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11 <br />ELECTRICAL WORK <br />Section 16050- Page 3 <br />Joints and fittings may be taped in lieu of factory coated fittings. <br />Use PVC pressure sensitive tape, min thickness of 0.020", Johns - <br />Manville #VID-20, 3M Co. #51, or equal. Apply 3 layers of tape with <br />1/2" min lap, and extending 6" min over adjacent covering. <br />2.05 OUTLET BOXES <br />A. Cast Boxes: Appleton, Crouse -Hinds, or equal, cast metal type with threaded <br />hubs. <br />a <br />Use cast metal boxes in moist locations where surface mounted rigid conduit <br />system is used (e.g. on boiler structures, in refrigerator rooms, service <br />tunnels and manholes, on building exterior surfaces), and for surface <br />mounted weatherproof outlets or devices, regardless of location. <br />2.06 PLYWOOD BACKING BOARDS <br />A. Where Required: Provide plywood backing boards at following locations: <br />1. In all Electric Closets, including electric power closets, telephone <br />closets, signal systems closets, etc. <br />2. At all other locations as shown, and/or as required for mounting elec- <br />trical equipment. <br />B. Size: In each Electric Closet, cover with backing boards entire surface <br />of back wall and 2 side walls, from floor to 8' above floor, unless other- <br />wise shown. Make backing boards at other locations as shown or as required <br />by equipment. <br />C. Materials: 3/4" thick plywood, medium density overlaid both sides, secured, <br />to wall with sufficient fasteners to support load of 16 lbs/sq ft, but not <br />less than 200 lbs for any board. Use galvanized or cadmium plated bolts, <br />screws, washers, nails, etc, for attaching backing boards. <br />PART 3 - EXECUTION <br />3.01 WIRING METHODS <br />A. General Requirements. <br />-i 1. Do not use blocks, tackle, or other mechanical means to pull in wires <br />#8 AWG, or smaller. <br />2. Unless otherwise specified or shown, leave at least 9" of free conductors <br />at each unconnected outlet. Tape free ends of conductors and coil <br />neatly in outlet box. <br />B. Splicing and Termination of Conductors. <br />1. Conductors 7t10 AWG and Smaller. <br />a. Twist conductors together to be electrically and mechanically secure, <br />and solder them; or join conductors together by means of preinsulated <br />spring pressure connectors, or uninsulated splice caps applied with <br />proper indenter tool designed for the specific type of cap used. <br />Twist conductors together before applying splice caps. <br />b. Insulate splices, joints and free ends of conductors with insulation <br />equivalent to that of conductors by taping with rubber and friction <br />tapes, or with high dielectric strength plastic tape. <br />021387:cw MAR 702 <br />