I have a 100 amp sub panel in garage,new addition above garage.2 arc faults serving lighting in the addition and 1 arc fault serving plugs in the addition.garage plugs are dedicated.When I plug chop saw or any large load in garage plugs it trips arc fault breakers that are on same phase. When I plug something in to the other phase like bath plug it trips the other arc fault breaker on that phase.These arc fault breakers will not trip unless there is a load.This is a older house and the only outlets affecting these arc faults is on the new sub panel.I can plug a halogen light in the arc fault circ that only has plugs, and it doesn't
trip.When I put a roto zip or vacume it does.I have tried these arc fault brakers in my own 100 amp sub panel and they do not trip with a vacume or roto zip.I have checked all nuetral connections at this house including transformer and meter.Please help.
What is happening is the white wire that comes off the breaker is probably too close to another neutral or too close to a hot wire that is on one of the other circuits that will make it trip when you use a drill etc... Check to see if the coiled up white wire off of the breaker is not near a hot in the panel. I have had lots of arc fault breakers trip for that reason.
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