FWIW: We bought a surge protector as a last minute purchase just before our first big trip cross country last year in our new RV. On our third night camping, just outside Yellowstone, our Progressive Industries EMS-30 gave a “Reverse Polarity” error code and shut down power from the pedestal. As I understand it, reverse polarity can cause a “hot skin” condition where your RV can shock you, and may also damage appliances. Money well spent, in my opinion!
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