Power cords are wires that carry electrical current. Usually the way of current transmission is point-to-point transmission. Power cords can be divided into AC power cords and DC power cords according to their uses. Generally, AC power cords are wires that use alternating current with higher voltage. Due to the higher voltage, this type of wire requires unified standards and safety certification before it can be officially produced. DC lines basically pass direct current with lower voltage, so the safety requirements are not as strict as AC lines. However, for safety reasons, countries still require unified safety certification.
The structure of the power cord is not very complicated, but don't just see through it from the surface. If you study the power cord carefully, in some places you still need a professional to understand the structure of the power cord.
The structure of a power cord mainly includes an outer sheath, an inner sheath, and a conductor. Common transmission conductors include copper and aluminum wires.
The outer sheath is also called a protective sheath. It is the outermost sheath of the power cord. This outer sheath plays the role of protecting the power cord. The outer sheath has strong characteristics, such as high temperature resistance, low temperature resistance, It has the characteristics of resistance to natural light interference, good winding performance, long service life, and environmentally friendly materials.
The inner sheath, also known as the insulating sheath, is an indispensable middle structural part of the power cord. The main purpose of the insulating sheath, as the name suggests, is insulation, ensuring the safety of the power cord and preventing any leakage between the copper wire and the air. phenomenon, and the material of the insulating sheath should be soft to ensure that it can be well embedded in the middle layer.
Copper wire is the core part of the power cord. Copper wire is mainly the carrier of current and voltage. The density of copper wire directly affects the quality of the power cord. The material of the power cord is also an important factor in quality control, and the quantity and flexibility of the copper wire are also factors considered.
The inner sheath is a layer of material that wraps the cable between the shielding layer and the core. It is usually made of polyvinyl chloride plastic or polyethylene plastic. There are also low smoke halogen-free materials. Use it in accordance with the process regulations so that the insulation layer does not come into contact with water, air or other objects, and the insulation layer is protected from moisture and mechanical damage.