Underwriters' Laboratories of Canada

Standard for Local Burglar Alarm Units and Systems - FIRST EDITION
 N CAN/ULC-S303-M91

Annotation

These requirements cover design and construction, performance, and maintenance of local burglar alarm units and systems for use in mercantile premises, mercantile safes and vaults, and bank safes and vaults.

A local alarm system as covered by these Requirements consists of protective circuits and devices, connected through control apparatus to an enclosed, tamper-protected sounding device mounted on an outside wall of the building in which the protected property is situated. Intrusion or disturbance of the protective units or wiring will cause the sounding device to be actuated. The sounding device will continue to operate until it is stopped by using the proper control key, or by exhaustion of the power supply, or by action of an automatic timing element which is preset for a definite operating period. These systems usually operate within the limits of Class 2 control and signal circuits as defined by the Canadian Electrical Code.

The operation of a local alarm system is partially under the control and domination of the owner or others interested in the property to be protected. However, it is required that local systems be maintained under the care and regular inspection service of the installing company. The installing company is expected to respond to troubles or calls for service promptly on report of the owner. It is the responsibility of the owner to switch the protection on and off duty and to report improper functioning of the system to the service company.

Local burglar alarm systems may be classified with or without a remote connection and may be further classified as to their suitability for use either on mercantile premises, on mercantile safes and vaults, or on bank safes and vaults.