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NEMA BI 50006-2024
Polyvinyl Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit
Covers continuous PVC exterior coatings and corrosion-resistant interior coatings, as well as galvanized steel conduit, galvanized steel IMC, threaded couplings and elbows to which they may be applied.
NEMA: National Electrical Manufacturers Association [nema]