Safety Requirements When Using Wires And Cables

1. When cables cross each other, the high-voltage cable should be below the low-voltage cable. If one of the cables is protected by a pipe or separated by a partition within 1m before and after the intersection, the minimum distance allowed is 0.25m.
2. When cables are close to or intersect with thermal pipes, if heat insulation measures are provided, the minimum parallel and crossing distances are 0.5m and 0.25m respectively.
3. When cables cross railways or roads, they should be protected by pipes. The protective pipes should extend beyond the track or road surface by 2m.
4. The distance between the cable and the foundation of the building should ensure that the cable is buried outside the building's water; when the cable is introduced into the building, it should be protected by a pipe, and the protective pipe should also be outside the building's water.
5. The distance between cables directly buried underground and the grounding of general grounding devices should be 0.25~0.5m; the burial depth of cables directly buried underground should generally not be less than 0.7m, and should be buried under the frozen soil layer.