Industrial wiring harnesses are electrical wiring systems used in industrial equipment and machinery. They provide reliable electrical connections and signal transmission by combining multiple wires, cables, and connectors. These harnesses are categorized based on their application areas, such as industrial automation, mechanical equipment, automotive manufacturing, aerospace, and energy industries. The classification also considers the number and types of wires included in the harness, which can range from a few to hundreds of wires with different specifications, colors, and purposes, including low voltage power lines, signal lines, sensor lines, and communication lines. The type of connectors used in the harness is another important aspect of classification, with common types including plugs, sockets, circular connectors, and rectangular connectors. Additionally, the adaptability of industrial wiring harnesses to different working environments is considered, as various industrial applications may have specific requirements such as high or low temperatures, humidity, corrosive or vibrating environments. Therefore, these harnesses need to possess appropriate protective features and durability to withstand such conditions.