Classification of power cables:
1.According to the voltage grade: can be divided into low voltage cable (generally refers to 1kV and below), medium voltage cable (3 ~ 35kV), high voltage cable (66kV and above).
2.According to the insulation material: oil soaked paper insulated cable, plastic insulated cable, rubber insulated cable and so on.
3.According to the laying method, it can be divided into direct buried cables, overhead cables, pipeline cables, etc.