Copper Clad Wire

The cable I have is 5 wires with paper strands running alongside. All covered with a heavy insulation. Each wire is made up of 30-50? very fine copper strands. Very flexible. Each wire is insulated with a rather thick yet soft insulator. Overall the conductor is heavier than a 10 guage. I had been using this as a long extension cord to get 220 out to a garage. That has been done properly now so the cable is just taking up space. Thanks for the help! Edit: just checked it out. Only 3 wires,each 65 strands of 0.008 dia. copper wire.