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 > GFCI outlet is popping when I plug in coach

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Land Yachters

Philadelphia

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Posted: 11/01/20 12:12pm Link  |  Quote  |  Print  |  Notify Moderator

So, picked up our Tiffin 33aa from dealer for some various service issues. Went home and plugged in to same outlet I have been plugging into for a year outside. A 15 amp, exterior GFCI outlet that I just use for charging the batteries. I typically turn charger off when I plug in because I figure it’s a good idea to limit variables. I typically hear a “pop” at the surge box and then turn on charger and hook up trick L start for chassis battery. Today, as soon as I plug coach in, the outlet GFCI from the house pops. (the outlet I plug into outside). I checked power at outlet, extension cord, charger setting etc. and plugged in again. POP, the GFCI pops every time I plug coach in. Turn off batteries, check outlet with hair dryer and nothing I do can keep the outlet from popping. Start generator…all good. See GFCI in coach in bathroom popped. OK, I reset it thinking somehow that had something to do with issue. Shut generator off and plug in again. GFCI pops again that I am plugged into. (Also, GFCI in coach pops.) OK, I turn main 50 amp breaker in box OFF, thinking I could turn on circuits until I find one that pops outlet. Still, the outlet GFCI I am plugged into pops. I check charger/inverter breaker and it’s ok. No breaker on Surge Gard.

What am I missing?


Land Yachters
Griff, Ali and Coco
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enblethen

Moses Lake, WA

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Posted: 11/01/20 12:45pm Link  |  Quote  |  Print  |  Notify Moderator

What did the dealer do on your various service issues?
The GFCI is indicating fault in rig. Some items that could cause issue is grounded 120 volt element in refer. Try unplugging it. Try it again.
Grounded water heater element. disconnect wiring to element and try again.


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time2roll

Southern California

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Posted: 11/01/20 01:17pm Link  |  Quote  |  Print  |  Notify Moderator

Check your neutral and ground bus in the RV are separated and only grounds to ground and neutrals to neutral. Check for similar issue in your transfer switch. Keep the 50 amp breakers off. If there is no visual issue you will need to start disconnecting components to isolate the issue. Divide and conquer.


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houstonstroker

Houston, TX

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Posted: 11/01/20 01:45pm Link  |  Quote  |  Print  |  Notify Moderator

GFCI units (RVS) do not like to be plugged into GFCI outlets. My motorhome has GFCI breakers,. I turn these off while plugged in at my storage unit. Also GFCI outlets weaken over time. Leave your GFCI breakers or outlets off and plug in again.


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MrWizard

Traveling

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Posted: 11/01/20 02:01pm Link  |  Quote  |  Print  |  Notify Moderator

Circuit breakers even the 50 amp main
Only open the hot leads, not the neutral
Everything ok on generator
Seems like you have a neutral to ground leak , between the automatic transfer switch and the RV 50 amp male, could be the doggone adapter for your shore cord, could be the shore cord 50 amp male plug
Could be a loose connection from shore cord at the ATS


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Old-Biscuit

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Posted: 11/01/20 02:08pm Link  |  Quote  |  Print  |  Notify Moderator

You posted:
OK, I turn main 50 amp breaker in box OFF, thinking I could turn on circuits until I find one that pops outlet. Still, the outlet GFCI I am plugged into pops

Your issue is between the GFCI Outlet and your MAIN AC Panel

Adapters, Extension cords, main power cord, AC REEL (if equipped) ATS

Anyone of those could be 'leaking'....only takes a few milliamps on Ground circuit to trip a GFCI

Leave RV Main 50A CBs OFF
Reset the GFCI
Then plug in each item (adapter/cords etc) one at a time
IF it only trips when you plug in RV Main Power Cord then you will need to check cord, REEL (if Equipped) and ATS more closely

Could try replacing the GFCI Outlet ...they do get weak



***Did Dealer do ANY electrical repairs/work???
If YES....recheck that work


Is it time for your medication or mine?


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wgriswold

Lake Tahoe

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Posted: 11/01/20 02:24pm Link  |  Quote  |  Print  |  Notify Moderator

Land Yachters wrote:

OK, I turn main 50 amp breaker in box OFF, thinking I could turn on circuits until I find one that pops outlet. Still, the outlet GFCI I am plugged into pops. I check charger/inverter breaker and it’s ok. No breaker on Surge Gard.

What am I missing?


I had this same problem. It turned out to be where the cord is connected to the trailer system in a junction box. One of the twist on connectors had come loose and the wire insulation was burned. I fixed that the the problem was gone.


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cavie

Port Charlotte Fl/ Hindsdale MA

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Posted: 11/01/20 02:42pm Link  |  Quote  |  Print  |  Notify Moderator

turn of the GFI in the RV.some GFI's don't play nice in series. Just can't use the GFI circuit.


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BB_TX

McKinney, Texas

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Posted: 11/01/20 04:06pm Link  |  Quote  |  Print  |  Notify Moderator

Old-Biscuit wrote:

You posted:
OK, I turn main 50 amp breaker in box OFF, thinking I could turn on circuits until I find one that pops outlet. Still, the outlet GFCI I am plugged into pops

Your issue is between the GFCI Outlet and your MAIN AC Panel

Adapters, Extension cords, main power cord, AC REEL (if equipped) ATS

Anyone of those could be 'leaking'....only takes a few milliamps on Ground circuit to trip a GFCI

Leave RV Main 50A CBs OFF
Reset the GFCI
Then plug in each item (adapter/cords etc) one at a time
IF it only trips when you plug in RV Main Power Cord then you will need to check cord, REEL (if Equipped) and ATS more closely

Could try replacing the GFCI Outlet ...they do get weak



***Did Dealer do ANY electrical repairs/work???
If YES....recheck that work

Listen to Old Biscuit. The GFCI trips when there is as little as 5 milliamperes difference between the current flow thru the hot pin of the GFCI and the current flow thru the neutral pin of the GFCI. If the main 50 amp breaker is off then there should be no flow at all down stream of that breaker. That means the problem is ahead of that breaker.

Started occurring after service is certainly a questionable coincidence.

jkwilson

Indiana

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Posted: 11/01/20 05:02pm Link  |  Quote  |  Print  |  Notify Moderator

The problem is almost certainly a ground/neutral connection at the transfer switch as time2roll said. A GFCI. will also trip on a ground/neutral connection downstream, and transfer switches are often miswired. The breaker won’t affect this as it doesn’t disconnect the ground or neutral.


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