Ambient Temperature
The current-carrying capacities of cables in the air are based on an average air temperature equal to 30°C. For other temperatures, the correction factor is given in to table for PVC, EPR and XLPE insulation material.
| Temperature Correction Factor | ||||||||
|---|---|---|---|---|---|---|---|---|
| Air Temperature | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| Rating Factor(PVC) | 1.40 | 1.32 | 1.25 | 1.16 | 1.09 | 1.00 | 0.90 | 0.80 |
| Rating Factor(HRPVC) | 1.28 | 1.22 | 1.17 | 1.12 | 1.06 | 1.00 | 0.94 | 0.87 |
