Historical
NEMA RN 1-2005 (R2013)
Polyvinyl-Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit
These standards cover continuous polyvinyl chloride exterior coatings, corrosion resistant interior coatings, and the galvanized steel conduit, galvanized steel intermediate metal conduit, threaded couplings, and elbows to which they may be applied.
NEMA: National Electrical Manufacturers Association [nema]
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