ULC CAN/ULC-S541:2016-REV1 FOURTH EDITION Standard for Speakers for Fire Alarm and Signaling Systems, Including Accessories

This Standard covers speakers, rated at 300 V or less, for fire alarm and signaling systems

intended for indoor and/or outdoor installation.

The following changes have been incorporated into this edition of the Standard:

a) Addition of new Clause 1.7.1 regarding installations requiring low frequency

notifications; 

b) Revisions to Clause 7.11, Abnormal Operation and Burnout Test, to resolve the

binational differences between Canada and the United States and to insert any missing

requirements that were accidentally omitted during the creation of the original binational

document;

c) Revisions to clarify the temperature conditioning requirements for indoor and outdoor

use appliances in clause 7.21.4 (mechanical strength tests for enclosures);

d) Additional reference document changes and corrections to existing requirements in

CAN/ULC-S541.