Enameled Copper Wire , otherwise known as winding wire or magnet wire, is a highly versatile material used principally in applications that require electrical transference including transformers, inductors, motors, generators, speakers, hard disk actuators, electromagnets and other applications that require tight coils of insulated wire. Enameled Round Wire The insulation or overcoating used on enameled round wire is a type of polymer film (varnish) made from a variety of resins—typically ...