Although the wire and cable industry is only a supporting industry, it occupies a large proportion of output value. It has a wide range of products, including automotive electronic wires, high-temperature wires, etc., with a wide range of applications, involving electric power, construction, communication, manufacturing and other industries, and are closely related to various sectors of the national economy. Wires and cables are known as the "arteries" and "nerves" of the national economy. They are essential equipment for the transmission of electric energy, the transmission of information, the manufacture of various motors, instruments, and meters, and the realization of electromagnetic energy conversion. They are the future electrification and informationization. Basic products necessary for society.

    The wire and cable industry is the second largest industry after the automobile industry, with a product variety satisfaction rate and market share exceeding 90%. Worldwide, China's total wire and cable output value has surpassed the United States, becoming the world's largest wire and cable producer. With the rapid development of China's wire and cable industry, the number of new companies has continued to rise, and the overall technical level of the industry has been improved.

The main industries of the cable industry are subdivided into wind power cables and power cables.

Wind power cables. The main performance requirements of electronic cables for wind power generation are mostly used in areas with harsh weather conditions. The temperature is cold and the temperature difference between day and night is large. Therefore, it should have good low temperature resistance and can withstand -40. C is low temperature, and has excellent UV resistance and weather resistance. Wind power cables are divided into mobile and fixed installation cables according to the occasion of use. Mobile cables need to be twisted frequently, so they should have good torsion resistance and curvy performance. Sometimes they will be exposed to oil, and they will be corroded by seawater in special environments. They should have oil and corrosion resistance.

It has good flame-retardant performance, and the selected conductor of the material can be made of flexible copper wire of category 5 or category 6 specified in GB/T 3956. The surface should be smooth, free of oil stains, and no damage to the insulation burr. 6mm2 and above are twisted The structural insulation of the twisted structure adopts ethylene propylene rubber or silicon rubber, which has excellent ozone resistance and heat aging resistance. The sheath adopts chlorinated polyethylene, neoprene rubber or chlorosulfonated polyethylene, which has oil resistance and cold resistance.

    Low-voltage power cables lkV and below are used in electric power, metallurgy, machinery, construction and other industries; about 50% are used in the power distribution network of the power system to send electricity from high-voltage substations to cities and remote areas; the rest are used in the construction industry, machinery, Metallurgical, chemical and petrochemical enterprises, etc.; medium voltage power cables 3-35kV are mostly used in urban high-voltage power distribution networks; some are used for internal power supply of large enterprises, such as large steel and petrochemical enterprises; high-voltage power cables 66-330kV are mainly used Leading line at the large tortoise station. Economically developed countries such as Europe and the United States will also use it for super-large cities and other high-load network ultra-high voltage power cables 330-500kV Shanghai, Beijing and other domestic super-large cities also plan to use ultra-high voltage cables for urban power transmission and distribution networks.