Safety protection measures and requirements for safe use of wires and cables:

When the cables are interspersed with each other, the high-voltage wire shall be under the high-voltage cable. If one of the cables passes through the pipe within 1m before and after the insertion point for maintenance or separated by partition, the minimum allowable interval is 0.25m.

When the cable is close to or interspersed with the heating pipeline, if there are thermal insulation measures, the minimum interval between parallel and interspersed is 0.5m and 0.25m.

When the cable is interspersed with the railway or road, it shall be maintained through the pipe, and the maintenance pipe shall extend 2m beyond the road or road surface.

The distance between the cable and the foundation of the building shall ensure that the cable is buried outside the apron of the building; When the cable is led into the building, it shall be maintained through the pipe, and the maintenance pipe shall also exceed the apron of the building.

The distance between the cable indirectly buried underground and the grounding installed by ordinary grounding shall be 0.25 ~ 0.5m; The burial depth of cables indirectly buried underground shall not be less than 0.7m, and shall be buried under the frozen soil layer.

Using cable maintenance sleeves to maintain cables can achieve the following disadvantages:

Good corrosion resistance and long service life. It can be used in humid saline alkali areas.

Flame retardant, good heat resistance, can be used temporarily at 130 ℃ without deformation, and will not go out in case of fire.

High strength and stiffness. Directly buried under the carriageway without adding concrete maintenance layer can speed up the establishment progress of cable project.

The cable maintenance casing, whether pipe or pipe fitting, has certain flexibility and can resist the damage caused by external heavy pressure and foundation settlement.

It has good anti disturbance function of external signals.

The inner wall shall be lubricated without scratching the cable. The design adopts socket connection mode to facilitate the connection of the device. The joint is sealed with rubber sealing ring, which not only complies with the thermal expansion and cold contraction, but also avoids the entry of mud and sand.

If the cable is to be temporarily stored, according to the placement position of the cable:

Under the eaves. Cables can be used only when they are not indirectly exposed to sunlight or ultra-low temperature. It is recommended to use pipes.

On the outer wall. Prevent the wall from being damaged by indirect sunlight and personal injury.

In a pipe (plastic or metal). If in the pipe, pay attention to the damage of plastic pipe and the heat conduction of metal pipe.

Suspended / overhead cables. Consider the sagging and pressure of the cable, which binding method is planned, and whether the cable can be indirectly exposed to the sun.

It is laid indirectly in the underground cable trench, and this environment has a very small control range. The device of cable trench should stop the reflection of dry or wet level on a regular basis.

Underground pipes. It is convenient for future promotion, cable replacement, isolation from external pressure and surrounding environment, and auxiliary pipeline is a better method. But don't hope that the pipeline will always be dry, which will affect the choice of cable varieties.

Luoyang Asian Sun Cable Co., Ltd. is a manufacturer specializing in the production of wires and cables. The performances of Sanwu brａnd wires and cables produced by the company meet the requirements of the International Electrotechnical Commission and national standards. The leading products include bare conductors,aluminum alloy cables, PVC insulated power cables, control cables and other types of cables. Special cables can also be processed and customized according to the needs of users.