Poly copper wire with a super coating. Enamelled wire is copper wire that has a very thin insulating coating applied to it. It is employed in the production of speakers, motors, inductors, transformers, and other devices requiring tightly wound wire. The copper wire that has been enamelled is very practical since it is simple to solder. It justifies the employment of this wire type in the construction of transformers, inductors, and electromagnets. In dry settings, bare copper wire works well for purposes like electrical transmission.