How should the pipe remove the debris and water before passing the wire?
BVV line refers to the copper core plastic sheath line; BV line refers to the copper core PVC insulated wire
It should be YJV cable. YJV: XLPE insulated PVC sheathed power cable VLV: PVC sheathed polyethylene insulated aluminum core power cable
First, the naming of the product is different, the meaning of the difference is different: YJV insulation is the use of cross-linked polyethylene .VV insulation is the use of polyvinyl chloride.Second, the two in the production equipment and process manufacturing are also different: VV Plastic cable, YJV that cross-linked cable, the insulation performance is better than plastic cable. YJV only made a cross-linking treatment on the insulating material to improve the heat-resistant temperature, while VV did not. YJV cable operating temperature of 90 degrees, while the VV is only 70 degrees, with the cross-sectional area YJV cable carrying capacity. VV class cable conductor running the maximum rated temperature of 70 degrees Celsius, short circuit (duration less than 5 seconds) the maximum temperature does not exceed 160 degrees Celsius. YJV class cable conductor running the maximum rated temperature of 90 degrees Celsius, short circuit (duration less than 5 seconds) the maximum temperature does not exceed 250 degrees Celsius. YJV is better than VV in the long run (long life), but more expensive than VV. From the maximum allowable short circuit to see: YJV is 250 degrees, VV is .140. From the technical and economic indicators, the three-core YJV VV cable than the parameters are high. In the civil construction recommended YJV, its carrying capacity than VV large, more important is the electrical fire, because of its insulating material does not contain chlorine, combustion will not produce toxic gases. So that VV environmental performance is poor. In the civilian, nuclear and other fields VV has been basically replaced by YJV, but in many industrial enterprises, VV application is still very wide, because it is cheap. Through the above understanding, I believe we YJV (cable) and VV (cable) have a certain understanding, if they later purchase a similar cable when there will be a more accurate reference.
