It is a Surge Guard. Just got off the phone with a licensed electrician that I know. He told me things will run with reverse polarity but sensitive items will definitely be affected. Everything seems to be ok inside but there was definitely enough heat to start a fire. He said the only thing that might have saved the day was the fact that the hot wire burned through at the Rv wall connector breaking the circuit.
I keep thinking if we would have had a fire, would that be the time the entry door latch would break. Feel pretty lucky right now
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