Per NEC®, the circuit disconnect means for a fire alarm system shall have red identification and be identified as ___.

• A. Fire Alarm Circuit
• B. Do Not Disconnect
• C. Fire Alarm System Power
• D. Fire Alarm Disconnect

Answer: (A)

The circuit disconnect for a fire alarm system must be clearly identified to show its purpose as a life-safety circuit. NEC requires red identification and a label that communicates exactly what the disconnect controls. Labeling it as “Fire Alarm Circuit” makes the function unmistakable to anyone working on or near the panel, helping prevent accidental disconnection during normal work or emergencies. The red color signals urgency and safety-critical status.

Other labels don’t fit as precisely: “Do Not Disconnect” is not specific to a fire alarm circuit; “Fire Alarm System Power” could imply overall power rather than the specific circuit disconnect; “Fire Alarm Disconnect” points to the device rather than the circuit it serves. So the exact, NEC-approved label is “Fire Alarm Circuit.”