Derating Factors For Power & Control Cables
The basis of the standard conditions is the climatic conditions of the Power & Control Cables are based on the following assumption.
| Maximum conductor temperature for PVC Cables | -70°C |
| Maximum conductor temperature for HRPVC Cables | -85°C |
| Maximum conductor temperature for XLPE Cables | -90°C |
| Soil Thermal Resistivity | -150°C cm/W |
| PVC Thermal Resistivity | -650°C cm/W |
| XLPE Thermal Resistivity | -350°C cm/W |
| Ambient Air Temperature | -40°C |
| Ambient Ground Temperature | -30°C |
Cables laid in Direct Air
Rating Factor for variation in Depth of lying in Ground
