The buried depth requirements of electrical conduits vary according to different application scenarios and regulations. In general, the buried depth of electrical conduits is required to be more than 50cm, but the specific requirements need to be determined according to factors such as the type of underground pipelines and the voltage of cables.
The significance of the buried depth of electrical conduits
Electrical conduits are a way to protect cables. By placing cables in conduits, the cables are protected from external forces, exposure to sunlight and rain, and other factors. At the same time, the fire resistance of the cables can be improved. The buried depth of electrical conduits is directly related to the safety of the cables and the quality of the buried conduit project, so it must be taken seriously. As a professional pipeline solution provider, Puhui can provide you with high-quality PVC and HDPE conduits.
How deep does electrical conduit need to be buried
In general, the buried depth of electrical conduits is required to be more than 50cm. However, the specific requirements also need to be determined according to the following factors: the type of underground pipelines, the voltage of cables, etc. For example, for cables along traffic arteries such as roads and railways, protective measures should be set up in accordance with the requirements of relevant regulations; for areas where disasters such as fires often occur, the buried depth of electrical conduits is required to be higher.
The buried depth requirements of electrical conduits vary according to different regional application scenarios and regulations. Take China as an example
1. For frozen soil areas, such as the periphery of Beijing, the frozen soil depth is 700mm, so the design requires a buried depth of 800mm, that is, below the frozen soil layer.
2. The wall thickness of cable conduits buried indoors and outdoors shall not be less than 2mm, and the buried depth shall not be less than 0.7m.
3. For cable conduits buried outdoors, the wall thickness shall be greater than 2mm, and the buried depth shall meet the design requirements, especially in frozen soil areas, it is necessary to ensure that the conduit is below the frozen soil layer.
4. The surface buried depth of the concealed conduit shall not be less than 15mm from the surface of the building or structure. If the insulating conduit is buried in a groove on the brick wall, cement mortar with a strength grade of not less than M10 shall also be used for surface protection.
5. For the buried depth of the cable, it is generally not less than 700mm in the station and not less than 1200mm in the interval.
Factors affecting the buried depth of electrical conduits and their solutions
1. Geological conditions
Geological conditions are one of the main factors affecting the buried depth of electrical conduits. In areas with good geological conditions, the buried depth of electrical conduits can be appropriately shallow; while in areas with poor geological conditions, the buried depth of electrical conduits should be deepened. The solution is to understand the geological conditions through exploration work in order to formulate a reasonable cable laying plan.
2. Environmental conditions
Environmental conditions are also one of the important factors affecting the buried depth of electrical conduits, mainly including temperature, humidity, salinity, etc. In an environment with high temperature, high humidity, and high salinity, the buried depth of electrical conduits should be appropriately deepened. At the same time, better anti-corrosion measures should be taken to protect cables and conduits from environmental damage.
3. Laying requirements
The larger the conductor of the cable, the greater the distance required between the two cables, which leads to an increase in the buried depth of the electrical conduit. Therefore, when designing the installation plan, factors such as the voltage level and conductor specifications of the cable should be considered to determine a reasonable buried depth of the electrical conduit.
The buried depth of electrical conduits is an essential step in electrical installation projects. A reasonable cable laying plan should be formulated in accordance with relevant regulations, and the buried depth should be determined in combination with geological and environmental conditions. At the same time, for cables of different specifications and geological and environmental factors, we should select corresponding anti-corrosion measures to protect cables and conduits.
