Wires and cables are the fundamental conduits that transmit electrical power and communication signals, composed of conductive metal cores typically copper or aluminum protected by insulation, shielding, and outer jackets designed to meet voltage, environmental, and safety requirements. Their significance emerged during the late 19th and early 20th centuries, when insulated cable systems replaced exposed conductors, enabling the safe expansion of urban electrification and industrial growth. As polymer insulation, metallurgical techniques, and standardized safety codes advanced through the mid-20th century, cables were adapted for higher voltages, longer transmission distances, and specialized applications in telecommunications, railways, and manufacturing.