A cable is an electrical or signal transmission device typically composed of several wires or groups of wires, featuring an internal conductive core and an external insulating layer. Cables are used for transmitting electrical (magnetic) energy and information, facilitating the conversion of electromagnetic energy. They are widely employed in urban underground power grids, transmission lines from power stations, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. Cables come in various types, including power cables, control cables, compensation cables, shielded cables, and high-temperature cables. They are made up of single or multiple wires and insulating layers, used to connect circuits and electrical appliances.
