When installing listed threadless couplings and connectors on rigid metal conduit (RMC), where buried in concrete or masonry, the couplings and connectors shall be ______.
A. weather-proof.
B. weather-resistant.
C. judged suitable for the condition of use.
D. of the concrete tight type.
Find the Answer
Answer: D
Article 344 covers the use, installation, and construction specifications for rigid metal conduit (RMC) and associated fittings. As noted in Sec. 344.42(A), the couplings and connectors shall be of a concrete tight type.
Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].