I'm just explaining the theory of nuisance tripping due to inductance, not claiming that it is common. In fact I rarely see it associated with standard household appliances. I work in an industrial enviornment and I do see it occassionally. In fact just the other day I ran into it. One of the labs had supplied an X-Y stepper motor positioning table which also contained flourescent lighting via a GFI. With this load the GFI did not stand a chance, tripped constantly and there was NO leakage to ground. This was classic inductive load nuissance tripping. Nuissance tripping due to actual leakage current to ground is a separate issue and I agree that most houshold appliances, motors, tools etc. have overcome this problem [Linked Image]