AFCI breaker hums

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Old 06-24-07, 04:39 PM
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Question AFCI breaker hums

I am wiring an addition bedroom with a 15-A circuit for lights and a 20-A circuit for plugs. Both have Siemens QAF AFCI breakers. I can hear both breakers humming a bit when I stand near my service panel. It's not too loud, but is noticeable. Only the AFCI's are humming; other breakers are fine. Is this common with AFCI's?
 
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Old 06-24-07, 06:23 PM
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Inspect the wire going into the breaker. Sometimes these screws need to be tighted down more.
 
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