I never saw my 120 volt red reverse polarity light on my circuit breaker panal go on in all the years I've been living on board.
When we connected to shore power
in a upscale marina the red light was glowing dimmly. Everything was running fine on my end so I didn't think must about it. The next day I mentioned to the dockmaster that my reverse light was on. He investigated and found the boat
next to us had a 50 to 30 amp defective connector.
Two days later the light went on again in the evening while it was raining heavily. The dockmaster came to my boat
at 1 AM to inform me that I was causing the reverse polarity on his boat and tripping his main circuit breaker.
I found my 50 to 30 amp Y-adapter was shorting out in the center. Eliminated the connector and everything was fine. Three days later the reverse light went on again, this time a boat four slips over had a receptacle that was nearly melting. This went on two more times.
Odd that my boat seems to be the troubleshooting tool for the marina and that I have possibly prevented a fire.
Has anyone else experienced this?