delfadelfa
Member
- Location
- Cincinnati, OH
I had a customer call about and arc-fault tripping when his treadmill is running. This is a two year old condo. He did not have a problem until he bought a new treadmill and plugged it in a finished basement receptacle. It does not trip the treadmill circuit but two other arc-fault breakers. I pulled both breakers and made sure they were wired with the correct neutrals. I added a 20 amp dedicated circuit by the panel for the treadmill and started the treadmill, within a minute both breakers tripped. I checked the phases to see if the tripped breakers were on the same phase as my new circuit. Only one arc-fault was on the same phase as the new circuit with the treadmill. I switched both arc-fault breakers, this made no difference, the new arc-fault breakers tripped only when the treadmill was running just like the other ones. The treadmill is rated for a total of 11 amps, it never pulled more than 7 amps. The two tripping arc-fault breakers will not trip when the treadmill is not running. Has anybody run into anything like this where a circuit not connected to anything else in the house is tripping two other circuits??