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    Blackwing's Avatar
    Blackwing Posts: 1, Reputation: 1
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    #1

    Feb 15, 2013, 09:09 AM
    Shared neutral on arc fault circuit
    I have an old house we are partially rewiring. To meet the NEC we have installed arc fault breakers where required. In one bed room the circuit breaker will not remain set. I have checked the boxes and verified all of the connections and can find no problem. Could we have a shared neutral in some of the old wiring?? Would this cause the arc fault to trip?
    hfcarson's Avatar
    hfcarson Posts: 1,003, Reputation: 49
    Ultra Member
    		  
    #2

    Feb 15, 2013, 09:42 AM
    Or you could be having an Arc Fault?
    Either way, try to troubleshoot this circuit... disconnect the circuit somewhere near the middle and see if the breaker will reset. If not, continue dividing the circuit until it clears... now you will have a much better idea of where the problem is...
    Good luck...
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    Feb 15, 2013, 03:10 PM
    Or you could have a neutral touching a ground somewhere.

    Why did you install the arc-faults? You do not need them on old wiring to meet NEC code. These requirements are not retroactive.
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #4

    Feb 15, 2013, 09:17 PM
    Have you swapped breakers with one known to be good? Defective arc fault breakers are far from unheard of.
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