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ANSI C80.1-2020
Electric Rigid Steel Conduit
Establishes the requirements for electrical rigid steel conduit for use as a raceway for wires or cables of an electrical system. Raceway systems (conduit, fittings, and enclosures) are relied upon to provide mechanical protection for circuit conductors and to carry potentially dangerous fault currents.
NEMA: National Electrical Manufacturers Association [nema]