I'll start with a cynical layman's view and let the pros fine-tune it:.
This came from an internet source:
"An AFCI protection device will detect any 'arcing' (i.e. sparks, where electricity is being conducted through the air and converted to heat) and shut down the outlet before any damage can be done."
Shouldn't the AFCI device shut down the entire circuit?
What if the arcing is occurring in a wall somewhere and the AFCI cannot sense the added heat?
This is awkward, but...
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