two conduits of differentdiameter, the outer or larger conduit shall beat the top of the run. Rationale: CEC rule12-1118 specifies the requirements forexpansion joints for vertical runs of PVC.The above standard assumes that frostconditions in the province are sufficient t ocause the 45mm expansion stated in rule 12-1118. Therefore, all such runs shall have anexpansion joint.

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12.3.1 Service From Padmounted Transformers:

Where a padmounted transformer is required, theCustomer shall contact the utility’s engineeringdepartment for information regarding transformer padlocation and construction standards, trenching andduct installation details, grounding, concretespecifications, cable installation guidelines, etc.

See also section 10.2 - Service Capacity, Three Phase,and section 15.3 Rule 26-242 - Outdoor TransformerInstallations.

12.4 Temporary Service Entrances

a) A temporary service entrance is intended to beused to supply power for construction purposes orto Customers requiring power for a duration of lessthan six months.

b) Temporary services may be mounted on:

i) Construction shacks or trailers equipped with aservice mast; or

ii) A Customer owned pole or tripod structure(Figure 9) which meets the requirements ofCEC rule 76-010, subrule (3) and is acceptableto the Inspection Authority and the SupplyAuthority; or

iii) On a Utility pole as per section 12.2.4 -Service Entrances Located On Utility Poles.

c) Utility supplied point of attachment hardware, oran equivalent, shall be installed by the Customer.

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d) The point of attachment shall be located suchthat the utility supply conductors clearanceabove finished grade satisfies CEC rule 6-112,subrule (2).

12.5 Non-Fixed Premises

Service for non-fixed premises may be:

a) Overhead service to a Customer’s serviceentrance mounted on a utility pole (the polenot supporting primary facilities); or

b) Underground service to a Customer’s serviceentrance mounted on a structure to beinstalled, owned and maintained by theCustomer. The structure must meet therequirements of CEC rule 76-010, subrule (3),and rule 76-008, and be acceptable to theInspection Authority and the SupplyAuthority. A typical structure would consistof two 6” x 6” posts set 1200 mm deep and aplywood back board with dimensions greaterthan those of the meter base and meet therequirements of 16.3 for meter mountingheight; or

c) Overhead service to a Customer’s serviceentrance mounted on a Customer ownedtreated wooden pole, or equivalent, (Figure 8)which meets the following:

i) The overall pole length shall be such thatthe height of the pole after setting allowsthe utility supply conductors to satisfythe clearance requirements of CEC rule 6-112, subrule (2); and

ii) The pole shall be set to a depth of 10%of the pole length plus 600mm. (Example- a 7.5 metre pole shall have a settingdepth of 750mm + 600mm = 1350mm);and

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iii) Wooden poles shall have a minimumgroundline circumference of 725mm and aminimum top circumference of 475mm; and

iv) The Customer’s entrance shall be mountedsuch that the weatherhead is located 300mmbelow the top of the pole; and

v) a guy and anchor (also Customer owned) isrecommended on all installations but shall beinstalled by a qualified utility contractor wherethe span exceeds 8m (see note below); and

vi) The pole installation is acceptable to theInspection Authority and the SupplyAuthority.

(Note: CSA C22.3 No. 1 section 3.2.6 - ‘MarkingOf Guys’ states that ‘all guys exposed to traffic(including pedestrian traffic, skiers, snowmobiles)shall be equipped with substantial and conspicuousguards’. Utility guy guards meet CSA StandardC83.69. It is recommended that equivalent guardsbe installed on Customer owned guys.)

13. CUSTOMER SERVICE CONDUCTORS

13.1 Conductor Sizes

The standard copper and aluminum service entranceconductor sizes for overhead and underground servicesshall be as issued by the Inspection Authority'sElectrical Inspection Bulletins.

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Other conductor sizes and parallel configurationsmay be acceptable with Utility Approval andapproval of the Inspection Authority. See alsosection 13.2 - Maximum Lengths ForUnderground Conductors, and section 13.3 -Connectors For Service Entrance Conductors.

13.2 Maximum Lengths For UndergroundConductors

Underground service loops must meet the voltagedrop requirements of CEC rule 8-102. Largerconductors may be required where, based on theexpected demand current, the calculated voltagedrop exceeds the combined limits of rule 8-102,subrule (1), paragraphs (b) and (c).

The service conductors maximum length alsodepends on individual feeder and branch circuitvoltage drops. Therefore, each installation mustbe analyzed separately. Analysis is theresponsibility of the Customer.

Where the conductor size is increased t oovercome voltage drop, the proposed conductorsize shall meet the requirements of the InspectionAuthority and once approved, the SupplyAuthority must be notified.

13.3 Connectors For Service EntranceConductors

The utility will provide and install connectors forthe standard service entrance conductor sizesissued by the Inspection Authority to a maximumof 750 MCM. In the event that non-standardservice entrance conductor sizes are used and theutility does not stock a suitable connector, theCustomer shall supply the connectors.

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13.4 Customer’s Service Conductor Identification

13.4.1 Phase Conductors:

Like phases of parallel service entrance conductorsshall be so identified.

13.4.2 Neutral Conductor:

As per the NB Electrical Regulations, neutralconductors shall be identified by the color white in amethod suitable to the requirements of the InspectionAuthority.

14. CUSTOMER SERVICE EQUIPMENT

14.1 Service Equipment Location

a) A Customer’s service equipment, including indoormetering equipment, shall be installed as specifiedin CEC rule 6-206, subrule (1) paragraphs (a) t o(e).

b) Where meters are located in electrical rooms orpremises with normally locked doors, theCustomer shall ensure accessibility by way of akey, a keybox, on site personnel, etc.

c) The Customer shall provide the utility with thesame minimum working space and headroomaround indoor metering equipment and enclosuresas required by CEC rule 2-308, subrules (1) and (4)for electrical equipment. As stated in the Code, asecure footing shall be provided.

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d) In addition to the above, the utility requiresthat the following CEC rules be observedwhere utility metering equipment orenclosures are located:

i) Rule 2-310, subrules (1) to (4) - EntranceTo, and Exit From, Working Space

ii) Rule 2-312 - Accessibility forMaintenance

ii i) Table 56 - Minimum Working SpaceAbout Electrical Equipment HavingExposed Live Parts

iv) Rule 2-322 – Electrical Equipment NearCombustible Gas Meters and OtherDevices (meters are considered to be “arcproducing electrical equipment” for thepurposes of rule 2-322).

14.2 Service Disconnect

a) As per CEC rule 6-206, subrule (1), paragraph(e), the main service disconnect shall belocated as close as practical to the pointwhere the Customer’s service conductorsenter the building. In no case shall thisdistance exceed 5.0 metres.

b) Conductors meeting the requirements of CECrule 6-208 shall be considered to be outsidethe building.

14.3 Fault Current Interrupting Rating

The utility can provide the fault current levels onthe primary distribution system at the serviceentrance location to allow Customer equipmentto be sized to meet the requirements of CEC rule14-012, paragraph (a).

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15. CANADIAN ELECTRICAL CODE RULESREGARDING SERVICE ENTRANCES

Many utility requirements are covered by C22.1 ‘TheCanadian Electrical Code Part I’.

For reasons such as economics or space for, or on,poles, the Supply Authority sometimes finds itnecessary to further limit that which is allowed by theCode. Listed below are various Code rules relating t oservice entrances and the interests of the SupplyAuthority.

The local utility shall be consulted when the coderequires compliance with the requirements of SupplyAuthority. Compliance may be enforced by theInspection Authority at the request of the SupplyAuthority.

15.1 Rule 6-102 - Number Of Supply ServicesPermitted

a) In keeping with the CE Code Handbook Rationaleand Intent for rule 6-102, it is the intent of theutility to run only one set of utility supplyconductors to any building to avoid electricalhazards for personnel and to permit ease ofdisconnection during emergency situations.

b) The Code does not allow two or more services ofthe same voltage and characteristic to any buildingwith exceptions listed in paragraphs (1a), (1b) and(1c). Paragraph (1a), “fire pumps and otheremergency systems”, is self-explanatory andacceptable to the utility.

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c) Installations allowed by paragraphs (1b) and (1c),covering industrial establishments, complexstructures and self-contained occupancies, willhave to be assessed individually by the SupplyAuthority as it is the intent of the utility t orun only one set of utility supply conductorsto a building. More than one supply serviceto a building will require Utility Approval.

d) Where more than one service entrance isapproved, rule 6-102 subrules (2) and (3) andrule 6-214 must be observed.

e) More than one service may be permitted t obuildings with completely self-containedoccupancies as per Section 11 - Service T oMultiple Occupancy Buildings.

f) With Utility Approval more than one servicemay be permitted to a complex structurewhere a complex structure is any structurethat would be difficult to supply with a singleservice entrance due to it’s physicalcharacteristics or electrical requirements.The designation of a structure as ‘complex’must be mutually agreed upon by the Supplyand Inspection authorities.

15.2 Rule 14-612 - Transfer Equipment ForStandby Power Systems

Transfer switches for transferring the source ofpower from the utility system to a standby powersystem must meet the requirements of CEC 14-612. The switch shall not allow the two sourcesto operate in parallel to prevent energizing orbackfeeding a de-energized utility distribution lineon which crews may be working.

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15.3 Rule 26-242 - Outdoor TransformerInstallations

The Supply Authority intends to meet therequirements of rule 26-242, subrules (2) and (3),regarding the location of liquid filled padmounteddistribution transformers near combustible surfaces ormaterials, windows, doors and ventilation openings.Therefore, the Customer must locate the transformerpad to meet the requirements of the applicable subrule.

Subrule (4) allows the distances given in subrules (2)and (3) to be reduced provided a non-combustiblebarrier is constructed around the transformer.Construction of the non-combustible barrier is theresponsibility of the Customer.

Specifications for a non-combustible barrier areavailable from the utility, or, the Customer maypropose an alternative design to the utility’sengineering department for Utility Approval.

16. METERING

16.1 General Requirements

a) All three phase meter installations are threeelement meters.

b) There shall be a maximum of one meter peroccupancy except by Utility Approval.

c) If the service consists of a combination of meterinstallations, then all meters shall be grouped inone location.

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d) CEC rule 6-408, subrule (2), locatinginstrument transformers outdoors and themeter indoors, shall not be permitted by theSupply Authority.

e) Access fittings (LB, LR or LL elbows) are notpermitted in conduits used for meteringwiring.

f ) All equipment must be approved for theapplication by a certification organizationacceptable to the Inspection Authority.

g) Rule 2-322 – Electrical Equipment NearCombustible Gas Meters and Other Devices(meters are considered to be “arc producingelectrical equipment” for the purposes of rule2-322).

16.2 Location, Access, and Space Requirements

a) Before commencing any service entranceinstallation the Customer shall consult withthe Supply Authority to ensure compliancewith the requirements of:

i) CEC rule 6-408, subrule (1), paragraphs(a) to (f) regarding location and groupingof, and access to, utility meteringequipment; and

ii) CEC rule 6-410 regarding spaceprovisions for utility metering equipment.

b) A Customer’s service equipment, includingindoor metering equipment, shall be installedas specified in CEC rule 6-206, subrule (1)paragraphs (a) to (e).

c) The Customer shall provide the utility withthe same minimum working space (1m) andheadroom (2.2m) around indoor metering

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equipment and enclosures as required by CEC rule2-308, subrules (1) and (4) for working spacearound electrical equipment.

d) Floor or grade surfaces around metering equipmentshall have a secure footing as per CEC rule 2-308 -Working Space About Electrical Equipment.

e) In addition to the above, the utility requires thatthe following CEC rules be observed where Utilitymetering equipment is contained in electricalrooms:

i) Rule 2-310, subrules (1) to (4) - Entrance To,and Exit From, Working Space

ii) Rule 2-312 - Accessibility for Maintenance

iii) Table 56 - Minimum Working Space AboutElectrical Equipment Having Exposed LiveParts

16.3 Meter Mounting Height

All meters, except those mounted in network metercenters, shall be mounted such that the horizontalcenterline of the meter is between 1.5m and 1.7mmeasured vertically from the finished floor or gradelevel. If the grade is changed the meter box must berelocated to re-establish the proper meter mountingheight or other provisions made which are acceptableto the supply authority.

16.4 Instrument Transformers And Enclosures

a) The electrical contractor is responsible to supplyand install all connectors used to make primaryconnections to the current transformers.

June 2010 29

b) The utility will supply the instrument(current and potential) transformers.

i) For NB Power, Saint John Energy andPerth-Andover Light Commission theCustomer shall install the currenttransformers in a Customer suppliedenclosure and make the primaryconnections. The utility will do thesecondary wiring and install the testswitch. Current transformers up to andincluding 1200:5 are bar-type whereas1500:5 and 3000:5 are window type.

ii) Edmundston Energy will install thecurrent transformers in a Customersupplied enclosure. The utility will do theprimary and secondary wiring and installthe test switch.

iii) All utilities will make the potentialtransformer connections. EdmundstonEnergy does not require potentialtransformers at 347 V.

c) The current transformer enclosure and themeter shall be in the same room. Wiringfrom the current transformer secondaryterminals to the meter shall not exceed 9metres in length. [Intent: Deviations requireanalysis of the current transformer secondarycircuit to ensure the billing accuracy burden isnot exceeded and approval of the utility’smetering department.]

d) Instrument transformer installations shallmeet the requirements of CEC rule 6-404. Inaddition to the requirements of this rule,instrument transformers shall be mounted in aseparate cabinet from the meter withadequate provision for sealing by the SupplyAuthority.

30 June 2010

16.5 Metering At Customer Owned Transformers

Metering shall be installed on the supply side ofCustomer owned transformers. Where UtilityApproval is given to deviate from this requirement,the Customer owned transformer must meet therequirements of CSA C802 (latest revision) -‘Maximum Losses for Distribution, Power, and Dry-Type Transformers’.

16.6 Single Phase - 120/240 Volt, Up To 200 Amp, SelfContained

This installation uses a 4 jaw meter socket rated forthe amperage and voltage of the entrance.

Meter Outdoors:

a) The meter shall be connected on the supply sideof the service box.

b) For location outdoors (Figure 10) this installationshall not exceed:

i) Six meters per supply service; and

ii) A total combination of two meter mountingdevices which shall be grouped in one location;and

iii) Two service stacks which shall be locatedwithin 300mm of each other for connectionto a single set of overhead utility supplyconductors ; and

iv) A combined total rating of 600 amps.

June 2010 31

Meter Indoors:

a) The meter shall be connected on the load sideof the service box.

b) This meter installation shall be indoors wherethe number of meters exceeds six.

16.7 Single Phase - 120/240 Volt, 201 To 600Amp, Current Transformer Connected

This installation uses;

a) a 5 jaw meter socket rated for 20 amps, a testswitch and a 500mm x 500mm x 250mmcurrent transformer cabinet; or

b) an approved pre-wired meter socket whichincludes the test switch and currenttransformer. (Note: check with the utilityregarding programs for reimbursement of thecost of the test switch and currenttransformer when pre-wired boxes areinstalled.)

Meter Outdoors:

a) Location

i) On residential or commercial buildings,the meter, test switch and currenttransformer may be located outdoorswhen installed in a pre-wired enclosure(meter, test switch and CT’s all in sameenclosure) approved by the SupplyAuthority (Figure 3); or

32 June 2010

ii) On residential buildings only, the meter andtest switch may be located outdoors and thecurrent transformers located indoors.

b) The meter shall be connected on the supply sideof the service box.

Meter Indoors:

a) Location

i) On commercial buildings the meter and currenttransformers shall be located indoors (Figure4) except as provided for by Meter Outdoorsa), i) above.

ii) The current transformer enclosure and themeter shall be in the same room. Wiring fromthe current transformer secondary terminalsto the meter shall not exceed 9 metres inlength.

b) The meter shall be connected on the load side ofthe service box.

16.8 Network - 120/208 Volt, Up To 200 Amp, SelfContained

a) This installation uses a 5 jaw meter socket ratedfor the amperage and voltage of the entrance.

b) Each network meter shall be connected on thesupply side of the service box for the occupancyassociated with the meter.

June 2010 33

c) Meters for this installation shall only belocated indoors.

d) Each meter and corresponding subswitch shallbe clearly and permanently identified t oindicate which occupancy it serves.

e) The neutral conductor shall run through thesocket and be connected to the neutral lug.

16.9 Three Phase - 120/208 Volt, Up To 200 Amp,Self Contained

This installation uses a 7 jaw meter socket ratedfor the amperage and voltage of the entrance.

The neutral conductor shall run through thesocket and be connected to the neutral lug.

Meter Outdoors:

a) The meter shall be connected on the supplyside of the service box.

b) For location outdoors this meter installationshall not exceed:

i) Six meters per supply service; and

ii) A combined total rating of 600 amps; and

iii) A total combination of two metermounting devices which shall be groupedin one location; and

iv) Two service stacks which shall be locatedwithin 300mm of each other forconnection to a single set of utilitysupply conductors.

34 June 2010

Meter Indoors:

a) This meter installation shall be indoors where thenumber of meters exceeds six.


16.10 Three Phase - 120/208 Volt, 201 To 1200 Amp,Current Transformer Connected

This installation uses a 13 jaw meter socket rated for20 amps, a test switch and a 760mm x 760mm x250mm current transformer cabinet.

Meter Outdoors:

a) On residential or commercial buildings, the meter,test switch and current transformers may belocated outdoors when installed in an enclosureapproved by the Supply Authority.

b) The meter shall be connected on the supply sideof the service box.

Meter Indoors (Figure 5):

a) The current transformer enclosure and the metershall be in the same room. Wiring from thecurrent transformer secondary terminals to themeter shall not exceed 9 metres in length.


June 2010 35

16.11 Three Phase - 347/600 Volt, Up To 200 Amp,Self Contained

a) This installation uses a 7 jaw meter socketrated for the amperage and voltage of theentrance.

b) Meters for this installation shall only belocated indoors.

c) The meter shall be connected on the load sideof the service box.

d) The neutral conductor shall run through thesocket and be connected to the neutral lug.

16.12 Three Phase - 347/600 Volt, 201 To 1200Amp, Potential And Current TransformerConnected

Refer to Figure 5.

a) This installation uses a 13 jaw meter socketrated for 20 amps, a test switch and a 760mmx 760mm x 250mm transformer cabinet.

b) Meters for this installation shall only belocated indoors.

c) The meter shall be connected on the load sideof the service box.

d) The instrument transformer enclosure andthe meter shall be in the same room. Wiringfrom the current transformer secondaryterminals to the meter shall not exceed 9metres in length.

36 June 2010

17. METERING SPECIFICATION FOR CUSTOMEROWNED SWITCHGEAR

17.1 Scope

This specification applies to revenue meteringequipment in Customer owned metal clad or metal-enclosed switchgear of three phase four wire groundedwye circuits at 120/208, 347/600, 2400/4160 or7200/12,470 volts. Service at 14,400/24,940 voltsmay also be available with utility approval.

17.2 Inspection or Qualification

Generally, any inspection, qualification or acceptancetests applying to the switchgear unit as a whole mustinclude the metering equipment.

17.3 Reference

The metering equipment must be installed andconnected in accordance with, and observance of, theCanadian Electrical Code and the Utility ServiceEntrance Standard.

Revenue metering equipment is for utility use only.The connection of Customer owned load controlequipment to utility equipment may be permitted withutility approval.

17.4 Detailed Requirements

A. Current Transformers:

i) Current Transformers Supplied By The SupplyAuthority

June 2010 37

The Supply Authority will provide therequired current transformers (3 - one perphase) to the switchgear manufacturer formounting on the main incomer, on theload side of the main breaker.

ii) Current Transformers Supplied By TheCustomer

a) The current transformers must beapproved for revenue metering inCanada. The Measurement Canadaapproval number must be supplied t othe Supply Authority. Currenttransformer accuracy class must be0.3 B 0.9 minimum.

b) Current transformers shall be ratedfor the voltage and maximumcapacity of the entrance.

c) The current transformer ratio andtype will be specified by the SupplyAuthority at the time of purchase.Dual ratio current transformers maybe required.

d) Current transformers having NEMA standarddimensions must be used whereverpossible.

iii) Connections

a) Primary connections must be madesuch that the current transformers H1polarity marks are toward the sourceside of the circuit.

38 June 2010

b) Secondary connections must be broughtout to a suitable and accessible stud typeterminal block where ratio changes or testscan readily be performed.

iv) Mounting

a) Current transformers shall be mounted soas to be readily accessible for replacementor inspection, and with their name-platesreadable when energized.

b) Window-type current transformers shall bestaggered so that the center transformer islower than the two outside transformers.This is to minimize flux linkage betweentransformers.

B. Potential Transformers

i) The Supply Authority will provide and installthe potential transformers. The threepotential transformers must be connectedphase-to-neutral on four wire wye circuits.

ii) Where the potential transformers are suppliedby the Customer, the transformers must beapproved for revenue metering in Canada.The Measurement Canada approval numbermust be supplied to the Supply Authority.Potential transformer accuracy must be 0.3W0.6X minimum.

June 2010 39

iii) Potential transformers shall be rated asfollows:

a) 360/120 for 347/600 volt wyecircuits

b) 7200/120 for 12,470/7200 volt wyecircuits

c) 14,400/120 for 24,940/14,400 voltwye circuits

d) 2400/120 for 4160/2400 volt circuits

iv) The switchgear manufacturer will ensureprovisions for the utility to seal or lockthe potential transformer compartment.

v) Potential transformers having NEMAstandard dimensions must be usedwherever possible.

vi) Mounting

a) 2400/120, 7200/120 and 14,400/ 120volt potential transformers shall bemounted in an approved type tip-outor draw-out drawer having positivemake spring type contacts on boththe primary and secondary sides.High voltage fuses must be mountedon the transformer in such a way thatthey may be readily removed whenthe drawer is in the open position.An automatic high voltage groundingdevice is to be provided for eachpotential transformer. The groundingdevice will engage when the drawer isin the open position.

40 June 2010

b) Mounting space for 360/120 voltpotential transformers shall be a minimumof 200mm x 200mm x 200mm for eachtransformer.

vii) Connections

Potential transformer primary connectionsmay be made to any point on the switchgearsmain bus on the source side of the currenttransformer.

viii)Fuses

Primary fuses are to be provided on each7200/120 volt, 14,400/120 volt, and2400/120 volt potential transformer, one fusein each line from the main bus. A fuse maynot be used in the common return lead to thegrounded neutral.

Secondary fusing shall be of the cartridge typeand mounted at the rear of the panel betweenthe terminal block and the test switch.

Three spare primary and three sparesecondary fuses shall be supplied with theswitchgear.

C. Secondary Wire

i) Panel wiring shall be not less than #12 AWGsolid wire of a type approved for switchgearuse.

ii) All wires shall be identified by coloredinsulation or a marking or tagging system.

June 2010 41

iii) Wires passing through steel panels shallbe protected by a rubber grommet.

iv) All terminal blocks are to be the studtype.

v) Separate terminal blocks are to beprovided for current transformer andpotent ia l t ransformer secondaryterminations. All terminal blockconnections shall be identified and madein sequence. All terminal blocks must beof the stud type and be sealable or locatedin a compartment that is sealable by theSupply Authority.

D. Grounding

The current transformer secondary circuit shallbe grounded at one point at the test switch. Noother current transformer secondary ground ispermitted.

The potential transformer secondary neutral shallbe grounded at the test switch.

E. Location of Meters and Test Switch

i) Where it is possible to locate the metersocket and test switch in a compartmentwithin the switchgear, the minimumdimensions shall be 500mm wide by600mm high by 250mm deep.

The meter and instrument transformersmust be separate compartments orseparated by a steel panel on which themeter and test switch may be mounted.The steel panel must be hinged orremovable if it provides the only accesst o

42 June 2010

any instrument transformers located behind it.The access door to the compartment musthave adequate means for locking or sealing.

A bushed hole, at least 37mm in diameter,shall be provided between the instrumenttransformer and meter compartments for thepassage of secondary wires.

ii) The meter and test switch may both be in aseparate metal meter cabinet.

When the meter socket is remotely located,rigid conduit sized not less than 37mm for a 4wire circuit must be installed between themeter socket and the instrument transformercompartment. The current transformersecondary conductors must not exceed 9metres.

iii) It is permissible to locate the meter and testswitch within the same compartment as theinstrument transformers if a safety barrierprovides isolation between the transformersand the meter and test switch. The safetybarrier’s insulation rating must be equal to orexceed the voltage rating of the switchgear.

iv) The words “METER INSIDE - CAUTION”are to be labeled in red or yellow on theoutside of any door leading in to a meterenclosure. Current and potential transformerenclosures shall be labeled “CT’s INSIDE” and“PT’s INSIDE”, respectively.

June 2010 43

17.5 Submission of Drawings

Prior to fabrication, the manufacturer isrequired to provide drawings to the utilityengineer for approval. The drawings shallshow the metering panel layout and wiringschematic.

17.6 Costs

Except for the instrument transformers, testswitches and associated wiring, all mountingfacilities required for revenue meteringoutlined herein are to form part of the basicswitchgear as required and is to be paid for bythe Customer.

E.D.:UTILITY SERVICE ENTRANCE STANDARD FIG. 1

SERVICE MAST EXTENDED REV.:THROUGH ROOF 00

EFF. DATE:June 2010


SERVICE POINT OF ATTACHMENT REV.:ON WALL 00

EFF. DATE:June 2010


PRE-WIRED, SINGLE PHASE REV.:120/240 VOLT 201 TO 600 AMP 00CURRENT TRANSFORMER EFF. DATE:CONNECTED ENCLOSURE June 2010


SINGLE PHASE REV.:120/240 VOLT 201 TO 600 AMP 00CURRENT TRANSFORMER EFF. DATE:

CONNECTED June 2010


THREE PHASE REV.:120/208 OR 347/600 VOLT 00

201 TO 1200 AMP EFF. DATE:June 2010

E.D.:UTILITY SERVICE ENTRANCE STANDARD FIG. 6CURRENT TRANSFORMER CONNECTED REV.:

MAY POLE, 120/240V 400 AMP 00EFF. DATE:June 2010

Notes:1. Interconnect butt ground and ground electrode with #6

copper.2. The current transformer will be supplied by the utility except

where it is part of the transfer switch and has the meteringaccuracy specified by Measurement Canada.

3. Customer owned conductors, service loops, groundingconductors, conduits, etc. shall be sized in accordance withthe requirements of NB Safety Code Services and TheCanadian Electrical Code.

4. The Customer installs the service equipment on the pole andleaves sufficient conductor at the transfer switch for theutility to make connections to the current transformer andservice loops.

5. Male receptacle for emergency power supply cable.6. The line conductors shall be black; the load conductors shall

be red or otherwise identified by permanent markings at allvisible locations.


SELF-CONTAINED MAY POLE REV.:120/240 TO 200 AMP 00

EFF. DATE:June 2010

Notes:

1. The Customers service conductors shall extend at least 750mmbeyond the service weatherhead.

2. The line conductors shall be black; the load conductors shall be redor otherwise identified by permanent markings at all visiblelocations.

3. Customer owned conductors, service loops, grounding conductors,conduits, etc. shall be sized in accordance with the requirements ofNB Safety Code Services and The Canadian Electrical Code.

4. The Customer installs the service equipment on the pole and theutility makes connections to the secondary and service loops.

5. Interconnect butt ground and ground electrode with #6 copper.6. Parallel masts are acceptable


CUSTOMER OWNED POLE REV.:FOR NON-FIXED PREMISE 00

EFF. DATE:June 2010


TEMPORARY SERVICE ENTRANCE REV.:TRIPOD MOUNTED 00

EFF. DATE:June 2010

Notes:

1. The main support shall consist of two 50mm x 150mm planksnailed together.

2. There shall be a minimum of three 50mm x 100mm supportbraces. Braces shall be bolted to the main support and the braceanchors using two-3/8” bolts or three-3” common nails.

3. Once brace shall be in line with the service loop.4. Brace anchors shall be at least 50mm x 100mm.5. Where a 3m-ground rod is used as a ground electrode, it shall be

driven below grade or kept close to the main support or a braceanchor to eliminate any tripping hazard. Ground plates are alsoacceptable as per CEC rule 10-702 (4).

6. The tripod should be located as close as possible to the utilityservice pole and within 27m.

7. The main support or braces shall not contain splices.8. The mast and weatherhead shall not extend beyond the center

support.9 . Where a temporary is supplied by underground service

conductors, the service conductors must be mechanicallyprotected as per the requirements of the CEC and theInspection Authority.


OUTDOOR METERING REV.:00EFF. DATE:June 2010


NB UTILITY METERING SUMMARY REV.:01EFF. DATE:June 2010

Electrician / ContractorMust Supply

No.ServiceEntrance

Description Meter Socket

CurrentTransformer

CabinetTypical

Installations

1 120/240 Volts4 Jaw Socket None Residentialsingle phase rated forup to 200 AmpsService entrance Commercial

Amps & Voltage

2a 120/240 Volts5 Jaw Socket 500 mm x 500 mm Residentialsingle phase rated 20 Amps (min.)201 to 600Amps

with provision fortest switch

Cabinet Commercial

OR2b 120/240 VoltsPre-wired Meter None Residential

single phase Socket / CT /Test

600 Amps Switch Commercial

3 120/208 Volttwo phase

5 Jaw Socketrated for

None Apartments

Up to 200Amps

service entranceAmps & Voltage

(Network)

4 120/208 or 7 Jaw Socket None Commercial347/600 Volt rated forThree Phase up Service Entrance Industrialto 200 Amps Amps & Voltage

5 120/208 or 13 Jaw Socket 760 mm x 760 mm Commercial347/600 Volt rated 20 Amps (min.)Three Phase201-1200Amps

with provision fortest switch

Cabinet Industrial


INSTALLATION OF METERING REV.:CURRENT TRANSFORMERS 00

EFF. DATE:June 2010


REV.:MUNICIPAL FESTIVE LIGHTING 00

EFF. DATE:June 2010

Notes:

1 . Receptacle to be installed in a CSA class 3 enclosure or aweatherproof outlet box c/w PVC weatherproof cover.

2. Place rigid PVC conduit as far away from telephone plant andreceptacle as close to lighting mounting bracket as is practical.

3 . Enclosures and conduits to be assembled by municipality formounting and connection by NB Power.

4. Wiring permit is required.5. #10 AWG copper conductors to supply receptacles.6. Where mounting bracket is made of conductive material it shall be

bonded to utility pole ground.7. A _” drain hole shall be installed in the bottom of the PVC outlet

box.8 . 750mm of wire to be provided for connection to secondary.

Additional 300mm required where open wire secondary exists.9 . Receptacles for supply of pole mounted festive lighting only.

Extension cords are not to be used to supply loads at ground level.10. Disconnecting means shall be integral with or adjacent to fuse.

Maximum 30A fuse. Fuse to be Class J type.

utility service entrance standards - nb power · customer: a customer is defined as the owner,...

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