1 Scope

1.1 These requirements cover electrical rigid metal conduit – steel (ERMC-S), elbows, couplings, and nipples for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code, Part I, NOM-001-SEDE, Standard for Electrical Installations, and NFPA 70, National Electrical Code (see Reference Item No. 1, Annex A). ERMC-S is provided with a zinc, zinc-based, nonmetallic, or other alternate corrosion-resistant exterior coating and an organic or zinc interior coating. It is the user's responsibility to determine the appropriate product for their application.

1.2 Non-ferrous and stainless steel conduits are covered by the standards listed in Reference Item No. 2, Annex A.

Summary of Topics

This new edition of ANSI/UL 6 dated November 28, 2022 includes the following:

– Updated references in Annex A

– Correction of typo in the measurement for length in millimeters; 5.5.2

– Introduction of a range for specific gravity of copper sulfate solution; 6.2.2.1