Not Using a Surge Protector or Electrical Management System on your RV when connected to campground electric Low voltage causing excessive heat in the RV electrical system Lightning strike or power surge damaging the plug and the RV's electrical system Old Plug If you're using an old power cord or plug to connect to Campground electric A Short in the campgrounds electrical connection can cause your RV's plug to melt Using an improper size extension cord to connect to the RV Campgrounds electrical system which can heat up the plug enough to melt it