Cable Derating Factor Table As Per Iec | Works 100%

For XLPE (90°C max), at 40°C ambient: From Table B.52.13: $K_1 = 0.91$

| Insulation Type | Max Operating Temp | Ambient Temp (°C) | Derating Factor ($K_1$) | | :--- | :---: | :---: | :---: | | | 70°C (PVC) | 25 | 1.06 | | | | 30 (Ref) | 1.00 | | | | 35 | 0.94 | | | | 40 | 0.87 | | | | 45 | 0.79 | | | | 50 | 0.71 | | | | 55 | 0.61 | | XLPE / EPR | 90°C (XLPE) | 25 | 1.04 | | | | 30 (Ref) | 1.00 | | | | 35 | 0.96 | | | | 40 | 0.91 | | | | 45 | 0.87 | | | | 50 | 0.82 | | | | 55 | 0.76 | | | | 60 | 0.71 | cable derating factor table as per iec