Wires that are electrically conductive are used to transmit electrical potential from one point to another. The wires usually consist of an electrical conductor and an electrical insulator that is coated on the conductor. Conductor wires Wires are generally made of copper or aluminum or their compounds. Copper conduction is better than aluminum, so copper wires perform better, although they are more expensive. Insulation of wires is made of plastic material whose task is to provide electrical insulation of wire with electrical potential from its surroundings. Wires are available in different thicknesses and shapes depending on their application.