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What are the requirements for the control cable circuit?

Update:20-02-2021
Summary:

Common faults of control cable lines include mechanical […]

Common faults of control cable lines include mechanical damage, insulation damage, insulation dampness, insulation degradation, overvoltage, and cable overheating. When the above-mentioned fault occurs in the line, the power supply of the faulty control cable should be cut off, the fault point should be found, and the fault should be checked and analyzed, and then repaired and tested. The power supply can be restored after troubleshooting.

Requirements for buried control cable lines include:
When the control cables cross each other, the high voltage cables should be lower than the low voltage cables.
When the control cable crosses the railway or highway, it should be protected by a pipe, and the protective pipe should extend 2m from the track or road surface.
The distance between the control cable and the building foundation should ensure that the cable is buried outside the building's scattered water; when the cable is introduced into the building, it should be protected by a pipeline, and the protection pipeline should also extend beyond the periphery of the building.