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Arc Fault Circuit Interrupters (AFCIs)

AFCI's involve a technology that detects arcing-faults in electrical circuits that could cause fires. By recognizing characteristics unique to arcing and functioning to de-energize the circuit when an arc-fault is detected, AFCI's further reduce the risk of fire beyond the scope of conventional fuses and circuit breakers.

Effective January 1, 2002, NFPA 70, The National Electrical Code (NEC), Section 210-12, requires that all branch circuits supplying 125V, single phase, 15- and 20-ampere outlets installed in dwelling unit bedrooms be protected by an arc-fault Circuit interrupter.

This page was developed to assist AHJ's by providing them with a reference source of UL information on AFCI's.

The following articles, written by UL Staff, provide background information on the development of UL 1699, the Standard for Arc-Fault Circuit Interrupters, and issues related to AFCIs.

CPSC Public Notices and News Releases

• Preventing Home Fires: Arc Fault Circuit Interrupters (AFCIs)

Outside Organization - Articles by UL Staff

• AFCI Indicators
• AFCIs show promise to save lives by preventing electrical fires (On The Mark Vol. 5, No. 3, 1999)
• Arc-Fault Circuit Interrupters (AFCIs) - Type and Performance Considerations (2001)
• Responses to specific concerns regarding AFCIs (reprint from Sept/Oct 2001 IAEI News)
• IAEI UL Question Corner Reprints relating to AFCIs
• Arc Fault Testing and Arc Fault Scenarios (January 28, 2002)

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