I have a pre-lit incandescent Christmas tree that was attacked by my cat. I'm trying to splice the wires back together.
My string of lights has a "thick" rubber wire (16 gauge) and a "thin" rubber wire (18 gauge) twined together. The 16 gauge wire has standard stranded copper inside. The 18 gauge wire contains what looks like cotton or polyester thread.
What in the world am I looking at? I can't imagine it's electrically conducting, so what is its purpose, and how do I splice it?