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UL 797A Ed. 4-2026 (2026)

Electrical Metallic Tubing - Aluminum and Stainless Steel - Published Date: March 19, 2026

1.1 These requirements cover aluminum and stainless steel electrical metallic tubing (EMT) and elbows in trade sizes 3/8 – 6 (12 – 155) for use as a metal raceway for the installation of wires and cables in accordance with the NFPA 70®, National Electrical Code® (NEC®).  NFPA 70®, National Electrical Code®, and NEC® are registered trademarks of the National Fire Protection Association, Quincy, MA.  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.

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Underwriters Laboratories [ul]

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