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Is a CAFI (combination arc-fault interrupter) circuit breaker merely a combination of an AFI breaker and a GFI breaker?

Published date: 30 April 2020

Issue:
Is a CAFI (combination arc-fault interrupter) circuit breaker merely a combination of an AFI breaker and a GFI breaker?

Product Line:
QO and HOM CAFI breakers

Environment:
Residential Electrical Distribution

Cause:
Confusing industry terminology

Resolution:
No, the CAFI (Combination Arc-Fault) breakers do not provide GFI level (6 mA) personnel protection.
"Combination" refers only to its rating for both parallel and series arc protection. 

Arc-fault and GFI personnel protection are provided by the DF (dual-function) circuit breakers however.  Catalog number example:  QO120DF and QO120PDF (with plug-on neutral).

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