Copper conductors are very valued forms of steel, normally accessible as wires or cables. The two most popular types of solitary conductor wires are THW and THWN/THHN. The wires on their own is usually either solid or stranded and so are protected by metal or plastic sheathing. Copper stands robust https://shanemurww.suomiblog.com/detailed-notes-on-copper-wire-scrap-rate-47778874