What should be paid attention to when laying cables directly? Under what circumstances is it used? Cable exporter china Shenghua will introduce the points for attention when laying cables directly to you today. For direct buried laying, it is necessary to consider whether the cable is easily damaged by external impact.

1. If it will not be subject to a big impact, it is possible to lay it directly.

2. If it may be subjected to some relatively large impacts, but the strength can be controlled within a certain range, the direct burial of armor can be considered.

3. If the external force is greater, it is necessary to use a protective casing, which can be set locally (such as through the road).

Features of direct burial of cables

Advantages: easy to lay, save materials and labor.

Disadvantages: maintenance is inconvenient. If maintenance is required, the covering soil needs to be excavated. It is only recommended for use in places where maintenance is not considered or can be accepted. When buried directly, it is generally necessary to pad it with yellow sand.

Points for attention when laying cables directly

Question 1

How to find the fault point when the directly buried cable is grounded?

A: Use a line inspection cable tester.

Question 2

Do direct buried cables need cable wells?

Supplementary question: For cable laying in the factory area, armored cables are used for direct burial. Do cable wells need to be added at the crossing and the power distribution room in the workshop? Is it necessary to add a cable well when the municipal 10KV cable enters the factory area?

Answer: No cable wells are required for cables with 6 or fewer cables. There are many wells for cables, which is convenient for the replacement and addition of cables. There is no need to set up a cable well when the municipal 10KV cable enters the factory area, it can be directly buried from the terminal rod to the high-voltage power distribution cabinet.

Question 3

How to lay temporary cables on site?

Supplementary questions: The unit building a new factory building, and the construction transformer and high-voltage lines are far from the construction center. Since it is a steel structure factory building, overhead lines cannot be used to avoid conflicts with the steel structure installation. Only low-voltage cables can be used to lead from the transformer to the construction site. It is distributed to the second-level distribution box of each construction unit on site. How should the low-voltage cable be laid in this section? Buried directly or placed directly on the ground?

Answer: Cable exporter china Shenghua reminds us that it is strictly forbidden to lay directly on the ground. This low-voltage cable is directly buried.

What should I pay attention to when laying pipes?

Under what circumstances is it used?

Cable laying through pipes, cable exporter china Shenghua believes that compared with direct burial, it is more convenient for later maintenance and additional lines. For cables laid through pipes, some spare pipes can be considered to prepare for future line maintenance and capacity expansion.

1. When laying through pipes, it is necessary to consider setting up cable wells when the turning angle of the line is large or the distance of the straight section is long.

2. When the number of cables is small and the wire diameter is small, the cable hand well can be used;

3. When there are many cables and the wire diameter is large, it is necessary to consider setting up a cable manhole. The cable well can be done according to the Atlas practice. In addition to the atlas method, many small passage wells can also be directly bricked or poured with concrete. At this time, it is necessary to consider setting water seepage holes at the bottom.

4. There are many pipes that pass through the pipes, such as cast iron pipes, steel pipes, polyethylene pipes, nylon pipes, carbon pipes, etc., which can be selected according to needs. Pay attention to the influence of eddy current when the single-core cable is passed through the metal tube.

The above are the points for attention when laying cables directly shared by cable exporter china Shenghua, if you are interested in this, please contact us to read more.