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Q. What are the NEC requirements if RMC is installed in contact with dissimilar metals?
See answer below.
A. The requirements for RMC installed in contact with dissimilar metals are found in Sec. 344.14.
If practical, contact of RMC with dissimilar metals should be avoided to prevent the deterioration of the metal because of galvanic action. Aluminum and stainless steel fittings and enclosures are permitted to be used with galvanized steel rigid metal conduit where not subject to severe corrosive influences.
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