浙江What are the safety requirements for the use of wires and cables?

Wire cable is usually a cord-like cable consisting of several or groups of conductors twisted together, each group of conductors insulated from each other, and often twisted around a center, with a highly insulated covering covering the whole. Erected in the air or installed in the ground, underwater, for telecommunications or electricity transmission. Cables can be divided into power cables, communication cables and control cables according to their uses. What are the safety requirements for the use of wire and cable? Listen to reel cable manufacturers.

1. When the cables cross each other, the high-voltage cable should be under the low-voltage cable. If one of the cables is protected by running pipes or separated by a partition board within 1m from the intersection point, the minimum allowable distance is 0.25m.

2. When the cable is close to or crosses the thermal pipe, if there are insulation measures, the smaller distance between parallel and cross is 0.5m and 0.25m respectively.

3, cable and railway or road crossing should wear pipe protection, protection pipe should extend out of the track or road surface 2m.

4, the distance between the cable and the building foundation, should be able to ensure that the cable buried in the building outside the water; When cables are led into buildings, they should be protected by pipes, and the pipes should be beyond the building water.

5, directly buried in the ground cable and the ground of the general grounding device should be 0.25~0.5m apart; Buried cables must be buried at a depth of at least 0.7m under the frozen soil layer.