YJV and VV are two cables with different insulation materials. General indoor permanent projects tend to choose YJV cables. VV cables are generally used in low-voltage systems, while YJV cables are mostly used in high-voltage systems. YJV cables are better than VV cables in terms of temperature resistance, voltage resistance and corrosion resistance. It's just that the price is more expensive. YJV—Copper core XLPE insulated and PVC sheathed power cable. VV—Copper core PVC insulated and sheathed power cable. YJV—Voltage level (K V) 6～500, maximum allowable working temperature 90℃. VV—Voltage level (K V) 1～6, the maximum allowable working temperature is 65～70℃.
VV cables are PVC insulated and sheathed and made of thermoplastic materials. YJV cables are cross-linked PVC insulated and sheathed with thermoplastic materials. Because of the different materials, the maximum allowable long-term working temperature of VV and YJV cables are different. 1. The maximum rated temperature of VV cable (VLV) cable conductors is 70 ℃, and the maximum temperature does not exceed when short-circuit (duration less than 5 seconds) 160 degrees Celsius. 2. The maximum rated temperature of YJV cable (YJLV) cable conductors is 90℃, and the maximum temperature does not exceed 250 ℃. when short-circuited (the duration is less than 5 seconds). Therefore, the current carrying capacity of the two cables is different, and the YJV cable is larger.