No shore power to coach

[ToyMan]

Shore power to the coach disappeared tonight. Open bay one and something was clicking very loudly.
Then a relay on my Allen Bradley computer started arcing inside. I replaced the relay and it behaved normally. Still no shore power.

I then checked the plug and the black wire had melted and came loose from the connector. Apparently it got hot enough to fuse itself to the common (white) wire. However, there was no short between the white and black wire as only the exterior coating had merely stuck together).

Replaced plug but still not getting shore power to the coach. Fired up the generator and that gives me AC power.

Has anyone ever experienced this problem?

Any tips would be greatly appreciated.

BTW, I did verify that power was at the box where I plugged into.