PVC Insulated Building Wire

YJV cables and VV cables are basically the same in function, but their differences are also obvious. There are three main ones: 1. Different names of products have different meanings: YJV cable insulation uses cross-linked polyethylene, and VV cable insulation uses polyvinyl chloride. 2. The two lines also have differences in production equipment and process manufacturing: VV is plastic cable, YJV is cross-linked cable, and its insulation layer performance is better than plastic cable. YJV only performs cross-linking treatment on the insulating material to increase the heat resistance temperature, but VV does not. The working temperature of YJV cable reaches 90 degrees, while VV is only 70 degrees. YJV cable with the same cross-sectional area has a large carrying capacity. The maximum rated operating temperature of VV cable conductors is 70 degrees Celsius, and the maximum temperature during short circuit (duration less than 5 seconds) does not exceed 160 degrees Celsius. The maximum rated operating temperature of YJV cable conductors is 90 degrees Celsius, and the maximum temperature during short circuit (duration less than 5 seconds) does not exceed 250 degrees Celsius. YJV is better than VV in the long run (longer service life, etc.), but it is more expensive than VV. From the perspective of the maximum allowable short circuit height: YJV is 250 degrees, VV is 160, 140 degrees. The application environment of YJV is worse than VV in terms of waterproofing. If it is laid underground, VV cable should be used. When using YJV, it is necessary to ensure that the cable is not soaked in water, that is, to ensure that the cable trench (well) has good drainage. If the cable tray is laid, YJV is selected. From the perspective of technical and economic indicators, the three-core YJV cable has higher parameters than the VV cable. It is recommended to use YJV in civil buildings. Its carrying capacity is larger than that of VV. More importantly, in the event of an electrical fire, because its insulation material does not contain chlorine, it will not produce toxic gases when burned. So that means VV’s environmental performance is worse. In civil, nuclear power and other fields, VV has been basically replaced by YJV. However, in many industrial enterprises, VV is still widely used because of its low price. Because YJV cable is better than VV cable in terms of cost performance, YJV cable has a tendency to replace VV cable.