After some testing with different wires, I realized that wire stripper is not good for a mixture of wires, yet effective for a few of cable types, it is not going to work with other types, after some research on google, you need to look for a copper wire shredder, here is a link for one,

http://www.recyclerssource.com/PDFs/Cable-Shredder.pdf

This would shred the wires, to small sizes, then use air to separate the light plastics from the heavier copper granules,



Regards,
Kevin