OK, so I pulled the 40 amp breaker and will go to a 30 amp breaker with 10AWG.

At least that way it will pop before things get hot. I might even go back to 20 amp breaker. It was working fine with the 20 amp breaker. Mainly I wanted to go from a 20 amp plug to a 50 amp plug cuz that's what I've found at most shops/yards that I might have some work.