Generally, the bare wire core is exposed to the atmosphere and is easily corroded. Even the BV wire manufactured according to the requirements of GB5023--1985, commonly known as the "insulated wire", its pressure level is limited to low pressure, and the outdoor erection will be less than 5 years. Aging cracks and loses its original performance. The most obvious feature of overhead insulated conductors compared to bare conductors or other wires and cables is weathering resistance.
It can resist strong ultraviolet light and rain, snow, hail, sand and other harsh climates, high temperature resistance, low temperature resistance, effective protection against smoke, chemical gases and other infringements and frequent trunk tree branches, so overhead insulated wires can extend the life of the line. Overhead insulated conductors are more susceptible to corrosion when exposed to bare earth cores. Even BV lines manufactured in accordance with GB 5023-1985 are commonly known as "insulated wires". Their withstand voltage is limited to low voltage and outdoor erection. In less than 5 years, it will aging and crack, losing its original performance. The most obvious feature of overhead insulated conductors compared to bare conductors or other wires and cables is weathering resistance. It can resist strong ultraviolet light and rain, snow, hail, wind and other harsh weather, high temperature, low temperature resistance, effective protection against smoke, chemical gases and other infringements and frequent trunk tree branches, so overhead insulated wires can extend the service life of the line.
Compared with overhead bare conductors, the use of overhead insulated conductors can appropriately reduce the distance between the conductors of the conductors and the spacing of the buildings. Especially when the urban network is reconstructed in the residential urban areas built in the 1980s and 1990s, the use of overhead insulated conductors can be used. Conveniently penetrate into the load center, shorten the power supply radius of the low-voltage line, and improve the power quality.