What is a combination arc fault circuit interrupter (CAFCI)?
Thursday, January 30, 2020
A combination AFCI is an improved version of the original AFCI, and replaced it as a requirement in the 2008 edition of the National Electrical Code (NEC). The original AFCI only provided protection against parallel arcing (between hot and neutral, or hot and ground), but the new version also trips for series arcing (between a small gap or frayed area in the same wire).
To learn more, see our blog posts What is the difference between a Combination Arc Fault Circuit Interrupter (CAFCI) and an Arc Fault Circuit Interrupter (AFCI) circuit breaker? and How do I identify a combination AFCI (CAFCI) circuit breaker? and Where is AFCI required for outlets in a house?
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