scope:

This Standard covers the requirements for an electrical rigid steel conduit for use as a raceway for wires or cables of an electrical system. Finished conduit is produced in standard 10 ft. (3.05 m) lengths, threaded on each end with one coupling attached. The production of lengths shorter or longer than the Standard length shall be allowed, whether threaded or unthreaded and with or without couplings. ERMC-S is protected on the exterior surface with a metallic zinc coating or alternate corrosion protection coating (as specified in clauses 5.3.3, 6.2.4, 7.8, and 7.9 in UL 6) and on the interior surface with zinc or organic coating.

This Standard also covers conduit couplings, elbows, and nipples.

Properly assembled systems of conduit, couplings, elbows, and nipples manufactured in accordance with this Standard and other identified fitting provide for the electrical continuity required of an equipment grounding conductor.