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3. Conduits shall not obstruct head room, walkways or doorways.4. Conduits shall be secured to cabinets, junction boxes, pull boxes and outletboxes by bonding type locknuts. Rigid and IMC conduit installations shall have alocknut on outside of enclosure and locknut and bushing on inside of enclosure.EMT installations may have a single locknut on inside of enclosure, wrench tight.Conduit connections shall not be made to junction box covers.5. Provide a pull wire in empty conduits, consisting of one No. 12 steel or copperwire or heavy duty nylon cord for small conduits and nylon rope for largeconduits.6. Arrange conduit supports to prevent distortion of alignment by wire pullingoperations. Conduit shall be fastened using straps or clamps, lay-in adjustablehangers, clevis hangers or bolted split galvanized hangers secured to structurewith machine screws, expansion sleeves or lead anchors. Spring steel typesupports or fasteners shall be permitted for concealed 1/2-inch EMT only. Chain,wire or perforated straps shall not be used to support or fasten conduit.7. Conduit support spacing shall be provided as required by the NEC, but in nocase shall the maximum spacing of supports exceed six feet for conduits smallerthan 1-inch trade size and 10 feet for conduits 1-inch trade size and larger.8. Group conduits in parallel runs where practical using conduit racks constructed ofsteel channel with conduit straps/damps or trapeze hangers with U-bolts or otherapproved fasteners.9. Fasteners shall be sized and designed for intended use. Fasteners, in solidmasonry or concrete, shall be steel or malleable iron concrete inserts, 1/4-inchminimum diameter steel expansion anchors embedded not less than 1 1/8-inchesor 1/4-inch minimum diameter power set fasteners with depth of penetration atleast three inches. Hollow masonry anchors shall be toggle bolts, hollow wallfasteners, or concrete block anchors. Sheetmetal screws shall be used on metalstuds and wood screws used on wood construction. Attachment by wood plugsor wood blocking is not permitted.3.2 CONDUIT INSTALLATIONA. General Requirements: All raceways shall be installed in accordance with the NECAStandard of Installation:1. Cut conduit square using a saw or pipe cutter; de-burr cut ends.2. Bring conduit to shoulder of fittings and couplings and fasten securely.3. Use conduit hubs or sealing locknuts for fastening conduit to cast boxes and forfastening conduit to sheetmetal boxes in damp or wet locations.4. Install no more than equivalent of four 90-degree bends between boxes forpower circuits and two 90-degree bends for low voltage and communicationscircuits.5. Avoid moisture traps where possible. Where unavoidable, provide junction boxwith drain fitting at conduit low point. Outdoor conduits shall be graded aminimum of six inches per one-hundred feet with no traps.6. Coordinate all conduits with other trades. Consult with Mechanical Contractorbefore installing conduits for electrical feeders so that conflicts between locationsof conduit runs, piping, and ductwork will be adjusted prior to installation. Ingeneral, large pipe mains and air ducts shall be given priority in available space.Conduit runs shall be installed so as to maintain, wherever practical, a minimumseparation of three inches from water and waste piping and six inches fromsteam piping.7. Provide sealing fittings, to prevent passage of water vapor, where conduits passfrom warm to cold locations.8. Drilling, cutting, and patching required for conduit installation shall be asdescribed in Section 16012.CONDUITS AND FITTINGS16111-4