"Dave Platt" wrote in message


I've seen conductors and braid turn green over a period of time, in
wires and cables which were manufactured with certain types of PVC
(polyvinyl chloride) insulation. I've read that this is due to the
tendency of certain PVC formulations to "outgas" a small amount of
chlorine over a period of years - this excess chlorine combines with
the copper to form a patina of copper chloride.

One of the worst cases I ever had of this was with Monster Cable.