This article was posted 12/14/2007 and is most likely outdated.

Article 760 Fire Alarm Systems - 760.21
 

 
Subject - Article 760 Fire Alarm Systems - 760.21
Based on - NEC - 2005 Edition

December 14, 2007
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Fire Alarm Systems

760.21 GFCI and AFCI Protection

Part II. Nonpower-Limited Fire Alarm (NPLFA) Circuits

New rule prohibits AFCI protection of the 120V circuit that supplies power for a nonpower-limited fire alarm system.

The power source for a nonpower-limited fire alarm circuit cannot be supplied through ground-fault circuit interrupters or arc-fault circuit interrupters. Figure 760-2

Author’s Comment: This GFCI/AFCI limitation only applies to the circuit that supplies a nonpower-limited fire alarm system. Smoke detectors connected to a 15 or 20A, 120V circuit must be AFCI-protected if located in the bedroom of a dwelling unit [210.12(B)]; because according to NFPA 72, National Fire Alarm Code the circuit for the smoke detectors isn’t the power source of a nonpower-limited fire alarm circuit.



Figure 760-2
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Comments

  • The NEC is beginning to institute changes/modifications that are not wise or safety related. GFCI/AFCI should not be incorporated into any circuit other than receptacles in the bathroom, crawl space, garage next to opening, or bedroom receptacles. What is happening to common sense in the electrical field. Too many people are seeking input and a name for making a worthless change. To even think of putting any circuit related to fire protection or the like on either GFCI or AFCI is a no brainer.

    Robert Lee
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