Arc Fault Circuit Interrupters Frequently Asked Questions

Additionally, the 2008 NEC has specified the use of Combination Type AFCIs whereas ... volts, the electronics within the AFCI / GFCI will not be powered such that they can offer the correct arc fault or ground fault protection. In either case, the thermal magnetic protection (overcurrent / short circuit protection) will continue to be in place. ...

  Combination, They, Acif