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PART 4 - EXECUTION 4 . 1 INSTALLATION The entire system is to be installed in accordance with the manufacturer' s written instructions . 4 . 2 Electrical A. System Design 1 . The electrical system equipment shall consist of: a . Conductors and conduit from the main service transformer to the service entrance panel board . b . The service entrance panel board with appropriate individual circuit over- current protection . The panel board shall meet local and National Electrical Code ( NEC ) requirements for the size of the service , AIC rating , and the type of the environment to which it will be exposed . Electrical switchgear housing will be mounted either on a galvanized angle iron , a minimum of W thick , with hardware that is either stainless steel or hot dipped galvanized . All feeder breakers shall be bolt on type . C . Conductors and conduit for the feeder and control circuits from the service entrance panel board to the lighting control contactors . Lighting control contactors , supplied by the sports lighting manufacturer, shall be sized per local codes and the NEC according to the circuit amperage . The contactors shall be rated for lighting applications and shall be housed in a NEMA 4 enclosure . d . Conductors and conduit for the feeder circuit from the service entrance panel board ( or from the contactor panel if applicable ) to the safety disconnect mounted in the electrical enclosure on each lighting pole 10 ' above grade . e . Grounding conductors and grounding methods for the following : 1 . The main service entrance panel board . ( per NEC or local codes ) 2 . The lighting contactor enclosure . ( per NEC or local codes) 3 . Each electrical component enclosure mounted on the lighting poles . ( Equipment Grounding System ) ( per NEC or local codes ) 4 . Lightning Protection for individual poles as follows ( per NFPA 780 ) : a . A 5/8 " x 8 ' copper grounding rod buried vertically in undisturbed earth . The bottom tip of the grounding rod should reach a minimum of 10 ' above grade . b . A copper grounding conductor shall be connected to the top of the copper grounding rod and extend and connect to the grounding lug located inside the handhole of the pole approximately 10 ' above grade . The size of this conductor shall be #2 if the pole is less than 75 ' in height and #2/0 if the pole is 75 ' in height or greater . 2 . Underground wiring shall be all copper wire and shall be installed in PVC Schedule 40 conduit and shall be buried to a depth meeting the NEC and local electrical codes . Acceptable copper wire types need to comply with any local requirements . If above ground conduit must be used , it shall be rigid . Conduit elbows located at the electrical panel should be rigid conduit. B . Trenching or Directional Boring 1 . The installing contractor shall be responsible for locating all public and privately owned underground utilities including , but not limited to , natural gas , electric , water , sewer, cable TV and telephone . Owner will provide drawings which show private utilities as best known . Contractor is responsible for confirming locations as needed to complete projects . 2 . Trenching depth and width shall be adequate to install appropriately sized conduit and to meet local and National Electrical Codes . 3 . Trenches shall be back-filled with excavated soil and compacted to approximately the same density of the surrounding soil to minimize settlement . Trenches will be sodded . 43 FAPublic Works\ENGINEERING DIVISION PROJECTS\ 1042 VB Sports Village Lighting\Admim\bid documents\Bid Docs VBSV Lighting revised 12- 13 - IO . doc