Power supply trips GFCI
08-07-2012, 01:51 PM
#1
Power supply trips GFCI
I've got my garage/workshop wired with two 20amp circuits. They're also GFCI protected. I've never had a problem with them until I plugged my new power supply in and it trips the GFCI (not the breaker). The power supply works fine on a non GFCI outlet. What would cause this? Is it likely the power supply, or the GFCI (it does it on both circuits)
08-08-2012, 02:09 PM
#3
some if not all new hairdryers have a GFCI on the plug that almost always (nowadays), get plugged into a GFCI in your bathroom without issue. GFCI's trip due to sensing a leaking of current somewhere or are just faulty. I would try plugging in the power supply on another GFCI in your house (different circuit) and see if that trips. if it does trip it, I would look at the power supply...
08-09-2012, 03:05 PM
#4
well, I tried it out on another GFCI circuit in the house and it held.. Took it back out to the garage and it trips both circuits instantly. I suppose it could be two faulty GFCIs, but seems more likely that it's something else. All the outlets test correctly (wired correctly, have a good ground, etc). Thanks for your help, I'll have to do some more research.
08-09-2012, 04:31 PM
#5
well, I tried it out on another GFCI circuit in the house and it held.. Took it back out to the garage and it trips both circuits instantly. I suppose it could be two faulty GFCIs, but seems more likely that it's something else. All the outlets test correctly (wired correctly, have a good ground, etc). Thanks for your help, I'll have to do some more research.
), mentioned that I needed a GFCI outlet for anything in the basement now and that washer machines are known to trip them, she recommended I install a 20a GFCI and avoid the 15a ones as again they tend to trip on washer machines. I did already wire the circuits with 12g and a 20a breaker, so no sweat there. Maybe look at the GFCI that holds and see if its 20a vs 15a, also I found they make some real crappy quality GFCI's (walmart, big lots etc), I bought a few at the local home center (Leviton) and has not tripped on anything in about a yr.
08-09-2012, 05:40 PM
#6
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Maybe the following will help, I had a city electrical inspector review my newly install 125a sub panel I put in along with 2 new circuits for our washer and dryer. She (yes, she ), mentioned that I needed a GFCI outlet for anything in the basement now and that washer machines are known to trip them, she recommended I install a 20a GFCI and avoid the 15a ones as again they tend to trip on washer machines. I did already wire the circuits with 12g and a 20a breaker, so no sweat there. Maybe look at the GFCI that holds and see if its 20a vs 15a, also I found they make some real crappy quality GFCI's (walmart, big lots etc), I bought a few at the local home center (Leviton) and has not tripped on anything in about a yr.
), mentioned that I needed a GFCI outlet for anything in the basement now and that washer machines are known to trip them, she recommended I install a 20a GFCI and avoid the 15a ones as again they tend to trip on washer machines. I did already wire the circuits with 12g and a 20a breaker, so no sweat there. Maybe look at the GFCI that holds and see if its 20a vs 15a, also I found they make some real crappy quality GFCI's (walmart, big lots etc), I bought a few at the local home center (Leviton) and has not tripped on anything in about a yr.one) cheap GFI's or old and weak GFI's can trip easy.
two) The load from your PS may be a lil over what your GFI can handle....
( I have a 500W 40A PS for my quad charger, so guess what Im watching for on the wall.....)
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