SECTION 706: SIGNAL AND LIGHTING SERVICE SYSTEMS
706.1 Description
This Work consists of bringing el ectricity to the Project (Powe r Service Installation), providing and installing servic e poles, service connections, an d lighting control cabinets.
706.2 Materials
706.2.1 Service Pole
The Contractor shall use timber poles treated in accordance wit h AASHTO M 133 or AWPA Standard U1, Commodity Standard D: Poles. The Contractor shall provide service requirements for Traffic S ignals and Lighting Systems. The Contractor shall provide service in accordance wi th the Plans or as required by the servicing utility. The Contractor shall provide a ci rcuit breaker type service swi tch or a type HD disconnect switch with fuses. The Contractor shall enclose the service sw itch in a NEMA rain-tight housing with a hinged cover. The Contractor shall ensure the c over stays in position when open and has a hasp for a padlock. The Contractor shall provid e UL-approved switches and housings.
706.2.2 Service Riser
The Contractor shall provide the service in accordance with the Plans or as required by the servicing utility.
706.2.3 Meter Pedestal
The Contractor shall provide Materials for meter pedestals in a ccordance with the NEC® and the following: 1. Provide meter pedestals made of 12-gauge hot dipped galvaniz ed steel, 1/8” aluminum, or 304D stainless steel; 2. Fully welded construction with welding Material specifically designed for Material used; 3. All fasteners, latches, and hardware are made of stainless s teel and all hinges are continuous interior or piano style; 4. No exposed nuts, bolts, screw s, rivets or other fasteners on the exterior; 5. Fully framed side hinged cabinet doors equipped with neopren e flange compressed gaskets and 2,000lb stress rated hasps; 6. Enclosure shall be factory wired and conform to required NEM A and UL 508A Standards; 7. Provide a meter socket with a minimum rating of 100 A or 200 A as required in the Contract or the demand of the system; 8. Main breakers shall be one (1), two (2), or three (3) poles; 9. Provide separate metered main , lighting main & disconnects a s required; 10. Cable in/cable out circuit breakers Standard; 11. Circuit breakers installed in a vertical position handle up for on, handle down for off; 12. Circuit breakers are i ndustrial grade, full rated; Section 706: Signal and Lighting Service Systems Page 806 13. All bussing is UL approved c opper cable bussing, fully rate d; 14. Distribution panel with deadfront panel and ¼ turn latch; 15. Wiring will be NEMA IIB Standar ds showing connections to ex ternal Equipment; 16. Control wiring is 19 strand #12 or #14 AWG MTW; 17. Functions of circuit break ers, switches and other component s as required shall be clearly identified by engraved nameplates; and 18. As-built factory drawings enclosed.
706.2.4 Service Connection
The Contractor shall provide se rvice connections to transformer s and power sources in accordance with the Plans and the NEC®.
706.2.5 Lighting Control Cabinet
The Contractor shall provide Materials for lighting control cab inets in accordance with the Plans, the NEC®, and the following: 1. Cabinets of 14-gauge steel with a corrosion-resistant durabl e finish; 2. Ground-mounted, tamper-proof, lockable cabinets approved by the Rural Electrification Administration; 3. Stainless steel cabinet hardware, including the hinges; 4. Mounting brackets for attaching contactors, photoelectric ce lls, junction boxes, and other auxiliary Equipment; and 5. Enclosure shall be factory wired and conform to required NEM A and UL 508A Standards.
706.2.6 Photoelectric Controller
The Contractor shall provide a photoelectric unit that consists of a light sensitive element connected directly to an internal control relay without interme diate amplifications. The Contractor shall provide either the horizontal sensing or zenit h sensing type of unit with turn-on at 1.5 fc ± 0.5 fc and a turn-off at a maximum of 5.6 f c. The minimum Acceptable difference between turn-on and turn-off is 0.8 fc. The minimum Acceptable load rating is 1,800 W (HID load). The Contractor shall provide the unit base with a three (3)-pro ng, NEMA Standard, twist lock type plug mounting so that the unit mounts directly on Lum inaires, or with an adapter base, on pole tops or sides. The Contractor shall ensure that the controllers normally Work in conjunction with external auxilia ry load relays for handling th e required lighting loads. The Contractor shall ensure that the supply voltage rating is t he same as the system voltage specified in the Contract. The minimum operating tempe rature range is from -40 °F to 140 °F. The Contractor shall ensure that the power consumption of the controller is less than 12 W. The Contractor shall ensure that the lighting load turns on whe n the north sky illumination in the area falls to a preset value. The Contractor shall prov ide a potentiometer that is easily accessible for adjustment to vary the turn-on value within the operating range. The Contractor shall incorporate a time Delay into the circuit to prevent stre etlights from turning off at night when transient lights are focused on the controller. The Contr actor shall ensure that the controlled lighting load remains on or becomes energized, if an y functional failure occurs in the Section 706: Signal and Lighting Service Systems Page 807 electronic circuit. The Contra ctor shall equip the controller with a lightning arrestor capable of handling 500 V at 35,000 A.
706.2.7 Auxiliary Contactor
The Contractor shall ensure t hat the auxiliary Contactor has th e following properties: 1. Works in conjunction with a photoelectric controller and the specified lighting loads; 2. Is normally open and double pole; and 3. Is the electrically held type, designed to withstand lamp lo ad inrush current and to carry full rated current on a continuous basis. The Contractor shall provide a three (3)-position switch to per mit manual operation of the lighting circuit with an indica ting nameplate reading “PHOTO-OF F-MANUAL.” The Contractor shall use a toggle or rotary ty pe switch with double-pole, trip le-throw, and center-off position.
706.3 Construction Requirements
706.3.1 General
The Contractor shall pay the local power company for Power Serv ice Installation. The Contractor shall obtain a detailed estimate from the local powe r company. The electrical service points shown in the Contract are approxi mate. The Contractor shall obtain the exact locations f rom the electric utility. Th e Contractor shall obtain approval of the final location from the Project Manager before beginning th e service installation Work. If a major change in location from that specified in the Contract is necessary, the Project Manager will determine the final locati on and adjust the service run. The Contractor shall obtain the necessary permits and schedule electrical inspections required for service attachment. The Contractor shall obtain t he approval of the Project Manager before hook-up. The Contractor shall provide t he electric utility with the name of the Maintaining Agency, as the customer of record, in accordance with Section 705.3.4, “Responsibility for Utility and Maintenance.”
706.3.2 Service Pole Installations
The Contractor shall attach the conduit to the pole, as specifi ed in the Contract. The Contractor shall securely mount the conduit to the pole surface and bond it to the service pole ground system, as required by the NEC®. The Contractor shall provide and install conduits, covers, gask ets, switches, fittings, and necessary Equipment. The Contractor shall refer to the Contrac t for layout, connections, and mounting details of the various s witches and associated Equipme nt. The Contractor shall use rigid steel, galvanized conduit of the specified size for above ground service installations. W here rigid steel conduit is cou pled to rigid PVC conduit used for the underground portion of the service run, the Contractor shal l join the conduits underground at a depth of from two (2) inches to ten (10) inches below the surface. The Contractor shall provide and install meter sockets required by the serving utility company as specified in the Cont ract. The serving utility comp any will supply and install the meters.
706.3.3 Service Riser
The Contractor shall install se rvice risers on existing poles a t the required locations, in accordance with Section 706.3.2, “ Service Pole Installations.” The Contractor shall install service risers on the quadrant o f the existing pole directed by the service utility company.
706.3.4 Meter Pedestal
The Contractor shall install meter pedestals at the locations s pecified and in accordance with the Contract. The Contractor shall install the pedestals at least ten (10) ft from the service pole.
706.3.5 Power Service Installation
The Contractor shall coordinate with the local public agency (L PA) and the utility company prior to service connection.
706.3.6 Lighting Control Cabinets
The Contractor shall install the lighting control cabinets at t he locations specified in the Contract or as directed by the Project Manager. The Contractor shall install the cabinets plumb on a concrete foundation with necessary grout or caulking to provide a weather- resistant, dust-tight installation.
706.4 Method of Measurement
Power Service Installation will be paid for complete in place.
706.5 Basis of Payment
Pay Item Pay Unit Service Pole____ (type) Each Service Riser____ (type) Each Meter Pedestal____ (type) Each Lighting Control Cabinet Each Power Service Installation Lump Sum For Power Service Installation the Contractor shall be paid th e actual amount charged by the local power company for the Work.
706.5.1 Work Included in Payment
The following Work and items will be considered as included in the payment for the main items and will not be measured or paid for separately: 1. All Materials required for a complete installation including meter sockets and disconnect switches , if required; 2. Concrete pads for lighting control cabinets; and 3. Service connections and Power Service Installation coordinat ion will be considered as included in the cost of the main items and will not be measu red or paid for separately. Section 707: Signal and Lighting Standards Page 809