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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New install: What's causing a tripping arc fault breaker?

We remodeled our home and had all new electrical put it in to plan. For rough-in, the electrician put in regular breakers instead of arc fault breakers. Arc fault breakers are required by code now ...
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Could my power strip have killed all my AFCI's?

Odd thing happened today. My wife plugged a 1700W (clothes) iron into a power strip and tripped the AFCI to the bedroom. I reckon with the TV and 2 lamps running it peaked over 15A and tripped out. ...
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Ever had LED bulbs cause AFCI tripping?

I replaced a 50W halogen gu10 bulb in a ceiling fixture on an AFCI-protected circuit with a 5W dimmable LED bulb, and it trips the breaker after a few seconds (even after reseating the bulb). Another ...
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What could be causing my AFCI to trip?

I recently purchased my first home and there is are two Leviton Outlet Branch Circuit AFCI receptacles installed. The line from the breaker box is split and each new line runs to an AFCI receptacle ...