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CONDUIT, FITTINGS & SUPPORTS Section 16021 15-1207 C. EMT Fittings: Two-inch (2") trade size and smaller, raintight, steel compression type requiring tightening of a nut. Set screw type, two and one half (2 1/2") trade size and larger. Box connector with insulated throat. Do not use insulated throat for #4 AWG conductors or larger, use separate insulated bushings. d. RSC and IMC Couplings and Unions Four inch (4") Diameter and Smaller. Threaded type. e. Chase Nipple with Insulators, Steel Locknuts, and Insulated Bushings: Thomas & Betts Company or equal. f. Reducing Bushings, Condulet Gaskets, and Condulet Covers: Crose-Hinds types or equal g. Threadless Metallic Insulating Bushings for EMT, EMT Straps, Rigid Steel Conduit Straps and Rigid Steel Conduit Couplings: EFCOR or equal. 9. Electrical Support Types: a. Electrical Supports: One and five-eighths inches (1 5/8") by one and five-eighths inches (1 5/8") hot dipped galvanized ASTM A-123 and A-153 (outdoor use), electrogalvanized ASTM B-633-85 (indoor use) channel formed from U.S.S.G. No. 12 or 0.109 inch material; cold formed from prime pickled and oiled mild strip steel. Length of Each Section: Ten feet (10'). b. All Electrical Supports, Fittings, and Accessories: Of same manufacturer and shall fit together as system without modification. C. Threaded Rods, Couplings, Screws, and Nuts: Electrogalvanized in compliance with ASTM B-633-85. d. Finish On All Other Items: For outdoor use, hot -dipped galvanized after fabrication; after cutting, de -burring, and hole drilling; zinc weight two ounces (2 oz) per square foot of surface; ASTM A123 and A153. For indoor use, electrogalvanized ASTM 6- 633-85 after fabrication, cutting, de -burring, and hole drilling. B. Outlet and Junction Boxes: 1. Outlet Boxes and Fittings: UL 514. 2. Outlet Boxes: Galvanized sheet steel for indoor locations and of proper Code size for required number of conductors; four inch (4") square unless specifically shown on Drawings; complete with approved type of connectors and required accessories. Boxes for one -inch (1") conduit or larger, four and eleven -sixteenths inches (4 11/16") minimum trade size. 3. Outlet boxes shall be complete with raised device covers as required to accept device installed. Securely fasten all outlet boxes in position with exposed edge of raised device cover set flush with finished surface. Install approved factory made knockout seals where knockouts are not intact. 4. Surface Mounted Outlet Boxes Located Indoor Below Eight Feet (8') Above Floor Line: Threaded Cast Boxes. 5. Outlet Boxes Located on Exterior in Damp or Wet Locations or As Otherwise Shown or Specified: NEMA 4 threaded cast boxes. 6. Equip receptacle outlet boxes with grounding lead. Connect to grounding terminal of device. 7. Pullboxes: Galvanized sheet steel, Code gauge, except 12 gauge shall be minimum. 8. Paint for Touch-up for Wrench Marks: Glyptal, PVC paste or equal. 9. Ceramic Fiber: Babcock & Wilcox "Kaowool", Carborundum "Fiberflex", John Mansville "Ceraflex" or equal.