'service-entrance cables, where subject to physical damage, shall be protected by any of the following except: Rigid metal conduit (RMC) .
Rigid Metal Conduit (RMC) is a thick-walled, threaded pipe typically made of coated steel, stainless steel, or aluminum. Galvanized rigid tube (GRC) is a galvanized steel tube with a tube wall thick enough to allow a screw to pass through.
Rigid Metal Conduit (RMC) is heavy-walled and constructed of aluminum or galvanized steel. This grade is one of the most durable tube types used in many industrial applications. Hard metal is one of the more expensive options, but offers additional strength.
RMC stands for Rigid Metal Conduit. This is one of the most durable types of wire and uses galvanized steel in its construction.
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