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31604.DSK �. <br /> WP-SFO <br /> B. High-Pressure Sodium: Provide high-pressure sodium ballast with high <br /> power factor for operation at voltage provided. <br /> C. Manufacturer: <br /> I . <br /> 1. High-Pressure Sodium: General Electric, Sylvania, Advance, or <br /> equal. <br /> 2.12 LIGHTING CONTROL <br /> A. Photocells: <br /> 1. Provide automatic ON/OFF switching photo control device, <br /> completely self-contained in die-cast aluminum housing, not affected <br /> by moisture, vibration, or temperature changes; ON at dusk and OFF <br /> at dawn; time delay feature to prevent false switching; and field <br /> adjustable to control operating levels. <br /> 2. Manufacturers: <br /> a. Tork <br /> b. Paragon <br /> C. Or equal. <br /> 2.13 RECEPTACLES <br /> A. Provide UL listed, specification grade receptacles meeting NEMA WD 1 <br /> performance standards and Federal Specification W-C-596 and having a <br /> contact arrangement such that contact is made on two sides of each inserted <br /> blade without detent. Use two-pole, three-wire grounding type receptacles <br /> rated 20 amps, 125 volts, NEMA Configuration 5-20R and with screw type <br /> wire terminals suitable for No. 10 AWG. <br /> 2.14 JUNCTION AND PULL BOXES <br /> A. For hazardous areas, use boxes applicable for the location and hazardous <br /> atmosphere present. <br /> 2.15 GROUNDING <br /> A. . Ground Rods: Provide copper-clad steel ground rods not less than 314-inch <br /> diameter, 10 feet long driven full length into the earth where shown and of <br /> sufficient number to obtain 1 ohm earth resistance as measured by the <br /> three-point method. <br /> B. Ground Conductors: Provide Type THW or THHN/THWN stranded <br /> grounding conductors of the size required by the NEC or shown on the <br /> Drawings whichever is larger. Provide a ground conductor in every <br /> conduit except for conduits carrying circuits 50 volts or less. <br /> C. Ground Connections: <br /> 1. For belowgrade or in-slab connections, provide exothermic-welded <br /> type of connectors as manufactured by Cadweld, Thermoweld, or <br /> equal. <br /> BAE31604.AS.T1 <br /> 16005 5 ELECTRICAL SYSTEM <br />