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Standard 1638, Edition 5

Visible Signaling Devices for Fire Alarm and Signaling Systems, Including Accessories

UL CSDS Proposal
Standard 1638, Edition 5 Edition Date: November 18, 2016
Summary of Topics b1638_5_20161118_sum.html

Subject 1638

Bulletin Dated: November 18, 2016

SUMMARY OF TOPICS

The following changes in requirements to the Standard for Visible Signaling Devices for Fire Alarm and Signaling Systems, Including Accessories, UL 1638, are being proposed:

1. Clarifications to Add Visual Signal Pulse Width Marking and Revise Abnormal Operation and Burnout Test and Mechanical Strength Tests for Enclosures

2. Reference Document Changes and Corrections to UL 1638/UL S526

Back to Standard 1638, Edition 5

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