Recent content by ZG1K

PVC (PolyVinylChloride) is C2H3Cl. There is certainly chlorine in it.

The powder is CuCl. PVC is 60% chlorine which provides the catalyst for the change, and the location of the wire provided the environment. The copper wire at some point heated to over 450C and reacted with the chlorine in the PVC. This is much more likely to happen in stranded wire, especially...