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sptddog
Explorer
May 18, 2015

GFI and Power Cord Questions

Last year when I first got my new to me fuzion I had GFI issues where the GFI breaker in the camper's garage would trip. This would cut out the fireplace, the refrigerator, the DVD player, the 2nd air conditioner and the outlets behind the GFI string. Dealer looked at it once or twice and found nothing, and eventually we figured it was the campground power. Two of the places we had issue were at campgrounds with only 30amp service. For the rest of the summer, except at one campground, I had no issue what so ever.

This spring, I've had the issue again at 3 campgrounds, all on 50amp service. In troubleshooting, I've found the following things:

1. It's not the GFI outlet or breaker - the outlet was replaced and the breaker was checked by the dealer.
2. It will pop and will NOT reset again while on shore power. If I disconnect everything, turn on the generator, it resets within minutes and the camper seems to run fine (to it's defense, I have never fully powered the fridge and air conditioner to truly test it, but the fact that it immediately resets had indicated campground power). If I do manage to get it to reset on shore power, it generally takes leaving the camper disconnected for a few hours and then when I plug back into the pedestal it will be on for a few minutes and sometimes trip again, others it simply won't reset, period. This tripping is with NOTHING turned on or with little turned on. Sometimes though the fridge will be on and the GFI fine, and a while later I'll turn on the 2nd air conditioner and it will trip or I'll turn on the fireplace and that will trip it.
3. Sometimes it pops before I have anything turned on, but usually it's the air conditioner or fireplace that trips it. So, it works on a light load, but when a heavy use load is turned on it trips. But not every campground - some weekends it works completely fine with every outlet used, the air on, the fridge on and I'm using the central vac.


Once it started working more than not, I assumed that the campground had crappy pedestal power and not worried about it. But this spring it's doing it again at different campgrounds. Two of them are campgrounds we haven't been at, so it's still possible that it's pedestal power.

In order to keep troubleshooting, I'm contemplating a few things....

1. the camper has a threaded ring where the 50amp cord connects. The actual cord does not have a ring to screw around that thread. I assume that broke off. As such, the connection is a bit looser than ideal, but it certainly isn't falling out. Could this be an area where there is a leaking ground and as such tripping the GFI? Maybe some trips the cord is pulling on the connection more than others and doesn't get seated properly? Can I replace just the ring that is missing from my blue connector piece? Will annoy me to have to buy a whole new cord. If this could be causing it - perhaps that is why the dealer can't replicate the issue - I'm sure they use a cord they have laying around, rather than pulling mine out.

2. buying a voltage meter to check the pedestal at the campground. if I actually had one, perhaps I could validate that 1 leg wasn't getting the full power and maybe that lower voltage is causing the GFI to trip, which essentially knocks out that whole leg. At least I'd know it's not the camper, and I'd know not to get that site again....Can someone recommend me a voltage meter for this job (preferably on Amazon - where I can use the 2 day amazon prime shipping lol!)?

3. Would a surge help read the pedestal? I'm hating spending the extra for an LCD display surge if a voltage meter does the same thing?

4. When I arrived at the campground this weekend, after a brutally bumpy road, even though I was crawling along, my security light outside the front door was lit - the switch was not flipped, and the switch did not turn it off. The battery disconnect did not turn it off. Only fully unhooking the battery did the trip. Works fine after that, presumably the bumps knocked something in the wiring and that lit the light. while I've had this issue for a while, perhaps this wire is loose and has been causing a ground fault periodically? I don't think that light is on that leg, since it worked this weekend while the GFI was tripped and wouldn't reset, but I thought perhaps it could be related?

I am hoping to put the slides out and the beds down tonight, and power the generator up - and turn on air, and fireplace and anything I can just to validate that there is no issue on generator use. Assuming there is not, I keep going back to either the shore power cord or the shore power pedestal. First trip it was fine until I turned on the 2nd air conditioner. Second trip it tripped at one campground, reset and then worked fine (here I unplugged the power cord at the camper during the generator running to reset it) all weekend, even when we moved to a new campground. Third trip it tripped the first time turning on 2nd air. Left it unplugged for about 3-4 hours, and it reset. Avoided the air, but turned on the fireplace and that tripped it again.

Your wisdom and insight is always appreciated - I'm open to any other ideas to troubleshoot. It would be a lot easier to figure out if it was consistently not working, but some trips it works fine.
  • The grounding rod or grounding to the water pipe would tell you if you have a camper ground issue. (if it works fine after you do that, the camper's ground is sketchy)

    From what you described.. it sounds like the GFI are not wired correctly.

    While a GFI can be daisy chained on the same line, making all the plugs 'baby GFI's (because the real GFI will pop if any of the plugs fault) I don't like the practice. If your gonna have a GFI its usually for a reason (near water) and why skimp of safety.. pay the extra and have them all GFI plugs.

    I dont know off hand, but I am ASSUMING the GFI line is shorting and taking the other lines with it.. ie bad wiring, or a Mr Mouse has chewed wires and they are touching.

    This is where that multimeter I told you to buy comes in. with breakers off, the continunity check should read no beep (no connection) between the legs of the plugs on different breakers. Ground should beep. If they are connected, you have bad/mis wiring or a short (mr mouse)
  • Thanks for the insight! I guess what is so interesting is that it works fine much of the time, but others it just tanks.

    I should note that while it's the one GFI outlet that pops, no others do, and the entire line on that side of the breaker is down - so the GFI, 2nd AC, Fireplace, Fridge. I've flipped the breakers at the panel with no luck resetting. It's like that one GFI powers the whole line. And that GFI is what pops when I turn the 2nd AC on or the fireplace on, yet they are on different breakers. All on the left side of the main breakers in the box, but they each have their own circuit breaker.

    In my research I thought about the transfer switch, particularly because Keystone had a recall (and supposedly mine was replaced before I purchased it). But would the transfer switch allow full operation on generator but kill one leg of power if it was bad?

    How does one tell if it's the ground? And what is the fix?

    Do I turn the converter off at the breaker or do I need to actually find it and physically do something to turn it off?

    I'm crossing my fingers it's just the power cord lacking a tight fit because the ring is missing lol. I don't have shore power at home, so will have to wait until the next trip this weekend to validate that theory.
  • Im thinking a ground problem, or weak GFI. Here are a few ideas:

    *Get a multimeter! Preferrably a DC Amp clamp meter. (you can get one on amazon for about $50) MOST <$100 clamp meters do NOT measure DC amps. So read the features carefully.

    *Try turning the converter off and see if the problem happens. If the problem does not happen, verify that ground and neutral are not tied together on the converter.

    *Multiple GFI's in a chain can be interesting if one is going bad. ONE in the chain can trip them all. Even if that one is not being used. There is a GFI check tool but I am unsure that will help because it seems the GFI -is- working, its just too sensitive. (only as strong as the weakest link)

    *Is there anyway to isolate one branch at a time and have someone help you watch the plugs to see which pops first? (this may not be possible at all) A little more work would be to disable the plugs one at a time and see if the problem stops.

    *Because this is only happening on shore power,I'm leaning toward the shore power ground is 'better' than the ground on your camper so the GFI is having a fit. A fix for this is the dreaded grounding rod, and grounding your camper directly to Earth and seeing if that fixes your issue. OR.. attach a ground wire to the water spout at your camp site (assuming its metal)

    *I'm not surprised that it all works on your generator, which is about the same quality ground as your camper, which is to say your batteries.

    *The multimeter should have continuity check ability (it beeps when a direct connection is made).
    Check your cable to verify the + is only touching + and the - to - etc. Shake the cord and bend it a bit to make sure there is no 'accidental' connections esp. to ground.

    Hope this can help!

    GFI in my house kept tripping whenever anything was used. I was stumped. It was another plug in the chain that was faulting. Replaced it and no troubles since.

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