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Old 08-23-2012, 02:50 PM   #1
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Electrical, incorrect grounding??

My next door neighbour has a brand new Keystone 30 ft trailer and when they touch door handles they get a little bit of an electrical shock. Worst when barefeet. It is plugged in to a GFCI plug at their house. It is not like static. Any ideas??
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Old 08-23-2012, 03:00 PM   #2
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Unplug it imediately. Need to check the power cord to the TT. Look for any rubbed or bare spots. May be a problem where it hooks up in the trailer also. Only do this while its not plugged in. If you know how to use a multi meter you can check for a short. If you are not comfortable doing the checks then please find someone qualified to do so. The situation you have described can be dangerous. Good luck!
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Old 08-23-2012, 03:17 PM   #3
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Quote:
Originally Posted by tomdinwv View Post
Unplug it imediately. Need to check the power cord to the TT. Look for any rubbed or bare spots. May be a problem where it hooks up in the trailer also. Only do this while its not plugged in. If you know how to use a multi meter you can check for a short. If you are not comfortable doing the checks then please find someone qualified to do so. The situation you have described can be dangerous. Good luck!
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Old 08-23-2012, 06:20 PM   #4
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If this problem was related to the 120V supply, why is the GFCI not tripping?? It's exactly what a GF circuit is designed to do... Would the 12 volts side give a shock??
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Old 08-23-2012, 06:46 PM   #5
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You would not feel a shock from 12 volts. Have you tried to trip the GFI to see if it's working properly? Also if you have a meter place one probe on the handle and the other to the ground and see what voltage you are reading. It sounds like a hot and neutral or ground may be reversed.

You are correct that the GFI should trip with any leaking current that is not running from hot to neutral. The only other consideration (that I can think of) is if the trailer has a miswired inverter that is in the inverting stage (on). Regardless it sounds like they need a pro to trouble-shoot the problem but I'd 1st make certain the GFI is working properly.
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Old 08-24-2012, 06:08 PM   #6
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Be sure you are using a good grounded and heavy wire extension cord or if you are using the unit cord with adapter make sure it is strong enough to pass the current The only other thing could be that the plug you are going into house current is not grounded properly.
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Old 08-24-2012, 06:58 PM   #7
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He is camping this weekemd with the electrician that wired his house. I know he is using an extension cord and an adapter (30 to 15amp) and the unit cord... The GF is working if you push test and reset. Will suggest he check ground. Will definitely report solution. Tx everyone!
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Old 08-24-2012, 07:03 PM   #8
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A three prong polarity checker for about $10 can check the polarity and check for functionality of the GFI. This is a VERY serious matter. Our trailer had the white common AC "grounded" to the trailer frame, the converter was also "grounded" to the frame. This fried the converter and left me with a hot frame. If I had not heard the battery boiling it may well have caused a serious problem, including electrocution.
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