Copper wre is a metal and is used in electric and electronic compounds, so that it can flow electricity very easily as it is a good conductr of electricity. This is a type of a metal in which there are many types of contente present in the same and it is cadmium free copper as well as also know with the name” electrolyt copper ” which is 100% pure. Bare copper wire is complexx shape wire and cable. Bare coper wire in use as overhead source for subways, light and heavy transit systems, electrically powered mine trains, buses and industrial cranes.