Wire and cable are wire products used to transmit electrical (magnetic) energy, information, and achieve electromagnetic energy conversion. The broad sense of wire and cable is also abbreviated as cable, while the narrow sense of cable refers to insulated cable, which can be defined as: a collection composed of the following parts; One or more insulated wire cores, as well as their respective possible cladding, overall protective layer, and outer protective layer, may also have additional uninsulated conductors in the cable. The main characteristics of bare wire body products in this category are: pure conductor metal, without insulation or sheath layer, such as steel core aluminum stranded wire, copper aluminum busbar, electric locomotive wire, etc; The processing technology mainly involves pressure processing, such as melting, rolling, drawing, stranding/compression stranding, etc; The product is mainly used in suburban areas, rural areas, user mainlines, switchgear, etc. The main characteristics of this type of product for power cables are: extruding (winding) an insulation layer outside the conductor, such as overhead insulated cables, or twisting several cores (corresponding to the phase, zero, and ground wires of the power system), such as overhead insulated cables with two or more cores, or adding a protective layer, such as plastic/rubber sheathed power cable. The main process technologies include drawing, stranding, insulation extrusion (wrapping), cable forming, armor and sheath extrusion, etc. The different process combinations of various products have certain differences. The product is mainly used for the transmission of strong electrical energy in power generation, distribution, transmission, transformation, and power supply lines, with high current (tens to thousands of amperes) and high voltage (220V to 35kV and above)