I moved my rig into position to get ready for our eclipse vacation. I have a 30A receptacle that I can use in this parking spot (RV is 50A). It's fairly new and only 6' 12ga from the main breaker box.
12ga is too small for 30amp circuit, too small for 25 amps
12ga is rated at 20amps to not get hot
in open air wiring, it might carry 40-50, but it would get dangerously hot
the minimum ga for 30amps is 10ga, for a 30amp dryer plug
and 8ga or larger is better for having an RV plugged in running a/c units
the heat is coming from the plug because of the 12ga wire is getting hot
this is a fire looking to happen
or did you mean to say 12ft of 6ga wire