Underwriters' Laboratories of Canada

AUDIBLE SIGNAL DEVICES FOR FIRE ALARM SYSTEMS, INCLUDING ACCESSORIES - Third Edition
 N CAN/ULC-S525-07

Annotation

These requirements cover electrically operated bells, sirens, horns, and similar audible signal devices, rated at 300 V or less, for fire-protective signalling service and intended for indoor and/or outdoor installation in accordance with CSA C22.1, Canadian Electrical Code, Part I, Safety Standard for Electrical Installations; and with CAN/ULC-S524, Installation of Fire Alarm Systems. Refer to CAN/ULC-S541, Speakers for Fire Alarm Systems, Including Accessories, for requirements pertaining to speakers.

These requirements cover audible signal devices for use in ordinary (nonhazardous or non-corrosive) locations.

Audible signal devices for use in hazardous or corrosive locations shall comply with the requirements of this Standard and the applicable requirements of CSA C22.1, Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, with respect to the location hazard.

An audible signal device as defined by this Standard is a unit assembly suitable for separate installation as a component of a fire alarm system.

This standard also covers protective covers and accessories used with audible signals for fire alarm systems.

A supplementary visual signal, incorporated as part of an audible signal device which is intended for fire alarm application, is covered by the applicable requirements in CAN/ULC-S526, Visible Signal Devices for Fire Alarm Systems, Including Accessories, in addition to the requirements of this Standard.