Summary of Topics

This revision of CAN/ULC 304 dated August 28, 2026 includes the following changes in requirements:

– Category for Software-based Receivers; 4.56A, 4.56B, Section 67A

– Clarify where 72 hours backup is needed; 75.1, 75.4, Table 54.1

– Update 76.8 and 78.1 to align with Table 54.1;

– Glossary Update; 4.26, 4.31

– Audibility in undervoltage conditions; 59.2.1

– No compromise Test for A1; 69.6.2, Table 63.1

– Examples are not requirements; 70.1.3

– Update 9.3 Mechanical strength tests for enclosures; 9.3.1, 9.3.3, 9.3.4, 9.3.6

– Reference Update; 69.6.12

– Editorial Updates; Table 11.1, 66.3.3, 69.6.3, 69.6.13, 83.4

1 Scope

1.1 This Standard covers construction and performance requirements for control units and accessories for intrusion alarm systems, including:

1. a) Protected premises control units and accessories for local or signal receiving centre connections; and

2. b) Signal receiving centre alarm receiving equipment including recording equipment.

3. c) Power supplies for use as integral or stand-alone components in intrusion alarm systems.