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Arc Fault, GFI and Combo Breakers in a panel not tripping

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scottam99

Member
Location
Vero Beach Florida
One of our customers called a home inspector who tried to test all of the GFI's Arc Fault and Combo breakers. A;; of them just Hum.
I'm thinking a neutral is to blame. Anyone have this happen to them? I can't believe it's faulty breakers as they are different.
Square D QO Type breakers
 
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