
Why did this receptacle melt?
I plugged in a 1500 W heater and it stopped working. No breaker was tripped. A 3 prong tester said on every respectable in the circuit that hot and ground were swapped. I knew that was impossible because the circuit had just been working. AI said it was likely an open neutral.
Opened all the receptacles in the circuit that I could identify and the picture shown is the most upstream receptacle.
The white lead connected to the melted terminal had charred insulation but otherwise didn't seem broken.
I removed the receptacle, tied the feed wire to the load wire and all the receptacles test out as wired correctly.
Is there a way to know why this receptacle melted? I suppose it could have happened in the past and then was pushed to a point of full failure when running the heater.
The only thing plugged into the bad outlet recently has been a window fan.
It's a bit scary, that looks really close to a fire to me and I'm not sure if I should try to draw 1500 W from this circuit again.