1. The cable line can be concealed or clearly set. Concealed cables can be laid along cable tunnels or cable trenches or buried directly underground. Compared with overhead lines, buried cable lines have good safety performance, but the installation cost is high.

2. Cables must be kept at a certain distance from each other, between cables and pipes or with other underground buildings. Otherwise, an accident may occur due to leakage of the cable sheath and damage due to the distance. For buried cables, a plan should be drawn for data storage and signs should be provided where necessary. In order to prevent mechanical damage, cable above 1000V should be armored cable, and the radius should not be too small when bending.

3, indoor cable lines should be as clear as possible, when buried underground should be worn. The distance between the indoor cable and the heat pipe shall not be less than 1m. Otherwise, the heat insulation device shall be added; the distance between the cable and other pipes shall not be less than 0.5m. Otherwise, appropriate protective measures shall be taken; the distance between the low voltage cables is generally Not less than 35mm; the distance between high and low voltage cables is generally not less than 150mm.

Allowable distance m when laying cables and pipes close to or crossing

4. When inspecting and repairing buried cable lines, in order to prevent residual charge from injuring people, discharge should be done first. The discharge should also be performed after the insulation test.