Arc Fault Circuit Interrupters

Problems in home electrical systems, like arcing and sparking, have been associated with more than 40,000 fires every year. hat translates to over 350 lives lost and 1,400 personal injuries annually. This new electrical safety device called an Arc Fault Circuit Interrupter (AFCI), was recently developed and is expected to provide significant protection from fires resulting from these unsafe wiring conditions.

Ordinary household fuses and breakers do not respond to early arcing and sparking conditions. By the time a fuse or circuit breaker stops the flow of electricity in a circuit, the fire may already have begun. Several years ago, a Consumer Products Safety Commission (CPSC) study identified arc fault detection as a promising new technology. Since then, the CPSC engineers have tested the new AFCI’s on the market and found them to be very effective.

A few important facts to note:

The most recent edition of the National Electrical Code (NEC – January 2002), the widely adopted model code for electrical wiring, requires AFCI’s for all bedroom circuits in new residential construction. Future editions of the code, which is updated every three years, could expand the required areas. Don’t confuse AFCI protection and GFCI protection. Both AFCI’s and GFCI’s are important safety devices, but they have different functions. AFCI’s are intended to prevent fire hazards; GFCI’s prevent shock hazards. Combination devices that include both AFCI and GFCI protection in one unit will become available soon. Current configurations, as depicted above, have a reset button on the breaker in the electrical panel. Future designs might change the location of the reset. It is wise to install AFCI protection in older homes. Aging wiring systems are often at the most risk for arcing and sparking. sure to have a qualified electrician install AFCI’s; do not attempt this work yourself. Expect to see home inspectors recommend AFCI’s for all dwellings. Many people would be alive today if only they had an AFCI installed prior to the fire that claimed their lives. Home inspectors are likely to be the ones bringing this news to the public.