Ground-Fault Circuit Interrupter 5 : A fast-acting circuit breaker, designed to limit electric shock, that is sensitive to very low levels of current leakage to ground
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}