Originally Posted by Darwin Maring
Here is something that every camper should have. Use it to test the camp ground power receptacle B 4 you connect the camper.
It verifies that the camp ground wiring is compatible with your camper and in accordance with the electrical
Should you get a RED lite, do not connect because it could be dangerous to you and your equipment.
Electrical Receptacle Tester with GFCI Diagnosis
This is a fine tester for checking polarity (black to brass , white to silver ,bare to green) and for checking if a GFCI will trip at the proper current level . It will not test for loose connection or damaged receptacles causing arcing faults or for spikes, dips or surges in voltage . Darwin is correct that reverse polarity can be harmful to many pieces of equipment and dangerous to human safety as well . This tester is often used by electrical
inspectors to test GFCI in homes (bath , kitchen ,garage ,outside) and receptacle polarity because it fits in their pocket , is easy to use,.hard to damage and cheap to buy.