Is it permissible for the fire alarm system to share a circuit with the extra lights?

Is it permissible for the fire alarm system to share a circuit with the extra lights?

• A. False
• B. True
• C. Only with approval
• D. Only during maintenance

Answer: (A)

Fire alarm circuits must be kept on dedicated, independently supervised power. This ensures the system has an uninterrupted supply and that fault conditions or power draws from other loads won’t affect signaling devices or the control panel. If lighting or other equipment shares the same circuit, a surge, outage, or overload could reduce voltage, trip breakers, or mask a fault, potentially delaying or silencing alarms when they’re most needed. By keeping the fire alarm on its own circuit (with its own power source and battery back-up), the system remains reliable and detectable at all times, including during emergencies. In normal practice, sharing circuits with extra lights is not permitted unless a very specific, approved design exception is in place, which is not the standard approach.

Fire alarm circuits must be kept on dedicated, independently supervised power. This ensures the system has an uninterrupted supply and that fault conditions or power draws from other loads won’t affect signaling devices or the control panel. If lighting or other equipment shares the same circuit, a surge, outage, or overload could reduce voltage, trip breakers, or mask a fault, potentially delaying or silencing alarms when they’re most needed. By keeping the fire alarm on its own circuit (with its own power source and battery back-up), the system remains reliable and detectable at all times, including during emergencies. In normal practice, sharing circuits with extra lights is not permitted unless a very specific, approved design exception is in place, which is not the standard approach.