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Old 07-21-2019, 11:51 AM   #1
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Electrical short on GFCI supply circuit

Hi everyone, this is my first post. I searched the forums for something similar without any luck but my wife says I'm horrible at finding stuff so please advise if this is covered somewhere. Trying to avoid a 600 km round trip to the dealer.

My 2019 Flagstaff e-pro e19fd appears to have a short between the live and ground wire on the GFI outlet supply cable (less than 1 ohm). The resistance reading was done with both ends of the cable disconnected (no inverter or GFCI receptical).

The cable appears to run under the floor from the inverter directly to the GFCI outlet line side and then goes on to feeds all the other outlets. It's the same color and type of cable at both ends but not certain if there are any buses or junctions under the floor?

Unless running off the batteries the inverter is in bypass mode. The short was causing the inverter to trip its built-in breaker. I found the short when I disconnected the cable to test the inverter, fortunately the inverter is still functioning properly. Also tested the GFCI and it's also ok.

Not sure when the short occured but I think while driving.

Question: The cable runs in the floor and appears to be accessible from under the trailer but there is a protective black under layer material that I think if removed I could see the cables and find the fault? Or maybe I'm missing something reladed to the short? Any and all sugestions very much appreciated.

Cheers!
Steve
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Old 07-21-2019, 12:04 PM   #2
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It is very possible there is a staple or screw that finally made its way through the Romex due to the vibration of towing. It might be easier depending on the config of your unit to simply run a new piece of Romex from the inverter to the first GFCI and cut the bad piece out of the circuit. If you do this suggest you tag both ends of the old Romex you cut from the circuit of future reference or the next owner.
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Old 07-21-2019, 12:32 PM   #3
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Quote:
Originally Posted by Flybob View Post
It is very possible there is a staple or screw that finally made its way through the Romex due to the vibration of towing. It might be easier depending on the config of your unit to simply run a new piece of Romex from the inverter to the first GFCI and cut the bad piece out of the circuit. If you do this suggest you tag both ends of the old Romex you cut from the circuit of future reference or the next owner.
Thank you, sounds like the easiest fix. Will contact my dealer to see if they have any suggestions for fishing a new cable through the floor. Access angles are not the best
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