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odd color copper wire

1964 Views 3 Replies 3 Participants Last post by  theatretch85
I replaced 2 6g leads for my ac(240v) that had smaller leads... the old copper leads, one looked shiny copper and the other was a dull copper with some blackish spotting on it...

what would cause the copper to dis-color?

also I clamped an amp meter on to each lead and they both pulled 19 amps each...(dont know if that helps any)
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connections were tight... insulation good, no cracks, not brittle, no burning, only dull copper with some blackish spotting ...
everything was/is working normal, I was working in the panel and saw the dis-colored copper on the lead...
1 - 2 of 4 Posts
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