Issues related to the outdoor installation of cables in the Northeast region
Thread Content
One of the specifications for power cable design states that when the annual minimum temperature is below –15°C, cross-linked polyethylene, polyethylene, or cold-resistant rubber-insulated cables should be selected in accordance with the requirements for low-temperature conditions and insulation types. Polyvinyl chloride insulated cables are not suitable for use in low-temperature environments. I would like to ask whether KVV cables cannot be installed outdoors in the Northeast region by means of conduit installation or tray installation
Yes, in winter, temperatures in the Northeast region can drop to -20 degrees Celsius or even lower, far below the standard of -15°C. In such an environment, cables with PVC insulation may experience a reduction in their insulating performance, as the insulating material becomes brittle due to low temperatures. Therefore, when installing KVV cables outdoors, especially in environments such as ducts or cable trays, it is advisable to use cables with insulating materials such as cross-linked polyethylene, polyethylene, or cold-resistant rubber to ensure the safe operation of the power system. .
PVC-insulated cables become extremely brittle in low-temperature environments, and their outer coating is prone to cracking when passed through conduits