Industry Information

Structure of power cables


The structure of the power cable is not very complex, but do not simply see through it from the surface. If you study the power cable well, some places still need to understand the structure of the power cable professionally.  

The structure of power cable mainly consists of outer sheath, inner sheath and conductor. The common transmission conductor is copper and aluminum wire.  

Outer sheath  

The outer sheath is also called the protective sheath, is the outermost layer of the power cord sheath, the outer sheath plays the role of protecting the power cord, the outer sheath has strong characteristics, such as high temperature resistance, low temperature resistance, natural light interference, winding performance is good, long service life, material environmental protection and other characteristics.  

Within the sheath  

The inner sheath is also called the insulation sheath, is an indispensable part of the middle structure of the power line, the main use of the insulation sheath as the name implies is insulation, to ensure the safety of the power line, so that there will be no leakage phenomenon between the copper wire and air, and the material of the insulation sheath should be soft, to ensure that it can be very good in the middle layer.  

Copper wire  

Copper wire is the core part of the power line, copper wire is mainly the carrier of current and voltage, the density of copper wire directly affects the quality of the power line.  The material of the power cord is also an important factor in quality control, as is the quantity and flexibility of the copper wire. 

Within the sheath  

The inner sheath is a layer of material that wraps the cable between the shielding layer and the wire core, generally polyvinyl chloride plastic or polyethylene plastic.  There are also low smoke halogen free materials.  Use in accordance with the process regulations, so that the insulation layer will not contact with water, air or other objects, to avoid moisture and insulation layer from mechanical damage.