when i plugin my vacuum cleaner to my bathroom GFCI outlet without turning on the vacuum the GFCI outlet trips. but it works in any other outlets
There are two possibilities:
- False Positive
This is rare, but it can happen. More likely with AFCI (because it has a more complex problem detection mechanism) than with GFCI. Extremely unlikely when the plugged in device is off, which is the specific situation here.
- True Positive
This means your vacuum cleaner has a ground fault. That is a potentially serious problem. It could be a design issue, but if it used to work and now it doesn't work then it points to a problem such as worn out insulation that is allowing a small amount of current to leak to ground, which will then trip the GFCI.
The way to tell for sure (well, reasonably sure) is to plug the vacuum cleaner into a different GFCI. GFCI has been required for bathroom receptacles and kitchen countertop receptacles for many years, so if you have a GFCI in the bathroom there is a good chance you have a GFCI in the kitchen. If the problem does not happen on any other GFCI then it may indeed be a bad GFCI. If the problem happens on every GFCI then you have a bad vacuum cleaner.
With the vacuum turned off there is only 1 possibility. Yes the vacuum could be totally save but have a lighted switch , to ground 6 ma and the GFCI trips
OR another failure.
The cord set has a indirect fault to ground both are the same to the GFCI more than 6ma flowing in the hot to earth and the reason for a trip where a normal outlet works fine.
In both cases it is the same fault an imbalance on the hot and neutral.
One is a valid Ground fault the other is not as the vacuum is operating (or not in this case switch off).
maybe your GFCI is just doing its job.
Test it by pushing the Test button.
Since it triggers the GFCI without turning on the power to vacuum cleaner it could be wear and tear off the vacuum cleaner cable.
Vacuum cleaner cable are exposed to high stress levels, twisting, coiling, pulling, dog ?
Either on the cable plug side or on the vacuum cleaner connection, there might be a very small short inside the cable, that would not show when plugging in regular outlets.
If the GFCI is defective it will trigger even when you plug in Hairdryer.
Inspect the vacuum cable connection to the vacuum, repair or replace.