Originally Posted by GaryNK
Doing a one night at a friends. Plugged in to their 30 amp and got a Reverse Polarity error = problem for friend. With adapter, ran a cord to a normal outside receptacle without error code so energized the rv for the night. I expected the RV Power Distribution Monitor to read 15 Amp but the reading was 30. As we didnít need AC, I wasnít concerned about adjusting around. The thought is that the owner actually has a 30 amp service at that receptacle, a possible problem for friend or the rv monitor displays 30 on a 15 amp service?
Hard to speculate without more detailed info. What is giving the error? RV power Distribution Monitor??
No way can you "normally" get 30A from a 15A outlet.
Did your friend or a unlicensed electrician install the 30A receptacle?
From the web-
Reverse Polarity means neutral and hot are reversed, but the voltage is still correct at 120v (more or less). The way to test for it is to put a voltmeter between the neutral and ground terminals and test for zero voltage. Then, to double check, put the voltmeter between the hot & ground and check for 120v.
Most things still work when the polarity is reversed, but there are two potential problems:
1. Increased shock hazard
2. Some (few) things are polarity sensitive and not smart enough to verify the input power polarity. Those will either not work or go up in smoke.