UL 797 PDF

 

1 Scope

1.1 These requirements cover electrical metallic tubing – steel (EMT) and elbows 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). EMT 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 users’ responsibility to determine the appropriate product for their application.

1.2 Aluminum electrical metallic tubing is covered by the standards listed in Reference Item No. 2, Annex A.

 

Summary of Topics

This revision of ANSI/UL 797 dated April 28, 2023 includes the following changes in requirements:

– Introduction of a Range for the Specific Gravity; 6.2.2.1

– Electrical Metallic Tubing, Addition of trade sizes 5” & 6” in Steel; 5.1.2, Table 5.1, 6.2.2.5, Table 5.2, B.1 and Table F1

– Removal of “for reference only (not a requirement)” from Table 5.2