item 634.8212 09 m-electrical power devices · item 634.8212 09 m-electrical power devices page 2...

ITEM 634.8212 09 M-ELECTRICAL POWER DEVICES

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DESCRIPTION Under this item the Contractor shall furnish all labor, materials and equipment for Electrical Power Devices, as shown on the Plans, as specified and/or directed by the Engineer which includes but is not limited to, the following general item of work:

1. Furnish and install Generator Backboard which includes generator automatic transfer switch, main disconnect switch, conduit, cables and accessories as specified and/or shown on drawings.

2. Furnish and install outdoor lighting system including outdoor luminaries, mounting

hardware, conduit and cables. 3. Install Owner furnished generator. Provide all cable termination and programming of

generator control panel including power and control. 4. Provide all equipment and structure grounding including grounding of service entrance,

electrical devices, and Main Control Panel (specified elsewhere). 5. Contractor shall coordinate electrical power utility service connection.

6. Furnish and Install 300kVA oil filled type pad mounted transformer, primary and

secondary duct bank.

7. Install secondary terminations to the transformer and the main disconnect. 8. Contractor shall coordinate electrical power utility service primary connections with

Endicott Light, Mr. Harry Andrews (607) 757-2455.

9. Contractor shall obtain approval from utility company for primary duct bank and transformer installation.

10. Contractor shall provide all power and control wiring to the Main Control Panel as

specified and as indicated on plans including all terminations. Contractor shall coordinate with Systems Integrator and pump station equipment suppliers for manufacturer’s wiring diagrams and requirements.

The publications listed below and their latest revisions form a part of this Specification to the extent referenced. The publications are referred to in the text by the basic designation only. Federal specification (Fed. Spec.): L-P-387A Plastic Sheet, Laminated, Thermosetting (for Design Plates) American National Standards Institute (ANSI) Publications: C37.20 Switchgear Assemblies, Including Metal-Enclosed Bus

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Deleted: ITEM 09634.8212 M –

Deleted: aluminum

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C57.12.26 Transformers- Pad –Mounted Compartmental-Type, Self-Cooled, Three –phase Distribution Transformer for Use with Separable Insulated High-Voltage Connectors, High-Voltage 34 500 Grd Y/19 920 Volts and below; 2500kVA and smaller.

Z35.1 Accident Prevention Signs Institute of Electrical and Electronics Engineers (IEEE) Publication:

100 Standard Dictionary of Electrical and Electronics Terms 386 Separable Insulated Connector Systems for Power Distribution Systems above

600V National Electrical Manufacturers Association (NEMA) Publication: ICS 6 Enclosures for Industrial Controls and Systems National Fire Protection Association (NFPA) Publication: 70B Electrical Equipment Maintenance 70 National Electrical Code MATERIALS A. Aluminum Backboard Assembly

An aluminum backboard complete with aluminum sheet backboard, support posts, mounting unistrut and fasteners, shall be constructed to the dimensions and of the materials as shown on the Plans. Support posts for the backboard shall be encased in concrete piers as shown on the Plans, constructed of Class “A” Concrete conforming to Section 501 of the NYSDOT Standard Specifications.

B. Automatic Transfer Switch (ATS)

1. General Provide automatic (D,G,H) transfer switch with the number of poles, amperage, voltage, and withstand ratings per the generator manufacturer as supplied by the Owner. Transfer switch shall conform to UL 1008 as a recognized component for emergency systems, rated for all classes of loads when installed in an unventilated enclosure. Electrical operation shall be accomplished by a non-fused momentarily energized solenoid direct operating or electric motor operated mechanism or stored energy operator. Mechanical locking in each direction shall be provided. Operation shall be double throw switching where normal and emergency contacts operate with no intentional delay in mid position. A separately mounted control unit shall include:

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nonadjustable, one-second time delay to override momentary dips in normal power source; phase voltage relay supervision of three phases of the normal source, relay shall dropout at 65 to 70 percent and pickup at 92 to 95 percent of nominal voltage to detect "brown-out" conditions; voltage/frequency lockout relay with 90 percent pick-up nominal, to prevent premature transfer; system test switch, momentary type; engine starting control contacts, one normally closed and one normally open; auxiliary pilot contacts rated 10 amperes at 480 volts a.c., one closed on normal and one closed on emergency; retransfer time delay to normal power source: adjustable from 2 to 25 minutes; full-rated neutral transfer contacts driven by the main contact shaft; adjustable time delay, 5 to 15 minutes, on shutdown of engine-generator after retransfer of the load to "normal"; and pilot lights to indicate source to which the load is connected. Manufacturer by Onan, OTPC Automatic transfer switch or equal as approved by the Engineer.

2. Accessories

Override Time Delay: Time delay to override monitored source deviation shall be adjustable from 0.5 to 6 seconds and factory set at 1 second. The device shall detect and respond to a sustained voltage drop of 30 percent of nominal voltage between any two of the normal supply conductors and initiate transfer action to the emergency source and start the engine-driven generator set after the set time period. The pickup voltage shall be adjustable between 85 and 100 percent of nominal and factory set at 90 percent. Transfer Time Delay: Time delay before transfer to the emergency power source shall be adjustable from 0 to 5 minutes and factory set at 0 minutes. The device shall monitor the frequency and voltage of the emergency power source and transfer when frequency and voltage is stabilized at or above 90 percent of rated values. The pickup voltage shall be adjustable from 85 to 100 percent of nominal, and factory set at 90 percent. The pickup frequency shall be adjustable from 90 to 100 percent of nominal and factory set at 90 percent. Provide time delay before return transfer to the normal power source shall be adjustable from 0 to 30 minutes and factory set at 30 minutes. The time delay shall be automatically defeated upon loss or sustained under-voltage of the emergency power source, provided that the normal supply has been restored. Provide engine shutdown time delay. Time delay shall be adjustable from 0 to 5 minutes and shall be factory set at 5 minutes. Provide Cranking Limit Time Delay. Time delay to limit cranking shall be adjustable from 0 to 5 minutes and set at 1minute in the factory. The Contractor shall provide this time limited feature as an accessory to the ATS assembly if it is not provided as an integral part of the Owner furnished engine control system. The system exerciser shall consist of a programmable time switch to start the engine-driven generator and to transfer the load from the normal to the emergency power source for a preset period of time at preset intervals. The design of the system exerciser shall include: manual start of the programmable time switch sequence, automatic starting of the exercise period is not acceptable; manual reset of the ongoing exercise period, reset provisions shall cause the ATS to return to the normal position if power is available to initiate transfer; automatic return of the ATS to the normal position if the generator set fails during the exercise period and power is available to initiate transfer. Provide two normally open and two normally closed auxiliary contacts. Contacts shall

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operate when the transfer switch is connected to the normal power source, and two normally open and two normally closed contacts shall operate when the transfer switch is connected to the emergency power source. Provide engine start contact, emergency power source monitor, test switch, close differential protection, time delay bypass switch, and manual return-to-normal switch. Under-voltage and timing relays, including any auxiliary relays required, shall be installed in the ATS enclosure to provide an adequate number and type of properly rated contacts to control the operation of remote motor controllers or starters shown. Devices and wiring in and external to the ATS shall cause motors to be de-energized for an adjustable period of time before the operation of the ATS in either direction and, subsequently, to cause motors connected to the ATS load bus to be energized immediately after transfer. A manual operator, conforming to the applicable provisions of UL 1008, shall be provided to permit manual operation of the ATS under either loaded or no-load conditions. The override switch shall bypass automatic transfer controls so the transfer switch will remain connected to the emergency power source, regardless of the conditions of the normal power source. A green indicating light shall supervise the normal power source and shall have a nameplate engraved NORMAL. A red indicating light shall supervise the emergency power source and shall have a nameplate engraved EMERGENCY. The switch and accessories shall be in a wall-mounted and unventilated NEMA ICS 6, Type 3R, smooth sheet metal enclosure constructed in accordance with UL 1008. Metal shall be not less than US Standard Gauge No. 14. Doors shall have hinges, locking handle latch, and gaskets at jamb, sill, and head. The enclosure shall be equipped with one grounding lugs grounding the enclosure using No. 4AWG copper conductors. A thermostatically controlled heater shall also be provided within the enclosure to prevent condensation over the temperature range stipulated in paragraph titled "SERVICE CONDITIONS". The Contractor's field wiring terminating within the enclosure shall comply with NFPA 70. If wiring is not color coded, wires shall be permanently tagged near the terminal at each end with the wire number shown on approved shop drawings. Terminal blocks shall conform to NEMA ICS 4. Terminal facilities shall be arranged for entrance of external conductors from the bottom of the enclosure. Main switch terminals, including the neutral terminal, shall be of the pressure type and suitable for the termination of copper conductors shown. The enclosure shall be constructed for convenient removal and replacement of contacts, coils, springs and control devices from the front without the removal of main power conductors or removal of major components.

C. Conduit

Exposed and direct buried conduit shall be plastic coated rigid hot-dipped galvanized steel conforming to the requirements of UL 6 and UL 1242, for threaded type, respectively, and shall be coated with a polyvinyl chloride (PVC) sheath bonded to the galvanized exterior surface, nominal 40 mils thick, conforming to NEMA RN 1, Type A40, except that hardness shall be nominal 85 Shore A durometer, dielectric strength shall be minimum 400 volts per mil at 60Hz, tensile strength shall be minimum 3500 psi, and aging shall be minimum 100 hours in an Atlas Weatherometer. Plastic duct for concrete-encased burial shall be PVC and shall conform to NEMA TC 6, Type EB. Fittings shall conform to NEMA TC 9. Plastic conduit for direct burial shall be PVC conforming to NEMA TC 2 (conduit) and NEMA TC 3 (fittings), Type EPC-80-PVC. Liquid-tight Flexible Metal Conduit, Steel shall be UL 360.

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Flexible Metal Conduit shall be UL 514B. Ferrous fittings shall be cadmium- or zinc-coated in accordance with UL 514B. Fittings for Rigid Metal Conduit shall be Threaded-type. Split couplings unacceptable. Materials shall be in conformance with Sections 723-19 and 723-20 of the NYSDOT Standard Specifications. Conduit excavation, backfill, and surface restoration shall conform with Section 206 of the NYSDOT Standard Specifications. Hazardous Locations: Electrical materials, equipment, and devices for installation in hazardous locations, as defined by NFPA 70, shall be specifically approved by Underwriters’ Laboratories, Inc., or Factory Mutual for particular “Class”, “Division”, and “Group” of hazardous locations involved. Boundaries and classifications of hazardous locations shall be as indicated.

D. Conductors

Conductors shall be rated 600 volts and less, including service entrances, shall conform to UL 854, Type USE. Conductor size and number of conductors in each cable shall be as indicated. Cable shall be color coded. Conductor identification shall be provided within each enclosure where a tap, splice, or termination is made. Conductor identification shall be by color-coded insulated conductors, plastic-coated self-sticking printed markers, colored nylon cable ties and plates, or heat shrink type sleeves. Control circuit terminations shall be properly identified. All conductors shall be stranded copper.

Colors for coding conductors shall be:

480-VOLT SYSTEM:

Neutral - White Phase A - Brown Phase B - Orange Phase C - Yellow

120/240 VOLT, single phase: red and black

Grounding Conductor - Green

Insulation: Unless specified or indicated otherwise or required by NFPA 70, power and lighting wires shall be 600-volt, Type THW, THWN, XHHW, or RHW, except that grounding wire may be Type TW; remote-control, and signal circuits shall be Type TW, THW, or TF. Conductors shall conform to UL 83. Where lighting fixtures require 90-degree C conductors, provide only conductors with 90-degree C insulation or better.

E. High Voltage Cable

Cable for 4.16 kV underground distribution system shall be cross-linked-thermosetting-polyethylene-insulated cable conforming to NEMA WC 7, as applicable, and AEIC CS5. Cable shall be single conductor, employing concentric, Class B stranded copper conductor. Cable shall have conductor and insulation shielding. Insulation shielding shall be metal tape type consisting of a concentric serving of tape according to NEMA WC. Cable shall be rated

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15kV with insulation and jacket thickness of 100% and 175 mils, respectively. Cable shall have a polyvinyl chloride jacket.

F. Cabinets, Junction Boxes, and Pull Boxes

Shall have a volume greater than 100 cubic inches, UL 50, hot dip, zinc-coated, if sheet steel. Required NEMA ratings and dimensions are as shown on plans.

G. Main Disconnect Switch (MDS)

Provide service entrance rating disconnect switch with service-rated class RK-1 fuses. Service entrance disconnect shall be label as such, provide surge arrestor manufactured by Square D SDSA3650 or equal as approved by the Engineer. Provide NEMA 3R enclosures. Provide laminated plastic labels. Use lettering of at least 0.25 inch in height, and engrave on black-on-white matte finish. Manufacture by Square D, class 3110, or equal as approved by the Engineer.

H. Receptacles

Provide UL 498 and NEMA WD1, heavy duty, hospital grade, grounding-type. Ratings and configurations shall be as indicated. Wiring terminals shall be screw-type, side wired. Connect grounding pole to mounting strap. Provide ground fault circuit interrupter (GFCI) for all outdoor installations. GFCI shall be UL 943, duplex type for mounting in standard outlet box. Device shall be capable of detecting current leak of 6 milliamperes or greater and tripping per requirements of UL943 for Class A GFCI devices. Provide cast metal box with gasketed, weatherproof, cast-metal cover plate and gasketed cap over each receptacle opening. Caps shall be provided with a spring-hinged flap. Receptacle shall have a cover, UL listed for use in “wet locations”.

I. Grounding

Provide UL and NEC approved types, copper, with TW, THW, XHHW or dual rated THHN-THWN insulation color identified green. Ground rods shall be copper clad steel, ¾ inch diameter by 10 feet long. Main Bonding Jumper: Connect the secondary service neutral to the ground bus in the service equipment. Service Disconnect (Separate Individual Enclosure): Provide a ground bar bolted to the enclosure with lugs for connecting the various grounding conductors. Connect metallic conduits, which terminate without mechanical connection to the housing, by grounding bushings and ground wire to the ground bus. Ground all metallic conduit systems.

Non-metallic conduit systems shall contain a grounding conductor. Conduit provided for mechanical protection containing only a grounding conductor, bond to that conductor at the entrance and exit from the conduit.

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Feeders and Branch Circuits: Install green grounding conductors with feeders and branch circuits as follows:

a. Feeders b. Branch Circuits c. Receptacle Outlets d. Directly Connected Equipment, Appliances and Devices e. Motors and Motor Controllers f. Fixed Equipment and Appurtenances g. Items of equipment where the final connection is made with flexible metal conduit

shall have a grounding wire. h. Additional locations and systems as shown

Boxes, Cabinets, Enclosures and Panelboards: Bond the grounding wires to each pull box, junction box, outlet box, cabinets, and other enclosures through which the ground wires pass. Provide lugs in each box and enclosure for ground wire termination. Provide ground bars in panelboards, bolted to the housing, with sufficient lugs for terminating the ground wires. Motors and Starters: Provide lugs in motor terminal box and starter housing for ground wire termination. Make ground wire connections to ground bus in motor control centers. Receptacles are not approved for grounding through their mounting screws. Ground with a ground wire from green ground terminal on the receptacle to the outlet box ground screw. Ground lighting fixtures to the green grounding conductor of the wiring system. During renovation, provide the green ground if it is not part of the system, or ground the fixtures through the conduit systems per means acceptable under the NEC. Fixtures connected with flexible conduit shall have a green ground wire included with the power wires from the fixture through the flexible conduit to the first outlet box. Fixed electrical appliances and equipment shall have a ground lug installed for termination of the green ground conductor. Grounding system ground resistance must comply with NEC. Services at power company interface points shall comply with the power company ground resistance requirements. Make necessary modifications to the ground electrodes for compliance that is needed without additional cost to the Owner, including the provisions of a multi-rod system. Drive each rod vertically in the earth for not less than ten feet in depth. Where permanently concealed ground connections are required, make the connections by the exothermic process to form solid metal joints. Make accessible ground connections with mechanical pressure type ground connectors. Where rock prevents the driving of vertical ground rods, install grounding electrodes in horizontal trenches to achieve the specified resistance.

J. Luminaries

Provide complete luminaire assembly including housing, lamp, ballast, photocell switch and mounting hardware. Luminaries shall be High Intensity Discharge (HID). HID ballast shall be UL 1029 and ANSI C82.4, shall be constant wattage autotransformer (CWA) or regulator, high power factor type. Provide single-lamp ballasts which shall have a minimum starting temperature of minus 30 degrees C. Ballast shall be constructed so that open circuit operation will not reduce their average life. Provide High Pressure Sodium lamp rating as shown on drawing. Material shall be in conformance with section 723-27 of the NYSDOT

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standard specifications. Photocell shall be UL773 or UL 773A, hermetically sealed cadmium-sulphide cell rated 277 volts ac, 60 hertz with single-throw contacts rated 4500 watts, and 277 volts. Mount switch in a high-impact-resistant, noncorroding and nonconductive molded plastic housing with an EEI-NEMA locking-type receptacle. The switch shall turn on below 3 footcandles and off at 3 to 10 footcandles. A time delay shall prevent accidental switching from transient light source. Mount a directional lens in front of the cell to prevent fixed light sources from creating a turnoff condition. Aim switch according to manufacturer’s recommendations. Provide wire guard for lens to protect against breakage.

K. Pad Mounted Transformer (300 kVA)

Provide outdoor type, tamper resistant, consisting of a high-voltage (incoming) compartment, a transformer section, and a low-voltage (outgoing) compartment separated by full height isolating barriers. Compartments shall be assembled and shipped by one manufacturer as a unit, completely weatherproof and tamperproof for mounting on a concrete pad without additional housing, fences or other enclosures. Unit shall conform to applicable portions of ANSI C57.12.26. Component ratings shall be as indicated, and as specified herein. Transformer shall be 3-phase, two winding, 60 Hz, 65 degree C rise, oil insulated, self-cooled type rated 300 kVA capacity, High voltage 5 kV wye primary, with standard primary taps, 480/277 Volts wye secondary; 5.6% minimum impedance. Transformer shall meet the following criteria:

a. Mineral Oil: ASTM D3487, Type II tested in accordance with ASTM D117. b. Undercoating: Coat the underside of transformer bases with a 4mil thick coating

conforming to Mil. Spec. MIL-P-28641. c. Nameplate: provide nameplate conforming to ANSI C57.12, except indicate the

number of gallons of coolant. d. The transformer shall be designated to meet the sound level standards for liquid

transformers as defined in NEMA and ANSI. e. High voltage and low voltage windings shall be copper insulation between layers

of the windings. Insuldur paper or equal. f. The transformer tank and attached components shall be designated to withstand

pressure 25% greater than the required operating design value without permanent deformation. Construction shall consist of carbon steel plate reinforced with external sidewall braces. All seams and joints shall be continuously welded.

g. Each radiator assembly shall be individually welded and receive a quality control pressurized check for leaks. The entire tank assembly shall receive a similar leak test before tanking. A final six-hour leak test shall be performed.

h. The transformer(s) shall be compartmental-type, self-cooled and tamper-resistant for mounting on a pad. The unit shall restrict the entry of water (other than flood water) into the compartments so as not to impair its operation. There shall be no exposed screws, bolts or other fastening devices, which are externally removable.

i. The transformer shall consist of a transformer tank and full-height, bolt-on high- and low-voltage cable terminating compartments located side-by-side separated by a rigid metal barrier. Each compartment shall have separate doors, designed to provide access to the high-voltage compartment only after the low-voltage has

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been opened. There shall be at least one additional fastening device accessible only after the low-voltage door has been opened, which must be removed to open the high-voltage door. Doors shall be mounted flush with the cabinet frame. The low-voltage door shall have a handle-operated, three-point latching mechanism designed to be secured with a single padlock. A hexhead bolt shall be incorporated into the low-voltage doors latching mechanism. Both high- and low-voltage doors shall be incorporated into the low-voltage doors latching mechanism. Both high- and low-voltage door shall be equipped with lift-off type stainless steel hinges and door stops to secure them in the open position.

j. Compartments sills, doors and covers shall be removable to facilitate cable pulling and installation. Compartments shall be designated for cable entry from below and shall be sized to the minimum dimensions of ANSI Standard C57.12.26.

k. Transformer shall be supplied with a welded main tank cover and be of a sealed-tank construction designed to withstand a pressure of 7 psig without permanent distortion. The tank cover shall be domed to shed water and be supplied with a tamper-resistant access handhole sized to allow access to internal bushing and switch connections. The transformer shall remain effectively sealed for a top-oil temperature of –5 degrees C to 105 degrees C. When necessary to meet the temperature rise rating specified above, flat cooling panels of the common header type shall be provided.

l. The transformer manufacturer shall certify that the transformer is non-PCB containing no detectable PCBs. Do not provide nonflammable transformer liquids including askarel and insulating liquids containing tetrachloroethylene, perchloroethlene, chlorine compounds, or halogenated compounds.

m. The coil windings shall be of the two winding type, designed to reduce losses and manufactured with the conductor material as specified above. The winding shall incorporate a secondary sheet conductor for 600V class secondary to maximize short-circuit strength. For higher-voltage class secondary, strap conductors shall be utilized. All insulating materials shall be rated for 65 degrees C rise, 80 degrees C hot-spot operation.

n. For grounded wye to grounded wye application the core assembly shall be 4- or 5-legged, distributed-gap, wound core, designed with a low flux density to minimize noise.

o. The core material shall be high-grade, grain-oriented, non-aging silicon core steel with high magnetic permeability, low hysteresis and eddy current losses. Magnetic flux densities are to be kept well below saturation to allow for a minimum of 10 percent overvoltage excitation. The cores shall be properly annealed to reduce stresses induced during the manufacturing processes and reduce core losses.

p. The core frame shall be designed to provide maximum support of the core and coil assembly. The core frame shall be welded or bolted to ensure maximum short-circuit strength.

q. The core and coil assembly shall be designed and manufactured to meet the short-circuit requirements of ANSI Standard C57.12.90. The core and core assembly shall be baked in an oven prior to tanking to “set” the epoxy coating on the Kraft paper and remove moisture from the insulation prior to vacuum filling.

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r. Transformer shall be manufactured by Square D, GE or approved equal. Rebuilt and/or refurbished transformer shall be acceptable a minimum 2 year warranty, as provided by T&R (1-800-843-7994), Jerry’s Electric (1-800-843-9884) or other approved source.

CONSTRUCTION DETAILS

A. Submittals Submittal data shall be provided to show compliance with this Specification, Contract Plans, or other Specifications.

Automatic Transfer Switch: Shop Drawings for ATS shall include certified outline, electrical ratings, general arrangement, and detail drawings.

• Certificates of Conformance - submit for ATS as proof of compliance with UL and NEMA standards as specified. Certificates are not required if manufacturer's published data submitted and approved reflect a UL listing and conformance with applicable publications of NEMA.

• Certified Test Reports - Submit for each rating of ATS, the reports of tests required by UL 1008 and by the additional requirements listed below. The proof of listing by UL shall be submitted and will be acceptable evidence that the ATS conforms to UL requirements.

• Withstand and Closing Tests Above UL-1008: The ATS shall be rated for use on a circuit having an available short circuit current of 200k amperes RMS symmetrical at 20 percent power factor for a duration of 3 cycles when coordinated with molded case circuit breakers, 10 cycles when coordinated with power circuit breakers, and 0.5 cycle when coordinated with current limiting fuses. The withstanding and closing tests shall be conducted at full rated system voltage in accordance with UL-1008. The 3- and 10-cycle tests shall be conducted without contact damage.

• Dielectric Withstand Test: The dielectric withstand test shall be repeated in accordance with UL-1008, after the withstand test specified in paragraph titled "Withstand and Closing Tests above UL-1008". Non-Welding of Contacts: Automatic transfer switches shall be rated for non-welding of contacts when used with the feeder over current devices indicated on the drawings and with the available fault current specified herein.

Pad Mounted Transformers: Shop drawings shall indicate, but not be limited to the following:

• Overall transformer dimensions, front view, and sectional views with weights. • Elementary diagrams and wiring diagrams with terminals identified, and indicating

internal wiring for and interconnection between each item of equipment. • Certified Laboratory Test Reports: submit certified copies of the following ANSI

C57.12.00 and C57.12.90 transformer test: a. Routine Test: Certify that routine tests shall be conducted by the manufacturer on

each transformer to insure that design performance is maintained in production. b. Design Tests: Submit design test reports for certification of conformance to

design test requirements.

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Provide Manufacturer’s Catalog Data: a. Insulated conductors. b. High Voltage Cable c. Conduit and fittings (each type) d. Junction boxes. e. Fuses f. Luminaries.

Field test report: a. 600-volt wiring test b. Grounding system test.

B. Installation

All installation shall conform to the requirements of NFPA 70 and manufacturer's recommendations.

Underground duct without concrete encasement shall be installed such that the top of the conduit shall be not less than 24 inches below grade, shall have a minimum slope of 3 inches in each 100 feet away from buildings and toward manholes and other necessary drainage points, and shall run in straight lines except where a change of direction is necessary. As each conduit run is completed, a testing mandrel not less than 12 inches long with a diameter 1/4 inch less than the inside diameter of the conduit shall be drawn through each conduit, after which a stiff-bristled brush shall be drawn through until the conduit is clear of earth, sand, or gravel particles. Conduit plugs shall then immediately be installed. Ensure a minimum 3-inch clearance from the conduit to each side of the trench. Grade the bottom of the trenches smooth; where rock, soft spots, or sharp-edged materials are encountered, excavate the bottom for an additional 3 inches; fill with sand or earth, free from particles that would be retained on a 1/4-inch sieve; and tamp level with the original bottom. Under roads, paved areas, and railroad tracks, install conduits in concrete encasement of rectangular cross-section providing a minimum of 3-inch concrete cover around ducts. The concrete encasement shall extend at least 5 feet beyond the edges of paved areas and roads, and 12 feet beyond the rails on each side of railroad tracks. Conduits to be installed under existing paved areas which are not to be disturbed, and under roads and railroad tracks, shall be zinc-coated, rigid steel, jacked into place. Hydraulic jet method shall not be used. Underground Duct with Concrete Encasement: shall be constructed of individual conduits encased in concrete. Except where rigid galvanized steel conduit is indicated or specified, the conduit shall conform to NEMA TC 6, Type EB. The type of conduit used shall not be mixed in any one duct bank. Ducts shall be a minimum of 4 inches in diameter unless otherwise indicated. The concrete encasement surrounding the bank shall be rectangular in cross-section and shall provide at least 3 inches of concrete cover around ducts. Separate conduit by a minimum concrete thickness of 2 inches, except separate light and power

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conduits from control, signal, and telephone conduits by a minimum concrete thickness of 3 inches. The top of the concrete envelope shall be a minimum of 18 inches below grade, except under roads and pavement, concrete envelope shall be a minimum of 24 inches below grade. Duct banks shall have a continuous slope downward toward underground structures and away from buildings with a minimum pitch of 3 inches in 100 feet. Except at conduit risers, changes in direction of runs exceeding a total of 10 degrees, either vertical or horizontal, shall be accomplished by long sweep bends having a minimum radius of curvature of 25 feet; sweep bends may be composed of one or more curved or straight sections or combinations thereof. Manufactured bends shall have a minimum radius of 18 inches for use with conduits of less than 3 inches in diameter and a minimum radius of 36 inches for ducts of 3 inches in diameter and larger. Excavate trenches along straight lines from structure to structure before ducts are laid or structure constructed so the elevation can be adjusted, if necessary, to avoid unseen obstruction.

Conductor Identification: Provide conductor identification within each enclosure where tap, splice, or termination is made. For conductors No. 6 AWG and smaller diameter, color coding shall be by factory-applied, color-impregnated insulation. For conductors No. 4 AWG and larger diameter, color coding shall be by plastic-coated, self-sticking markers; colored nylon cable ties and plates; or heat shrink-type sleeves. Identify control circuit terminations. Make splices in accessible locations. Make splices in conductors No. 10 AWG and smaller diameter with insulated, pressure-type connector. Make splices in conductors No. 8 AWG and larger diameter with solder less connector, and cover with insulation material equivalent to conductor insulation. Transformer installation shall conform to manufacturer recommendations and IEEE C57.94. Contractor shall coordinate mounting with Endicott Light. Contractor shall verify that concrete pad is ready to receive transformer. Install transformer plum and level. Install safety labels to NEMA 260. Install primary duct bank and coordinate terminations at the pole and the primary compartment of the transformer with Endicott Light. Furnish and Install secondary duct bank and make all necessary terminations in the secondary compartment of the transformer.

C. Testing, Start-up, and Initial Operation Supervision

ATS Field Test and Inspection: The Contractor shall furnish labor, equipment, and incidentals for, and shall perform all field tests. The Contractor shall give the Engineer seven (7) calendar days notice of the times scheduled for tests so that the Engineer may be present. Work affected by deficiencies shall be completely retested at the Contractor's expense. The manufacturer's factory representative shall assist the Contractor with the field test and inspection. Field tests shall include the following:

a. Simulate power failure and demonstrate complete ATS operation. Contractor shall

show by demonstration in service that the ATS are in good operating condition, and functions not less than five times.

b. Conduct 1-hour load run utilizing Contractor-furnished portable load banks with each power source as follows: 1) One-half load: half hour

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2) Full load: half hour Test on 600-volt Wiring: Test 600-volt wiring to verify that no short circuits or accidental grounds exist. Perform insulation resistance tests on wiring No. 6 AWG and larger diameter using instrument which applies voltage of approximately 500 volts to provide direct reading of resistance. Minimum resistance shall be 250,000 ohms.

Contractor shall coordinate start up and testing of equipment under this Section with pump station start up.

Contractor shall provide 3 copies of the Operation and Maintenance manual which shall include all wiring diagrams, technical data and manuals, manufacturer’s warranties, start up and test reports.

Contractor shall provide Owner with one (1) - four hour training session on equipment specified under this Section to thoroughly instruct the Owner’s operating personnel in operation and maintenance of the electrical equipment. Perform the following test for the transformer:

a. Winding-resistance tests for each winding at nominal tap setting. b. Individual excitation current test on each phase.

c. Power factor or dissipation-factor test in accordance with manufacturer’s instruction.

METHOD OF MEASUREMENT Payment will be made at the lump sump price bid for this item of work. Progress payments will be made for this item in proportion to the amount of work done as determined by the Engineer to an amount equivalent to 80 percent of the price bid for this item. The remaining 20 percent will be paid when system testing, system start-up, and owner training has been completed. BASIS OF PAYMENT The lump sum price bid for this item shall include all labor, materials, equipment, and services required for complete installation of all electrical devices, including all fees for inspection, service connections, licenses, electrical energy and any other cost incurred in constructing/installing electrical devices ready for their intended use.

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Comment [EAP10]: Why a load

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[1] Formatted MARYLIN A. RUPERT 3/17/2004 9:02:00 AM Font: (Default) Arial, 11 pt, Bold, Underline

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ITEM 09634.8212 M – ELECTRICAL POWER DEVICES.

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distribution switch,


transformer, aluminum panelboard,





metal piping, conduits, generator pad, aluminum backboard, fence, pump control panel backboard.


Page 1: [17] Comment [EAP1] ERIC A. POND 3/16/2004 8:14:00 AM I thought DOT was doing this?



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Page 1: [24] Comment [EAP2] ERIC A. POND 10/4/2004 3:07:00 PM I thought DOT was doing this?



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control

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panel









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t


s

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3. Excavating, Backfilling, and Compacting. Excavate underground structures to depths indicated. If hard material is encountered, the provisions of the contract respecting an adjustment for changed conditions shall apply, subject to the requirements of notification



[94] Deleted BRIAN J. SKIDMORE 3/17/2004 5:56:00 PM

there under being given. Hard material shall be defined as solid rock; firmly cemented unstratified masses; conglomerate deposits possessing the characteristics of solid rock not ordinarily removed without systematic drilling and blasting; or any boulder, masonry, or concrete (except pavement) exceeding 1/2 cubic yard in volume. Excavated materials not required or suitable for backfill shall be removed from the project site. Provide sheeting and shoring as necessary for protection of work and safety of personnel. Remove water from excavation by pumping or other approved method. Backfilling around structures shall consist of earth, loam, sand-clay, or sand and gravel, free from large clods of earth or stones over 1 inch in size. Backfill materials shall be placed symmetrically on all sides in loose layers not more than 9 inches deep. Each layer shall be moistened, if necessary, and compacted with mechanical or hand tampers to 90 percent compaction. Backfilling trenches shall place backfill in layers not more than 6 inches thick, and compact each layer. Backfilling shall progress as rapidly as the construction, testing, and acceptance of the work permits. Backfill shall be free from roots, wood scrap material, and other vegetable matter and refuse. Compaction of backfill shall be to 80 percent of ASTM D698 density. The first layer shall be earth or sand, free from particles that would be retained on a 1/4-inch sieve and extending not less than 3 inches above the top of the conduit or cables. The succeeding layers shall be excavated material having stones no larger than would pass through a 4-inch ring. The backfill may be moistened. The backfill shall be level with the adjacent surface, except that in sodded areas, leave a space equal to the thickness of the sod.



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F



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for the main distribution switch




. Provide heavy duty-type disconnect switch with RK-5 fuses for other distribution switches. Provide NEMA SK1 disconnect switches.







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Transformer



. Provide NEMA TP1, energy efficient, dry-type, self-cooled. Provide transformer in NEMA





3R enclosure. Transformer shall have 180 degrees C insulation system for transformers rated 10 kVA and less, with temperature rise not exceeding 150 degrees C under full-rated load in maximum ambient of 40degrees C. Manufacture by Square D, dry type transformer, class 7400 or equal.

Panelboard. UL 67, UL 50 and UL 869. Panelboard shall be circuit breaker-equipped as necessary for devices to be powered. Design shall be such that individual breakers can be removed without disturbing adjacent units or without loosening or removing supplemental insulation supplied as means of obtaining clearances as required by UL. Make provisions for future installation of minimum six (6) breakers. Directories shall be typed to indicate load served by each circuit and mounted in holder behind transparent protective covering. Manufacture by Square D, NF, or equal. Panelboard Buses: Support bus bars on bases independent of circuit breakers. Main buses and back pans shall be designed so that breakers may be changed without machining, drilling, or tapping. Provide isolated neutral bus in each panel for connection of circuit neutral conductors. Provide separate ground bus identified as equipment grounding bus per UL 67 for connecting grounding conductors; bond to cabinet. Circuit Breakers: FS W-C-375 thermal magnetic-type with interrupting capacity of 10,000 amperes symmetrical minimum. Breaker terminals shall be UL listed as suitable for type of conductor provided. Plug-in circuit breakers unacceptable. Multipole Breakers: Provide common trip-type with single operating handle. Breaker design shall be such that overload in one pole automatically causes pole to open. Maintain phase sequence throughout each panel so that any three adjacent breaker poles are connected to Phase A, B, and C, respectively.

Circuit Breaker with GFCI: UL 943 and NFPA 70. Provide with “push-to-test” button, visible indication of tripped condition, and ability to detect and trip on current imbalance of 6 milliamperes or greater per requirements of UL 943 for Class A GFCI devices





















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(

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(








Transformer Tests: Perform tests classified as routine in accordance with NEMA ST20 on each transformer.







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for electrical power devices shall be made on a lump sum basis







Progress payments will be made for this item in proportion to the amount of work done as determined by the engineer.





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item 634.8212 09 m-electrical power devices · item 634.8212 09 m-electrical power devices page 2...

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