One strand is copper colored, and the other is silver. Are they both copper? I though the silver strand was tinned copper, but upon further investigation, it is silver all the way through. I've seen similar wire bundled with a Htib a little while ago. So, what is it? thanks
It's to help you properly identify polarity one of strands has been tinned. With a clear jacket you need an identifier to make sure you maintain proper connection (Red to Red, Black to Black) and this is one of the methods of doing so.