网址：www.csscable.com 2019-12-10 作者：admin 阅读：
Cables can be divided into power cables, communication cables and control cables according to their uses. Compared with the overhead line, the advantages of the cable are small insulation distance between lines, small floor space, underground laying without occupying the space above the ground, not affected by the surrounding environment pollution, high reliability of power transmission, small interference to personal safety and the surrounding environment. But the cost is high, the construction and maintenance are troublesome, and the manufacturing is also complex. Therefore, cables are mostly used in densely populated areas, power grids and places with heavy traffic, and long-span overhead lines can be avoided when they are laid across rivers, rivers and seafloors. Cables can also be used where the interference of overhead lines to communication needs to be avoided and where aesthetics or exposure of objects need to be considered.