AUDIBLE SIGNAL DEVICES FOR FIRE ALARM SYSTEMS, INCLUDING ACCESSORIES
1.1 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.
1.2 These requirements cover audible signal devices for use in ordinary (nonhazardous
or non-corrosive) locations.
1.3 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
1.4 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.
1.5 This standard also covers protective covers and accessories used with audible
signals for fire alarm systems.
1.6 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.