I had a similar situation with a GFI receptacle, the brand name I do not recall but it was a 20 amp which was installed in my kitchen. This GFI receptacle arc so bad that it melted an area around the hot screw and half way up the wire still inside the plastic box. I replaced it with a new GFI and took the rbad receptacle to an electrical vendor I happen to do usiness with. He looked at it and then contacted the manufacturer to figure out what went wrong. The problem he was told was that the screw with the burnt wire had come loose which eventually caused the arcing around the screw. The vendor commented that it was a good thing that I replaced it when I did. He gave me a new GFI receptacle which I still have in the box. Wayne Baldie
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