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31604.DSK <br /> WP-SFO <br /> C. Provide all necessary sleeves and chases required. In outdoor, <br /> underground, or wet locations, use watertight couplings and connections in <br /> raceways. Install and equip boxes and fittings so as to prevent water from <br /> (( entering the raceway. <br /> f� <br /> D. Paint all threads of galvanized conduits with zinc-rich paint or liquid <br /> galvanizing compound before assembling. Touch up after assembly to <br /> cover nicks and scars. <br /> E. Conduits entering cabinets, pull boxes or outlet boxes shall be secured with <br /> f double galvanized locknuts, one on inside and outside of box, and bushings, <br /> or provided with hubs as shown. <br /> F. Conduit shall be sized in accordance with the NEC and shall be of such size <br /> and so installed that conductors may be drawn in without injury or <br /> excessive strain. <br /> G. Changes in direction of runs shall be made with symmetrical bends or cast <br /> metal fittings. Field made bends and offsets shall be made with an <br /> approved hickey or conduit bending machine. Crushed or deformed <br /> raceways shall not be installed. Trapped raceways in damp and wet <br /> locations shall be avoided where possible. Care shall be taken to prevent <br /> the lodgment of dirt, or trash in raceways, boxes, fittings, and equipment <br /> during the course of construction. Clogged raceways shall be entirely freed <br /> of obstructions or shall be replaced. <br /> H. Support raceways at intervals not exceeding NEC requirements. Raceways <br /> shall be securely and rigidly fastened in place at intervals of not more than <br /> 10 feet with approved pipe straps, brackets, conduit clamps, conduit <br /> hangers, threaded C-clamps with retainers, or ceiling trapeze. Support <br /> individual raceways by brackets, on hangers, fastened by toggle bolts on <br /> hollow masonry units, expansion shields on concrete or brick, and machine <br /> screws or welded thread studs on steel work. <br /> i <br /> 3.7 GROUNDING <br /> A. Ground all exposed noncurrent-carrying metallic parts of electric <br /> equipment, raceway systems, metallic tanks and tank support systems, <br /> control panels, and the neutral of all wiring systems in strict accordance <br /> with the NEC, state, and other applicable laws and regulations. All <br /> electrically operated equipment shall be bonded to the grounding and <br /> conduit system. <br /> B. Connect junction boxes to the equipment grounding system with grounding <br /> clips mounted directly on the box or with 318-inch machine screws. <br /> Completely remove all paint, dirt, or other surface coverings at grounding <br /> conductor connection points so that good metal-to-metal contact is made, <br /> then refinish for corrosion protection. <br /> C. Install sufficient ground rods (in addition to all grounding methods required <br /> by code or shown on the Drawings) so that resistance to ground as tested <br /> by standard methods does not exceed 1 ohm unless otherwise approved in <br /> writing by the Engineer. Where additional.ground rods are required, install <br /> rods at least 10 feet apart. <br /> BAE31604.AS.Tl <br /> 16005 8 ELECTRICAL SYSTEM <br />