Heli_av8tor
Well-known member
I've never had a problem plugging into a 20 amp GFI outlet using a dogbone adapter until now. I last plugged into a GFI a month ago without problems.
Now it trips the GFI on the sticks & bricks outlet instantly. All circuits appear to work normally if powered by the Genny. However it doesn't have GFI protection.
This coach has a 30 amp system.
Just prior to plugging in I power washed the Genny and basement compartments. There is an outlet in two of the basement compartments that could have gotten some overspray. The Genny got soaked.
Checking at the Shore Power plug I get 0.6 ohms - virtually shorted between the neutral and the ground pins. Thinking the wet Genny was likely the culprit I completely unhooked it from the coach with no change.
Next I went to the breaker panel. I started pulling the 8 neutral wires one at a time. Five of the neutrals (which includes the feed neutral) had infinite resistance to the ground bus. One measured 3.72 Megohms and another 1.9 Megohms. However one was at 1.6 ohms - shorted.
Leaving this neutral disconnected and the corresponding breaker off I was able to connect to shore power without tripping the GFI.
This circuit powers six outlets: two in the bedroom slide, two in the dining/couch slide, and two in the bedroom. None of these outlets have anything plugged into them. I don't think water is a factor. There's been no change a day and a half after washing. And I don't think water could have gotten to a junction or outlet anyway.
I haven't been able to locate any of the junction boxes. There are no signs of burning or other outlet problems.
Any thoughts on troubleshooting this problem?
Thanks, Tom
Now it trips the GFI on the sticks & bricks outlet instantly. All circuits appear to work normally if powered by the Genny. However it doesn't have GFI protection.
This coach has a 30 amp system.
Just prior to plugging in I power washed the Genny and basement compartments. There is an outlet in two of the basement compartments that could have gotten some overspray. The Genny got soaked.
Checking at the Shore Power plug I get 0.6 ohms - virtually shorted between the neutral and the ground pins. Thinking the wet Genny was likely the culprit I completely unhooked it from the coach with no change.
Next I went to the breaker panel. I started pulling the 8 neutral wires one at a time. Five of the neutrals (which includes the feed neutral) had infinite resistance to the ground bus. One measured 3.72 Megohms and another 1.9 Megohms. However one was at 1.6 ohms - shorted.
Leaving this neutral disconnected and the corresponding breaker off I was able to connect to shore power without tripping the GFI.
This circuit powers six outlets: two in the bedroom slide, two in the dining/couch slide, and two in the bedroom. None of these outlets have anything plugged into them. I don't think water is a factor. There's been no change a day and a half after washing. And I don't think water could have gotten to a junction or outlet anyway.
I haven't been able to locate any of the junction boxes. There are no signs of burning or other outlet problems.
Any thoughts on troubleshooting this problem?
Thanks, Tom