The Reason Why The Laying Method of THHN Sheathed Wire Cannot Be Directly Buried

THHN wire is a commonly used construction cable. However, many people are very curious about the laying method of thhn sheathed wires. One of them is really incomprehensible, because many people want to lay it directly in the soil, so whether this kind of thhn sheathed wires can be laid directly Buried? This is a question that everyone is most concerned about and wants to know. Today we will discuss this issue in detail.

What cables can be directly buried?

1. The buried cable should be armored cable with outer sheath. Where there is no mechanical damage, unarmored plastic sheathed cables can also be used. Steel wire armored cables should be used in quicksand and muddy areas and in potentially displaced soils.

2. In the soil subject to chemical corrosion or stray current corrosion, ordinary cables shall not be buried directly in the ground.

3. In the field, when the cable is to be directly buried under the soil, the depth of the ditch where the cable is directly buried shall not be less than 70 cm. The upper and lower sides of the cable shall be evenly laid with 1 meter thick fine sand or soft soil, and a concrete protection board or similar shall be used. protective floor covering. In cold regions, cables should be buried under frozen soil to prevent cable damage.

Can THHN sheathed wire be buried directly?

1. The THHN sheathed wire is made of solid polyvinyl chloride compound insulating plastic and has a layer of fully wrapped PVC sheath material on the outside for protection. This structure protects each wire from mechanical force and can only help prevent wire and cable damage due to moisture.

2. The PVC insulation material and nylon sheath of THHN sheathed wire have certain standards, and the chemical substances buried below should be prevented from causing corrosion.

3. THHN sheathed wires are pressure-resistant wires and cannot be buried directly below them to prevent the cables from being bitten by mice or other animals. However, this is not an armored cable and cannot withstand mechanical gravity.

4. THHN sheathed wires cannot be buried directly. Since the THHN only comes with an outer protection called a nylon sheath, the wires are easily damaged when buried. It may not be strong enough to overcome dry, wet or corrosive environments.

Therefore, the THHN sheathed wire cannot be directly buried in the soil. If it must be buried, it must be buried in a protective conduit when buried.

There are a number of reasons for not being able to bury your THHN. Here are some ideal reasons why you can't:

It uses a simple protection layer:

THHN jacketed wire uses a simple layer of protection. It is called a layer of PVC material with a layer of nylon sheath.

So this layer of protection is enough for basic everyday protection. But it can't protect the wire when buried in the ground, because it may be dry, and working under wet or corrosive mud may damage the wire.

XSD Cable Factory produces THHN sheathed wires, which can check the quality of the wires at any time, and at the same time avoid price increases due to secondary purchases. We export THHN sheathed wires in bulk to Philippines, North America and other regions. We have a clear understanding of local wire specifications and standard requirements, and provide customers with high-quality wires.