You forgot the idiots disconnecting the shore power cord from the boat, leaving it on the dock still powered!! Some of the new plugs have LEDs...
I don’t know.... when using the correct size terminal, which was the case here, the wire fits snugly in the terminal with full contact all...
The only heat dissipation on the terminal would have been the breaker and it shows no sign of heat whatsoever. solder on marine terminal? I...