Arc-fault circuit interrupter are safety switches, similar to GFCI, that are used to detect electrical arcing and shutoff power to prevent the risk of fire.

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What could be causing AFCI breaker and GFCI receptacle nuisance tripping?

I have a very unusual set of electrical issues that have proven difficult to troubleshoot. I live in a newly constructed house. Each bedroom has AFCI breakers. In the past 3 years living there, the ...
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Should I use a GFCI or AFCI circuit breaker with knob and tube wiring?

My American house was built in 1942, and much of the wiring is still knob-and-tube wiring (2-wire, no ground). Over the years new modern wiring has been added to the house, but we still have some KnT ...
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What is an Arc Fault Circuit Interrupter?

What is an Arc Fault Circuit Interrupter (AFCI) and where should they be used?
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What should I do if my vacuum trips my AFCI device?

I have a vacuum that trips the AFCI device of the circuit that services my bedroom. The vacuum has some age on it, and there is some wear on the motor's commutator. This wear causes electrical ...
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What options are there to achieve both grounding/ground-fault and arc-fault protection on old 2-wire circuits?

The three receptacle circuits in my house are 2-wire NM, but have 3-prong receptacles. My electrician recommended and installed GFCI breakers to provide "grounding" to these circuits. I now realize ...