The polyvinyl chloride (PVC) plastic used in polyvinyl chloride insulated cables is made of polyvinyl chloride resin as the main raw material, and various additives are added according to the different use requirements of various cables, such as plasticizers, stabilizers, fillers, etc. . , through mixing, plasticizing and granulating. PVC plastic has excellent mechanical properties, good chemical resistance, weather resistance and aging properties, does not delay combustion, has certain electrical insulation properties and good processing properties, and is low cost, so it is widely used as cable insulation and sheathing Material. Today we will share with you how to choose PVC insulated cables.
1. Look at the packaging. Regular PVC insulated cable packaging will have the manufacturer, address, inspection seal and production date of the PVC wire printed on it. If not, most are inferior products.
2. Look at the steel wire skin. Check whether there is trademark, specification, voltage and other parameter information printed on the surface of the circuit. If not, most are inferior products. Check whether the thread color is bright and shiny. If the outer skin of the wire is dull and dull, the material of the wire sheath is recycled, which will affect the service life of the PVC cable. Check whether the thickness of the thread is even. Otherwise, the thinner areas can be easily penetrated by electricity, which may result in electric shock or fire.
three. Look at the copper core. Look at the color and gloss of the cable’s copper core cross-section. The high-quality copper core has bright and soft color, yellow to medium red, high conductivity and long service life. Inferior copper cores are white with yellow, have low conductivity, and have a relatively short service life. Look at the thickness of the copper core. High-quality wires have a copper core thickness close to the nominal cross-section and a centered core. The thicker the copper core, the higher the conductivity and the better the product quality.
Four. Touch PVC insulated cable. Take a PVC insulated cable and bend it repeatedly with your hands. PVC materials that are soft to the touch, have good fatigue resistance, have soft plastic or rubber feel, and have no cracks in the wire insulator are preferred. On the contrary, it is made of inferior PVC material, and wires made of inferior PVC material have safety risks such as fire and leakage.