Siemens QA120AFCH 20-Amp Single-Pole with QAFH2 Combination AFCI Breaker 120VThe Combination Type AFCI differs from the Branch Feeder AFCI in its ability to detect series arcing faults. The Branch Feeder AFCI can only detect line to neutral and line to ground arcing faults. Combination AFCIs provide protection against the high energy parallel (line to neutral and line to ground) arcing and low energy series arcing. "Combination" does not mean an AFCI + GFCI. Combination = parallel + series arcing. Combination AFCIs protect
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Siemens QA120AFCH 20-Amp Single-Pole with QAFH2 Combination AFCI Breaker 120V