CAN/ULC S541:2023

Scope 1.1 These requirements apply to speakers, rated at 300 V or less, for fire alarm and signaling systems intended for indoor and/or outdoor installation: a) In Canada only: in accordance with CSA C22.1, Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, and with ULC-S524, Standard for Installation of Fire Alarm Systems. b) In the United States only: in accordance with the National Electrical Code, NFPA 70, and the National Fire Alarm and Signaling Code, NFPA 72. 1.2 These requirements apply to speakers for use in ordinary (non-hazardous or non-corrosive) locations. 1.3 This Standard also covers protective covers and other accessories used with speakers. 1.4 Speakers for use in hazardous or corrosive locations shall comply with the requirements of this Standard and the applicable requirements: a) In Canada only: CSA C22.1, Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, with respect to the hazard or category classification. b) In the United States only: the National Electrical Code, NFPA 70. 1.5 Each product or device referred to as a speaker in this Standard is a speaker assembly suitable for separate installation as a component of a fire alarm system. 1.6 A supplementary visual signal, incorporated as part of a speaker which is intended for fire alarm application shall comply with the requirements of this Standard and the applicable requirements of the Standard for Visible Signaling Devices for Fire Alarm and Signaling Systems, Including Accessories, ULC 526 and UL 1638. 1.7 Speakers intended for use with fire alarm systems and having integral amplifiers shall comply with the requirements in this standard in addition to the applicable requirements in: a) In Canada only: ULC 527, Standard for Control Units for Fire Alarm Systems. b) In the United States only: UL 864, Control Units and Accessories for Fire Alarm Systems. 1.8 Speakers intended for installations requiring a low frequency (520 Hz) notification to awaken sleeping persons shall also be evaluated to: a) In Canada only: ULC 527, Control Units for Fire Alarm Systems. b) In the United States only: UL 864, Standard for Control Units and Accessories for Fire Alarm Systems. 1.9 Speakers intended for use in air-handling spaces (plenums) shall comply with the requirements in this standard and the requirements in: a) In Canada only: ULC-S142, Standard Method of Fire Test for Heat and Visible Smoke Release for Discrete Products. b) In the United States only: UL 2043, Standard for Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces. 1.10 These requirements do not cover the following: a) Speakers intended for personal or private consumer use; b) Speakers which are intended for commercial or professional audio applications; and c) Speakers intended for security applications.