It might be another name for "Domestic" & my scrap buyer changed Microwave transformer coils to 'Domestic Copper' a few years ago.
I wasn't happy about it & he said that "It's because of the extra varnish & paper on them".
He was a new guy & I don't really like him much but I think that with the changeover of employee they used this as a chance to regrade & degrade their classifications.
But if it's clean motor windings, like fridge compressors, without any joins on the wire or insulation, except for the varnish.
Nah, To me that's still "Copper #2"
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