RoyB wrote:
You need to use one of these to test your house 15A receptacle before plugging into it.


Also always insure all three conductors are being used on the adapters. Some folks have cut the GROUND off of an extension cord or adapter.
I would never use a small round adapter but rather use a RV30A-15A long 'dogbone' type adapter (WALMART has them). The small round adapter always seem to get HOT for me and I was afraid of burning up my 30AMP shore power plug.

This is what I use to adapt to the 30-AMP RV plug from the 120VAC 15A receptacle or from the end of a 50-foot long HD Extension Cord (10-3) plugged into the house 15-AMP receptacle.

You don't want your 30AMP SHORE POWER PLUG to look like this from overheating the contacts.

Just my experience plugging into the house/garage 15-AMP receptacle.
Roy Ken
Roy, I would suggest that you had faulty wiring job in that 30 amp male plug in. I say that because the blades on the 30 amp male connector are twice the size of the blades on the 15 amp male connector. So it is impossible, with twice the material for conductivity, for that male plug to get hot. Also, both blades should have melted on that 30 amp plug, not just one, since they both flow equal amounts of current. If anything, if you are overdrawing, the 15 amp male plug should have been the resistance point and been the plug that started melting.
I think you got a bum wiring job on that 30 amp male plug, that was causing the resistance and the heat, and the melt on one blade.