1.1 These requirements cover aluminum and stainless steel electrical rigid metal conduit (RMC), nipples, elbows, and couplings in trade sizes 3/8 - 6 (12 - 155), for use as a metal raceway for the installation of wires and cables in accordance with the
National Electrical Code. The values in parentheses are metric designators of conduit.
1.1.1 These requirements also cover red brass electrical rigid metal conduit (RMC), nipples, elbows, and couplings in the 1/2 (16) trade size for use as a metal raceway for the installation of wires and cables in direct burial and swimming pool applications in accordance with the National Electrical Code.
1.2 Steel conduit provided with an exterior coating of zinc or a zinc-based, nonmetallic, or other alternate corrosion-resistant material and an interior coating of an organic or zinc material, is covered by the Standard for Electrical Rigid Metal Conduit - Steel, UL 6.
1.3 Deleted August 12, 2003