1. When H07RNF rubber cables are crossed, the high-voltage cables should be under the low-voltage cables. If one of the H07RNF rubber cables is protected by a pipe or separated by a partition within 1m before and after the intersection, the minimum allowable distance is 0.25m.

      2. When the H07RNF rubber cable approaches or crosses the heating pipe, if there are heat insulation measures, the minimum distance between parallel and cross is 0.5m and 0.25m respectively.

      3. When H07RNF rubber cable crosses railway or highway, it should be protected by pipeline. The protection tube should exceed the track or road by 2m.

      4. The distance between the H07RNF rubber cable and the foundation of the building should be able to ensure that the cable is buried outside the water of the building; when the cable is introduced into the building, there should be pipe protection, and the protective tube should also be outside the water surface of the building.

      5. The distance between the direct connection cable of the general grounding device and the earth should be 0.25~0.5m; the buried depth of the H07RNF rubber cable directly buried in the ground should generally not be less than 0.7m, and should be buried below the frozen soil layer.