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, 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. Aluminum electrical metallic tubing is covered by the standards listed in Reference Item No. 2, Annex a.
UL 797-2007 history
2023UL 797 BULLETIN-2023 UL Standard for Safety Electrical Metallic Tubing - Steel