Usually consists of several wires or groups of wires [ Each group has at least two wires ] Twisted together to form a rope-like cable , Each group of wires is insulated from each other , And often twisted around a central core , The whole outside is covered with a highly insulated covering layer 。

Wire and cable refers to materials used for power, communication and related transmission purposes. “ Wire ” and “ Cable ” There is no strict boundary. Products with few cores, small diameter, and simple structure are usually called wires; those without insulation are called bare wires, and others are called cables; conductors with larger cross-sectional areas ( greater than 6 square millimeters ) are called large wires, and smaller ones ( less than or equal to 6 square millimeters ) are called small wires, and insulated wires are also called cloth wires.

Wires and cables mainly include bare wires, magnet wires, and insulated wires for motors and electrical appliances, power cables, communication cables and optical cables. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, etc. They are all composed of multiple strands of wires and are used to connect circuits, electrical appliances, etc.