Buried Cable Safety Requirements

The correct arrangement for crossing cables is to ensure that the high-voltage cable is positioned below the low-voltage cable. In cases where one of the cables is shielded by a protective pipe or separated by a partition within a 1m proximity before and after the intersection, the minimum safe distance allowed is 0.15m. To emphasize, it is important to prioritize the positioning of the high-voltage cable beneath the low-voltage cable when they intersect. Additionally, if any protective measures such as a pipe or partition are present, a minimum distance of 0.15m should be maintained.

If the cable is in close proximity to or intersects with the heat pipe, it is necessary to implement thermal insulation measures. In such cases, the minimum distance required between parallel cable and heat pipe is 0.5m, while for crossed cable and heat pipe the minimum distance is 0.15m. It is crucial to adhere to these specifications to ensure proper insulation and prevent any potential overheating issues.

To ensure safety, it is required that a pipe is used to protect the cable when it intersects with a railway or road. Moreover, the protective pipe should extend a minimum of 2m beyond the surface of the track or road.

To ensure the cable is safely buried outside the building's water, it is crucial to maintain a suitable distance between the cable and the building foundation. Additionally, when introducing the cable into the building, it is essential to provide protection by utilizing a pipe. It is important to note that the protection pipe should extend beyond the building's water to ensure complete safeguarding of the cable.

To ensure proper grounding, it is recommended to have a distance of 0.15~0.5m between the cable that is directly buried underground and the grounding of the general grounding device. Moreover, the cable should be buried at a depth of no less than 0.7m, and it should be placed under the frozen soil layer. These measures serve to maintain the safety and integrity of the grounding system.