They usually come stuck together as one unit with 2 sockets - like this one on amazon
Sometimes you can get single outlets in one device box, but this looks like a double based on the location of the plate screw.
Thank you for the response ithinarine!
>You normally don't get that kind of melting except for when the connections to the plug are loose. When you install a new one, make sure your wires are tightening down very well.
The connections were wrapped around the screw on the receptacles very tightly, there was no wiggle room
>Also, 1580W continuous load on a 15A circuit that only has a maximum of 1800W available is a HUGE continuous load for a 15A circuit.
Right, I am only using that 15a circuit only for this one purpose. And it has worked for months (Jan - April) of this year without a problem on a different receptacle.
Like I said the only difference this time around where the melting occured is when I decided to use a different receptacle and using a Belkin Wemo Insight smart plug to monitor the watt usage
Anyway, I plan to use this receptacle instead next time instead of this one that I used before
Should this help my cause?