CAN/ULC-S531-M87

1. SCOPE 1.1 This Standard sets forth requirements for smoke-alarms, single- and multiple-station type, rated 120 V or less, intended for open area protection in ordinary indoor locations. 1.2 A smoke-alarm, as defined by these requirements, is a self-contained unit which consists of an assembly of electrical components including a smoke chamber, alarm-sounding appliance, and provision for connection to a power supply source, either by splice leads, terminals, a cord and plug arrangement, or containing integral batteries. 1.3 Smoke-alarms not intended for interconnection are defined as single-station type. 1.4 Smoke-alarms which may be interconnected so that actuation of one results in alarm sounding by all interconnected units are defined as multiple-station type. 1.5 The manufacture, importation, distribution, and disposal of smoke-alarms containing radioactive material are subject to the safety requirements of the Atomic Energy Control Board of Canada. 1.6 Verification of the acceptance of such smoke-alarms by the regulating agency involved is required prior to the investigation of the smoke-alarm to establish compliance with the requirements of this Standard.