I have a 40-foot Holiday Rambler diesel pusher.
I bought one of the little yellow power post testers that shows if it's safe to use.
My question is: If I plug into the 120 plug and the lights show OK, does that mean the 30-amp and 50-amp are safe, or just the 120-volt ?
I have a pigtail that I can use to check the wiring through the 30-amp plug, but what about the 50-amp?
I've never had a problem, but I pretty much stay at well-maintained parks because my wife uses a walker and can't deal with uneven ground.