Encyclopedia & FAQ's

DIY Frequently Asked Questions / Arc Fault Circuit Interrupter


  • DIY Frequently Asked Questions / Arc Fault Circuit Interrupter')"> An arc fault occurs when the insulation surrounding wire and cable is damaged or deteriorates. The arc fault can flare at temperatures in excess of 10,000ºF and ignite surrounding combustible material.
  • Standard circuit breakers do not respond quickly enough to arc faults. An arc fault circuit interrupter (AFCI) recognizes an arcing fault and acts instantly.
  • The National Electrical Code® (NEC) requires AFCIs be used in new construction on all bedroom circuits, family rooms, dining rooms, closets and hallways.