In Ampacity of a Conductor, temperature determines the ampacity of a conductor.
The ampacity of an electrical cable changes with changing ambient temperature.
Correction factors are used in this process to get fresh ratings for a conductor of such condition.
For cables, that have insulation is rated at 90° C, the following approximative ampacity correction factors apply under various ambient temperature conditions:
| Ambient Temperature | Correction Factors for Insulation of Cable Rated At: |
|---|---|
| (°C) | 90°C |
| 10 | 1.26 |
| 20 | 1.18 |
| 30 | 1.1 |
| 40 | 1 |
| 50 | 0.9 |
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