110V trips the GFI on my garage? - Fiberglass RV


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Old 08-19-2013, 10:16 AM   #1
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110V trips the GFI on my garage?

I have a 2003 16' Scamp camper with A/C, frig, furnace and water heater. After towing it home from a camping trip the other day I plugged it in to my garage and it trips the GFI on my garage.

What I've tried so far:
3 different circuits on my house (trips all of them)
Tried plugging it in with the Scamp breakers off.
Tried plugging it in with the Scamp fuses out.
Tried plugging it in with the frig unplugged.
Tried a new plug in adapter and several different ext. cords.
Did a visual check in all the compartments and behind the convertor
for loose wires or connections.

There is not an outdoor outlet and there is no moisture or leaks anywhere. (it hasn't even rained since I towed it home)

Any suggestions would be appreciated.
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Old 08-19-2013, 04:59 PM   #2
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With all the stuff that you've done, I'd suggest checking the whole length of the cable from the external plug to the convertor. There may be a small tiny slit or something that's letting a little bit of moisture in. My GFI seems to blow whenever it's been particularly wet outside. I just reset it, and that seems to fix it. Until the next time it trips. Can you disconnect the mains cable from the convertor? Try that, and if it still trips the GFI its the Scamp mains cable.
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Old 08-19-2013, 06:12 PM   #3
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Bad male end on Scamps 30 amp cable? Yes unplug converter, blow? sacrifice a 3 wirw extension cord and cut the female end off and run that and wire it in to breaker box (doesnt have to be a 30 amp cord). still blow then its somewhere in the campers 110 wiring (outlets, clamping areas). wiring runs from street side (inlet) all the way around the camper on back wall, right past water tank (floor damp?) Mine goes under the water tank to refridgerator, Oh so many possiabilities
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Old 08-19-2013, 06:49 PM   #4
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Disconnect the 30 amp feed to your Scamp at the converter and isolate the wires . With an ohmmeter check for a ground or a short between the hot & neutral or hot and equipment ground or neutral & equipment ground . GFCI 's are affected by moisture but also by the length of the wire or cord run . If you can locate a 500 V megger you will get a better test than with an ohm meter because of higher impressed voltage
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Old 08-19-2013, 08:29 PM   #5
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I called Scamp today and they said that this issue has come up before and he pretty much told me that I should just plug in to an outlet that does not have GFI on that circuit so I did that and it does work.

Still think it is not right, I have had several campers and always use these outlets without a problem.
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Old 08-20-2013, 01:02 AM   #6
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GFI's are awful. You can try replacing it and see what happens. I mark mine every time they trip, the third time they get thrown away. I only use them where they're required.
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Old 08-20-2013, 01:09 AM   #7
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I can't run my power miter saw from a GFI but can from a regular circut with the same circut breaker.
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Old 08-20-2013, 06:58 AM   #8
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I have to disagree with Scamp - If your trailer is wired correctly, and all the receptacles & appliances are working properly, you should be able to plug it into a GFCI without a problem.

GFCIs will trip for two different reasons. The common one is when there is a difference in the hot & neutral current over 5ma. Modern GFCIs also include a circuit that detects faults between the neutral & ground.

If the GFCI trips with all the circuit breakers off, you have a ground/neutral fault. This can happen if the refrigerator or water heater electric element has failed (it may still work), there is water in a receptacle, or the converter is failing. Rather than retyping the entire post, I've written one describing how to find & fix GFCI faults at RV.net.
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Old 08-20-2013, 07:11 AM   #9
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Quote:
Originally Posted by Jerry . View Post
I plugged it in to my garage and it trips the GFI on my garage.

What I've tried so far:
3 different circuits on my house (trips all of them)
Quote:
Originally Posted by Jerry . View Post
Scamp ... told me that I should just plug in to an outlet that does not have GFI on that circuit so I did that and it does work.
I'm confused. Were all 4 circuits it tripped GFI?
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Old 08-20-2013, 07:15 AM   #10
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GFI trips

Quote:
Originally Posted by Jon Vermilye View Post
I have to disagree with Scamp - If your trailer is wired correctly, and all the receptacles & appliances are working properly, you should be able to plug it into a GFCI without a problem.

GFCIs will trip for two different reasons. The common one is when there is a difference in the hot & neutral current over 5ma. Modern GFCIs also include a circuit that detects faults between the neutral & ground.

If the GFCI trips with all the circuit breakers off, you have a ground/neutral fault. This can happen if the refrigerator or water heater electric element has failed (it may still work), there is water in a receptacle, or the converter is failing. Rather than retyping the entire post, I've written one describing how to find & fix GFCI faults at RV.net.
I totally agree that GFIs do serve a useful purpose. Try disconnecting the cord from the tailer if you can and then plugging it into the GFI. If it still trips then I think you have a faulty cord and you should replace it or repair it.

Good Luck in you Findings,
Alex
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Old 08-23-2013, 02:59 PM   #11
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I'm confused. Were all 4 circuits it tripped GFI?

The first 3 circuits all had GFI's and they tripped. (all my garage and exterior receptacles)

The 4th circuit inside the house did not have a GFI and everything works on the camper as it should. (ran an extension cord thru the front door and in to my living room)
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Old 08-23-2013, 04:04 PM   #12
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Originally Posted by Jerry . View Post
The first 3 circuits all had GFI's and they tripped. (all my garage and exterior receptacles)

The 4th circuit inside the house did not have a GFI and everything works on the camper as it should. (ran an extension cord thru the front door and in to my living room)
Are the 3 GFI outlets same circut breaker in house or different circuts? It sounds like you are saying totally different circuts (garage and exterior) just seeking clarifacation.
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Old 08-23-2013, 06:21 PM   #13
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Quote:
Originally Posted by Jerry . View Post
I have a 2003 16' Scamp camper with A/C, frig, furnace and water heater. After towing it home from a camping trip the other day I plugged it in to my garage and it trips the GFI on my garage.

What I've tried so far:
3 different circuits on my house (trips all of them)
Tried plugging it in with the Scamp breakers off.
Tried plugging it in with the Scamp fuses out.
Tried plugging it in with the frig unplugged.
Tried a new plug in adapter and several different ext. cords.
Did a visual check in all the compartments and behind the convertor
for loose wires or connections.

There is not an outdoor outlet and there is no moisture or leaks anywhere. (it hasn't even rained since I towed it home)

Any suggestions would be appreciated.
Your description of tripping 3 different circuits led me to believe you were tripping 3 different circuit breakers . It is difficult to diagnose a problem when the description is ambiguous . Tripping 4 different GFCIs is not the same as tripping 1 GFCI and 3 circuit breakers . Different types of GFCIs have different trip levels . and the length of the wiring run from the GFCI breaker in your panel to your outside receptacle plus a long run of extension cord to your trailer can introduce a capacitive current that causes a false tripping of the GFCI
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Old 08-23-2013, 06:56 PM   #14
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Are the 3 GFI outlets same circut breaker in house or different circuts? It sounds like you are saying totally different circuts (garage and exterior) just seeking clarifacation.
All 3 GFI's are on separate circuits.
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