A bare wire is a wire without any insulation or protective covering. In addition to the wires that transmit electricity and information, it can also be used to make the components and connectors of the electric motor. Generally copper, aluminum, copper alloy, aluminum alloy. In addition, there are all kinds of insulated wires suitable for special requirements, such as low-voltage power lines for automobiles, high-voltage ignition wires for automobiles, electrical wiring for electrical appliances, aerial conductors, compensation wires, etc. The cable is used for transmission, distribution of electrical energy or transmission of electrical signals. The cable can be divided into power cable, communication cable and control cable according to its use.