ULC 304

This Standard covers construction and performance requirements for control units and accessories for intrusion alarm systems, including:
a) Protected premises control units and accessories for local or signal receiving centre connections; and
b) Signal receiving centre alarm receiving equipment including recording equipment.
c) Power supplies for use as integral or stand-alone components in intrusion alarm systems.
The equipment covered by this Standard is intended for use in premises, safes and vaults.
These requirements also serve as the basis of classification of signal receiving centre intrusion alarm control units. Requirements covering complete control units are contained in ULC-S301, Standard for Signal Receiving Centres Configurations and Operations.
Rules covering installation and classification (of extent) of alarm protective equipment at individual locations are contained in ULC-S302, Standard for the Installation, Inspection and Testing of Intrusion Alarm Systems.
These requirements do not cover intrinsically safe systems for use in hazardous locations, as defined in CSA C22.1, Canadian Electrical Code.