Any good EMS will catch most wiring errors. My previous coach was all aluminum except for the brakes, wheels and steering system (UltraVan). Hot skin was always a worry. There are small plugin circuit testers and voltage/frequency monitors that will alarm if all is not right. I learned to take my Digital Line Monitor from Automated Engineering Corporation with the proper adapters attached and plug it into the pedestal to check everything BEFORE I plug in the coach. Even with a hard wired EMS, I still check any electrical receptacle for the RV.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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