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07-21-2020, 07:21 AM
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#1
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Golden, Colorado
Posts: 838
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GFI Tripping
Has anybody figured out why some coaches will pop the GFI on the shore line when plugged into 20 amp GFI plug. It will run on standard 20 amp plug just fine......
Thank you
Dave
__________________
2004 Monaco Signature with a Detroit 60, Vorad Radar, Samsung Fridge, Induction cook top, 2020 GMC Denali
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07-21-2020, 07:28 AM
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#2
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Senior Member
Join Date: Mar 2019
Posts: 226
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My coach had the ground and neutral wires reversed as the power entered the coach. It would pop the shore power every time, and sometimes do weird things, like power only half the coach at some RV parks. It took me 3 years to finally get frustrated enough to dig into the rear panel and find the cross wire problem!
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07-21-2020, 07:43 AM
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#3
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Senior Member
Join Date: Jul 2014
Posts: 35,411
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It will run on a standard outlet but all may not be fine with it, if it trips a GFCI.
In some cases, the inverter/charger has a neutral to ground, bonding relay, that doesn't open that bond fast enough for the GFCI.
Some water heaters leak current between ground and neutral, if damaged, causing a trip.
Some fridge ice makers have the same current leak.
I believe that many surge protection devices may also trip up the GFCI during its testing routine.
I'm sure there are more things that trip them up. Things like add on chargers or battery maintainers.
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07-21-2020, 06:26 PM
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#4
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Senior Member
Join Date: Nov 2018
Posts: 356
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It is most likely a ground neutral problem, or what is seen as a short when a motor starts. Also, GFCI's do go bad.
Roadmiester
09 Dynasty Regal IV
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07-21-2020, 07:02 PM
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#5
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Community Moderator
Monaco Owners Club
Join Date: Jul 2016
Location: Central, Arkansas
Posts: 11,285
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I did. My extension cord had the hot and neutral reversed.
__________________
2004 Beaver Monterey Laguna IV
Cummins ISC 350HP Allison 3000 6 speed
2020 Chevy Equinox Premier 2.0t 9 speed AWD
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07-22-2020, 07:57 AM
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#6
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Senior Member
Join Date: Mar 2019
Posts: 226
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If it is not a cross wire, you can test the appliances on the coach by turning all the breakers off, and then back on one at a time to see which is causing the trip. Or, do the opposite way by turning the most likely circuit breaker off for a while to see if there is a trip. Give plenty of time for the appliance to come on before deciding on each circuit.
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07-22-2020, 08:48 AM
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#7
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Senior Member
Join Date: Jul 2014
Posts: 35,411
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Switching off breakers disconnects the hot ( black ) wire.
The neutral of that breaker feed is still connected and if it's leaking to ground, you still have a ground fault. Ground faults don't need power to cause a trip.
Pulling a plug OR disconnecting the white neutral wire at the appliance is the best way to hunt down a ground fault.
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07-22-2020, 10:19 AM
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#8
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Golden, Colorado
Posts: 838
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Thank you for all the info... I will start trying things...
Safe travels
Dave
__________________
2004 Monaco Signature with a Detroit 60, Vorad Radar, Samsung Fridge, Induction cook top, 2020 GMC Denali
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