Most recent

UL 1638 Ed. 6-2023 (2026)

Visible Signaling Devices for Fire Alarm and Signaling Systems, Including Accessories - Published Date: May 14, 2026

This revision of ANSI/UL 1638 dated May 14, 2026 includes changes in requirements for Black Box Test Procedure Clarification, 20.3.6.

CONTENT PROVIDER
Underwriters Laboratories [ul]

Included in Packages
This standard is not included in any packages.
Document History
Amendments & Corrections
We have no amendments or corrections for this standard.