Red Line
January 20, 2017
UL 797A
UL Red Line
Edition 3
Published Date: January 20, 2017
Last Revision: November 17, 2021
Scope
00797a-000000-0000001 Scope
1.1 These requirements cover aluminum and stainless steel electrical metallic tubing (EMT) and elbows in trade sizes 3/8 – 4 (12 – 103)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 tubing.
1.2 Tubing 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 Metallic Tubing – Steel, UL 797.
Summary of Topics s0797a_3_sum.htmlSummary of Topics
This revision was issued to incorporate the following changes:
1. Removal of the term "mandrel"
Back to Standard 797A, Edition 3