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UL 1638-23 Visible signaling devices for fire alarm and signaling systems, including accessories

Publication Year

2023

Document Status

Current

Abstract

Specifies visual signaling devices intended for indoor and/or outdoor installation.

Document History

Supersedes UL 1638-16.

Publisher Information

Underwriters Laboratories

Established in 1894 as the Underwriters' Electrical Bureau, UL is a global safety consulting and certification company, approved to perform safety testing by the U.S. federal agency of Occupational Safety and Health Administration.

333 Pfingsten Road
Northbrook
UL
USA

Tel: +1 877 854-3577