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07-30-2017, 08:08 PM
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#1
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Junior Member
Join Date: Jul 2017
Location: New York
Posts: 21
SUN #9624
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Trailer trips garage gfci outlet
My 2005 T-2753 trips the GFCI out in my garage as soon as I plug it in. It does not trip a regular outlet. It's not my garage as I've tried plugging into other GFCI outlets along the way with the same result. Did some poking around in my converter box to see if the hot and neutral were reversed and they check out ok. Just looking to keep the battery charged and cool down the fridge in between trips. Anyone have ideas of where to start tracking the issue down?
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07-30-2017, 08:12 PM
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#2
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Senior Member
Join Date: Apr 2016
Location: Maryland
Posts: 488
SUN #8237
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Mine will trip a 15 amp breaker. Works ok on a 20 amp.
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John
2000 T2370
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07-30-2017, 08:38 PM
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#3
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
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This points to a possible wiring mix up.
You said you looked from the AC neutral and the AC hot tied together. This is good to check but that would cause a dead short and trip any breaker.
What you want to look for is AC neutral and earth ground or DC (-) negative tied to the AC neutral. That is a common cause of tripping a GFIC.
Sunline used white solid wire, part of a Romex cable to AC neutral. DC (-) negative was also a white wire but a stranded white wire, not solid. If they ever get crossed, they will for sure trip the GFIC.
See this thread it may help if you have an Ohm meter.
http://www.sunlineclub.com/forums/f7...ock-11647.html
You want to test the 30 amp plug for resistance between the ground lug and the AC neutral and the hot. Your digital meter should read OL on both. An analog meter will read 0. If there is low digit resistance, then you have a problem somewhere. Most times this happens in the converter panel and some one accidentally put a DC- wire on the AC neutral bus bar or a AC neutral on earth ground. Both are no/no's in a camper.
Hope this helps
John
Hope
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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07-31-2017, 08:04 PM
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#4
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Junior Member
Join Date: Jul 2017
Location: New York
Posts: 21
SUN #9624
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I found the issue after a process of elimination. Starting with the main feed cable coming into coverter box I disconnected one circuit at a time. After disconnecting each circuit I tested for continuity between the neutral and ground wires. When I got the 4th circuit down labeled "appliance" my meter beeped. Leaving it disconnected i powered things back up. The only outlet I found that didn't work was the kitchen counter. I pulled the outlet apart and there was quite a bit of extra wire. I believe ground was touching one of the neutral screws on the side. I tucked the wires back in the box neatly and and put everything back together. Working fine now plugged into the gfci in the garage. Thanks for your help.
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07-31-2017, 08:59 PM
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#5
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
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Great!!! Good job hunting this down.
Thanks for reporting back
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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08-01-2017, 05:06 PM
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#6
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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Yep the camper is a sub panel there white wires are grounds are not connected to the same buss bar like they are in a house so an issue like that can trip a house GFI.
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08-03-2017, 07:48 AM
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#7
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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GFI's go bad, old GFI were prone to nuisance tripping. If there are no problems found replace the GFI they are cheap. Check your camper power cord if the plug has been replaced take it apart I have seen a few with the black and white reversed the camper being a sub panel will function fine (but will not be safe) it will trip a GFI. With the wiring side facing you the black will be on the left white on the right and green on the top. There should be no 12 volt wiring inside the line side of a panel box. The white AC lines have a floating neutral it is isolated from the grounding system, the ground wires are landed on the box case grounding block then a ground AC wire (generally bare) is landed on the camper frame often along with DC grounds. If you stop and think about how the camper is wired you will see the logic it's all about never having a hot camper frame. Camp grounds if they can help it won't hire an electrician and lot of helpers do not know the difference between black and white!
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08-03-2017, 11:41 AM
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#8
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Junior Member
Join Date: Jul 2017
Location: New York
Posts: 21
SUN #9624
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Quote:
Originally Posted by mainah
GFI's go bad, old GFI were prone to nuisance tripping. If there are no problems found replace the GFI they are cheap. Check your camper power cord if the plug has been replaced take it apart I have seen a few with the black and white reversed the camper being a sub panel will function fine (but will not be safe) it will trip a GFI. With the wiring side facing you the black will be on the left white on the right and green on the top. There should be no 12 volt wiring inside the line side of a panel box. The white AC lines have a floating neutral it is isolated from the grounding system, the ground wires are landed on the box case grounding block then a ground AC wire (generally bare) is landed on the camper frame often along with DC grounds. If you stop and think about how the camper is wired you will see the logic it's all about never having a hot camper frame. Camp grounds if they can help it won't hire an electrician and lot of helpers do not know the difference between black and white!
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I'm pretty sure I found the problem in the kitchen counter outlet. I've went through and checked my incoming power and all other outlets to make sure they have the correct polarity. I check the outlet now every time before I plug into an unknown source. Thanks for the advice.
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Aaron
2005 Sunline T2753
2018 Chevrolet 1500 V8 5.3L LT Crew Cab
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08-03-2017, 03:32 PM
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#9
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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One of the more valuable tools you can buy costs about $5 it's a little plug in thing with 3 lights mine stays plugged into the GFI outlet and never gets removed.
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08-03-2017, 04:11 PM
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#10
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Moderator
Join Date: Nov 2006
Location: Ohio
Posts: 12,643
SUN #89
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Quote:
Originally Posted by mainah
One of the more valuable tools you can buy costs about $5 it's a little plug in thing with 3 lights mine stays plugged into the GFI outlet and never gets removed.
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I fully agree with using one of these at every campsite hookup to insure the power post is wired correctly. Some are not.
See mine here. You have to buy the 15 to 30 amp adapter separate to check the power post. Unplug it apart and you can test any receptacle in the camper or house. Very worthwhile.
mainah a question for you, have you ever been able to use of these to find earth ground connected to the AC neutral? Where does the power come from to run the lights? This may be one of the things it can't find.
I was going to suggest Aaron try one of these and then I looked up the spec's and I did not see any of them that can detect ground on an AC neutral. So I suggested old school and use an ohm meter which he did and found his issue. Did I miss something? May have, just asking.
Here is the manual for one of the new G & B ones. Look under spec's and download the manual Gardner Bender GRT-3500 Outlet Receptacle Tester and Circuit Analyzer, Indicates 5 Wiring Errors, Easy Read Chart, Comfort Grip, 120 VAC, 1/Each | Gardner Bender
Under notes item 7 it states "Will not indicate a reversal of grounded and grounding connectors"
Thanks
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
Google Custom Search For Sunline Owners Club
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08-03-2017, 05:09 PM
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#11
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Senior Member
Join Date: Apr 2011
Location: Maine
Posts: 3,357
SUN #2097
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Nope it won't because it works on all services sub or other wise. But it will show errors on either including generator power because the generator is not earth grounded.
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