Which standard applies to commercial fire alarm system controls?

• A. UL 864
• B. UL 508
• C. UL 1995
• D. UL 94

Answer: (A)

Understanding which standard governs commercial fire alarm system controls centers on recognizing that fire alarm control panels and their accessories are evaluated under a standard dedicated to fire alarm equipment. UL 864 sets the requirements for control units and accessories for fire alarm systems, covering how the system performs, interfaces, power supplies, and signaling to ensure reliability and safety in a fire situation. This makes it the appropriate standard for commercial fire alarm controls. The other standards address different areas: UL 508 applies to general industrial control panels and electrical control equipment not specific to fire alarms; UL 1995 relates to heating, ventilation, and air-conditioning equipment; UL 94 is a flammability rating for plastics and isn’t about fire alarm control systems. So UL 864 is the standard that applies to commercial fire alarm system controls.