An arc fault occurs when electricity is allowed to arc-to travel
via-a spark usually from hot wire to a neutral or ground wire.
Arc faults most often occur in lamp or appliance cord , and it
also happends in electrical box as when a hot wire with -
damaged insulation touches a bare ground wire.
this arc ( spark) can creats a fire hazard, A gfci breaker
will likly shut off when there is an shoort ( spark) .
AFCI is more reliable , for that resson AFCI are now requird
by most local codes for city and county.
ITs good idea for bedrooms for living room as well.
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