The main characteristics of wire and cable products are: pure conductor metal, no insulation and sheath layer, such as steel-cored aluminum strand, copper-aluminum bus, electric locomotive wire, etc. Processing technology is mainly pressure processing, such as smelting, calendering, drawing, stranding / compression stranding and so on; Products are mainly used in suburbs, rural areas, main lines of users, switchgear, etc.

There are thousands of kinds of wire and cable products, which are used in all walks of life. They can be used for two purposes. One is the transmission of current, the other is the transmission of signals. The main technical performance indexes of transmission current cables are conductor resistance and voltage withstanding performance, and transmission performance, such as characteristic impedance, attenuation and crosstalk, are the main technical performance indexes of transmission signal cables. Of course, transmission signals mainly rely on current (electromagnetic wave) as a carrier, now with the development of science and technology can be used as a carrier to transmit light waves.