Quote:
Originally Posted by prndl
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I found that the wall plug at my house I was using for my 120V source, one outlet was showing "open Ground".
Now why this did not show up using the tester inside the rig but only at the plug itself I don't know.
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The only thing I can think of that caused that is that the frame of the trailer is grounded making it electrically common to all other grounds including the main ground wire back to your power source. Since the source ground was open, it is possible that the trailer frame had a weak earth ground thru the jacks, just enough to allow the testers to show good ground, but not good enough to actually provide a good safety ground to drain off that frame voltage.
On the positive side, you now have an intimate knowledge of your entire power distribution system.
