The cable core is wound with fine copper wire and serves as a power cable for mobile equipment. Wire and cable refer to materials used for power, communication and related transmission purposes. There is no hard and fast line between "wire" and "cable." Generally, the products with fewer cores, small diameter and simple structure are called wires, those without insulation are called bare wires, and the others are called cables. The conductor with a larger cross-sectional area (greater than 6 square millimeters) is called a large wire, and the smaller one (less than or equal to 6 square millimeters) is called a small wire, and the insulated wire is also called a cloth wire.