I have an outlet that burned up pretty badly - it is on a recently run 20 amp circuit. I had a space heater plugged into a heavy duty extension cord running from this outlet. From what I have read it seems,like this is often caused by loose wiring but I don't believe that is the case here. I have cut back the hard wiring to a point where the wire is clean and free of any burning and want to replace the outlet but am really concerned with what may have caused the problem in the first place. I feel like the outlet may have just been overloaded is that likely?
From the comments you seemed to just have a weirdo defective receptacle. Don't buy the contractor pack 2 for .99 cents. Buy a good 20A receptacle for a few bucks and put it all back together. 12 ga wire will handle 15 amps which is all a space heater should ever pull. Fire it up and monitor it for a bit. If anything is questionable, I would start to look at the space heater itself but then again your breaker should trip before anything gets out of hand.