I was looking at polarity testers for checking the power stands at campgrounds before paying for the site and seeing them in the $40-50 range and knowing that you also should check the voltage too, so I was checking the net and found this site and good info and a tester that they had made up .
http://www.myrv.us/electric/Pg/testing.htm
http://www.myrv.us/electric/Pg/tester_30amp.htm
and their tester
So I figured I would make my own version, this one would have been about $34 to make up. I will have my parts tomorrow and will post up my version.
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