NEMA - National Electrical Manufacturers Association
适用范围
This standard covers the requirements for porthole-extruded aluminum-alloy conduit for use as a raceway for the wires or cables of an electrical system. The finished conduit is produced in nominal 10 ft. (3.05 m) lengths@ threaded on each end with one coupling attached.This standard also covers aluminum conduit couplings@ elbows@ nipples and conduit lengths other than 10 ft (3.05 m).Properly assembled systems of conduit@ couplings@ elbows and nipples manufactured in accordance with this standard@ and other identified fittings@ provide for the electrical continuity required of an equipment grounding conductor.?