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Why doesn`t the Outlet Branch Circuit AFCI satisfy the NEC?

The OBC AFCI cannot de-energize an arc fault on its supply side. De-energize means to disconnect the source of voltage. Also, it claims to detect series arcing faults on its supply side, but cannot protect against a line-to-neutral or a line-to-ground arc fault on its supply side. In other words, it only provides AFI protection on its load side. Therefore, it does not protect the entire circuit. Note also that the OBC AFCI is not included in the UL 1699 Standard.

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