scope:

This Standard covers the requirements for extruded aluminum-alloy conduit for use as a raceway for the wires or cables of an electrical system. The 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.

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

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.