A power cord is a wire that carries current. The usual way electricity is transmitted is point to point. The power line can be divided into AC power line and DC power line according to the use of AC power line, usually AC power line is through the high voltage AC wire, this kind of wire because of the high voltage needs a unified standard to obtain safety certification side can be formally produced. The DC line is basically through the low voltage direct current, so the safety requirements are not as strict as the AC line, but for the sake of safety, all countries still require unified safety certification.
The structure of the power cord is not very complex, but it is not easy to see through it all at once from the surface. If you study the power cord well, some places still need a professional to understand the structure of the power cord.
The structure of the power line is mainly outer sheath, inner sheath and conductor. The common transmission conductor is copper and aluminum metal wire.
The outer sheath, also known as the protective sheath, is the outermost layer of sheath of the power line. This layer of outer sheath plays the role of protecting the power line. The outer sheath has strong characteristics, such as high temperature resistance, low temperature resistance, anti-natural light interference, good winding performance, high service life, environmental protection of materials and other characteristics.
Within the sheath
The inner sheath, also known as the insulation sheath, is an indispensable part of the middle structure of the power line. The main use of the insulation sheath is insulation, as the name implies, to ensure the safety of the power line, so that there will be no leakage between the copper wire and the air, and the material of the insulation sheath should be soft to ensure that it can be well inset in the middle layer.
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
Inner sheath is a layer of material that wraps the cable between the shielding layer and the wire core. It is usually PVC plastic or polyethylene plastic. There are also low smoke halogen-free ingredients. Use in accordance with the process regulations, so that the insulation layer will not contact with water, air or other objects, to avoid the insulation damp and insulation layer from mechanical damage.