The words in 300.10 Make it very hard to install RMC or IMC using only one locknut (assume it's not a bonding locknut) and maintain continuity of the grounding conductor if the raceway is the grounding conductor. I would not approve an installation of RMC or IMC using a single standard locknut on the inside of an enclosure and nothing on the outside.
300.10 NEC 2008 Edition
Last edited by George Little; 02/18/12 10:13 PM. Reason: Typo
