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 1, 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.

Summary of Topics

This revision of ANSI/UL 6 dated September 27, 2019 includes the following :

Annex A Normative References Update

Interpretation of Flammability Test Result for a Thin Nonmetallic Topcoat (Outermost Layer) of an Alternate Corrosion Protection System

Removal of Chamfer Angle Requirement for Couplings

Clarification to Elbow Requirements, Test Bend Radius, and Editorial Changes