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ANSI C80.3-2020
Electrical Metallic Tubing - Steel (EMT-S)
This Standard covers the requirements for steel electrical metallic tubing, for use as a raceway for wires or cables of an electrical system. Finished tubing is typically furnished in nominal 10-ft (3.05-m) lengths. It is protected on the exterior surface with a metallic zinc coating or alternate corrosion protection coating (see UL 797 for alternate corrosion protection coating requirements) and on the interior surface with a zinc or organic coating.
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NEMA: National Electrical Manufacturers Association [nema]
NEMA: National Electrical Manufacturers Association [nema]