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GFCI weirdness #4775858
06/02/18 09:07 PM
06/02/18 09:07 PM
Joined: Dec 2002
Posts: 42,455
New Jersey
JHZR2 Offline OP
JHZR2  Offline OP
Joined: Dec 2002
Posts: 42,455
New Jersey
A number of years back, I installed a sub panel in my basement. It runs some 240V AC loads and provides a few circuits. Those circuits are in my basement, one dedicated for the sump pump, one dedicated for the dehumidifier.

The dehumidifier, as a non critical load, is on a gfci since I figure it's on the ground and in case of a flood, I'd like it to trip there asa first line of defense. The gfci and dehumidifier work perfect.

I have another circuit fed from my main panel, which is for other basement outlets. The first outlet in the line is a gfci. Recently the GFCI has been tripping, and my wife has correlated it to when the dehumidifier comes on.

There is no chance of a shared neutral, it doesn't happen any other time, so I assume the one gfci is bad. Any ideas why this would happen? Not only is it two different circuits, but one is actually off a subpanel. I'm tempted to swap the tripping GFCI to a regular outlet, but I'd rather not.

I did have a fluorescent light on a different circuit, which would trip a GFCI outlet on the SAME circuit. I plugged the light in via a surge protector and it has not happened since. I guess it needed the filter. Perhaps it's something like that for the dehumidifier? Even if so, it's different circuits this time, so any startup noise issues would need to resonate all the way to the main panel somehow...

Thanks!

Re: GFCI weirdness [Re: JHZR2] #4775861
06/02/18 09:11 PM
06/02/18 09:11 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
Check your neutral and ground at the sub panel. Make sure theyre not bonded there

Last edited by mx5miata; 06/02/18 09:12 PM.

NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: GFCI weirdness [Re: mx5miata] #4775862
06/02/18 09:12 PM
06/02/18 09:12 PM
Joined: Dec 2002
Posts: 42,455
New Jersey
JHZR2 Offline OP
JHZR2  Offline OP
Joined: Dec 2002
Posts: 42,455
New Jersey
Originally Posted By: mx5miata
Check your neutral and ground at the sub panel. Make sure theyre not bonded there


They're definitely not.

Re: GFCI weirdness [Re: JHZR2] #4775866
06/02/18 09:16 PM
06/02/18 09:16 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
Normally appliance loads arent on gfci due to the start up load of a motor or compressor could trip the gfci.


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: GFCI weirdness [Re: JHZR2] #4775870
06/02/18 09:18 PM
06/02/18 09:18 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
Did you go down the buss bar to check if any lugs come loose over time a loose neutral can cause resistance. And be tripping on ground


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: GFCI weirdness [Re: mx5miata] #4775885
06/02/18 09:33 PM
06/02/18 09:33 PM
Joined: Dec 2002
Posts: 42,455
New Jersey
JHZR2 Offline OP
JHZR2  Offline OP
Joined: Dec 2002
Posts: 42,455
New Jersey
Originally Posted By: mx5miata
Normally appliance loads arent on gfci due to the start up load of a motor or compressor could trip the gfci.


Agreed, but since the dehumidifier is in my basement, next to the sump hole (which never has water, fwiw), on the ground, I figure if there ever was water I'd like a GFCI to protect it.

It's not like a freezer or something that could have bad consequences if the GFCI tripped. And it NEVER has.

The GFCI that IS tripping is a basic loop of outlets in my basement, which only feed a few lights and a battery charger. No appliances. Yet it is tripping, even with all loads off!

Originally Posted By: mx5miata
Did you go down the buss bar to check if any lugs come loose over time a loose neutral can cause resistance. And be tripping on ground


No I have not. Good point. But the GFCI that is tripping does so even if all loads on it are off.

Re: GFCI weirdness [Re: JHZR2] #4775895
06/02/18 09:42 PM
06/02/18 09:42 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
Good chance the gfci is on its way out. Have you had any power surges or lightning lately the logic board inside may have took a hit electricity is a funny thing


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: GFCI weirdness [Re: JHZR2] #4775896
06/02/18 09:43 PM
06/02/18 09:43 PM
Joined: Apr 2018
Posts: 619
Canada
nap Offline
nap  Offline
Joined: Apr 2018
Posts: 619
Canada
Let me guess, Leviton brand?

Re: GFCI weirdness [Re: JHZR2] #4775903
06/02/18 09:46 PM
06/02/18 09:46 PM
Joined: Jul 2017
Posts: 419
PR CA, USA
2strokeNorthstar Offline
2strokeNorthstar  Offline
Joined: Jul 2017
Posts: 419
PR CA, USA
defective or loose wire at an outlet.


2001 F150 5.4L 140k miles
2013 Nissan Juke Nismo 80k
2000 Honda S2000 183k
1998 BMW 328i 170k
Re: GFCI weirdness [Re: JHZR2] #4775904
06/02/18 09:47 PM
06/02/18 09:47 PM
Joined: Mar 2010
Posts: 654
NY
mx5miata Offline
mx5miata  Offline
Joined: Mar 2010
Posts: 654
NY
If the gfci isnt faulty i feel its a neutral related issue.


NAPA FULL SYNTHETIC 0w20 Partsplus oil filter
Wix air filter
Re: GFCI weirdness [Re: JHZR2] #4775913
06/02/18 09:58 PM
06/02/18 09:58 PM
Joined: Jan 2011
Posts: 3,321
PV Az
AZjeff Offline
AZjeff  Offline
Joined: Jan 2011
Posts: 3,321
PV Az
Swap your 2 GFCI outlets.


86 Samurai 1.3 leftovers
14 RAV4 2.5 5W-20 PP
16 Silverado 1500 4.3, DI, AFM 5W-30 PP

The most important thing to do in your life is to not interfere with someone else's life. - Frank Zappa

Re: GFCI weirdness [Re: JHZR2] #4776081
06/03/18 07:14 AM
06/03/18 07:14 AM
Joined: Aug 2012
Posts: 448
North Carolina
Urshurak776 Offline
Urshurak776  Offline
Joined: Aug 2012
Posts: 448
North Carolina
I had a similar problem in my garage. The GFCI outlet kept tripping. Since it was 18 years old I replaced it and haven't had a problem since. I did install a Leviton brand. Is that bad?


2012 Hyundai Santa Fe, 138,000 miles, Havoline Pro DS Full Syn 5W-30, WIX Filter.
2014 Kia Rio, 80,000 miles, Havoline Pro DS Syn 5W-30, WIX Filter.
Re: GFCI weirdness [Re: JHZR2] #4776095
06/03/18 07:27 AM
06/03/18 07:27 AM
Joined: Aug 2012
Posts: 448
North Carolina
Urshurak776 Offline
Urshurak776  Offline
Joined: Aug 2012
Posts: 448
North Carolina
I had a similar problem in my garage. The GFCI outlet kept tripping. Since it was 18 years old I replaced it and haven't had a problem since. I did install a Leviton brand. Is that bad?


2012 Hyundai Santa Fe, 138,000 miles, Havoline Pro DS Full Syn 5W-30, WIX Filter.
2014 Kia Rio, 80,000 miles, Havoline Pro DS Syn 5W-30, WIX Filter.
Re: GFCI weirdness [Re: JHZR2] #4776096
06/03/18 07:29 AM
06/03/18 07:29 AM
Joined: Aug 2012
Posts: 448
North Carolina
Urshurak776 Offline
Urshurak776  Offline
Joined: Aug 2012
Posts: 448
North Carolina
I apologize for double post. I tried to delete one but it wont let me.....


2012 Hyundai Santa Fe, 138,000 miles, Havoline Pro DS Full Syn 5W-30, WIX Filter.
2014 Kia Rio, 80,000 miles, Havoline Pro DS Syn 5W-30, WIX Filter.
Re: GFCI weirdness [Re: JHZR2] #4776098
06/03/18 07:30 AM
06/03/18 07:30 AM
Joined: Jun 2003
Posts: 5,973
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,973
Illinois
I've had to replace some after nearby lightning strikes.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
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