AS/NZS 3008.1.1:2025
Table 3.44, 3.45
Correction factors for ambient air and soil temperature
The cable size, correction factors and DC cable size tools read the ambient correction factor here. Table 3.44 gives the air factor and Table 3.45 the soil factor. Several factors differ from 2017.
Verified: read against the printed standard, pages 84–85. Checked 27 Sept 2026.
Units: Temp °C
These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.
41 rows
| Insulation | Medium | Conductor temp C | Temp (°C) | Factor |
|---|---|---|---|---|
| PVC | air | 75 | 15 | 1.31 |
| PVC | air | 75 | 20 | 1.25 |
| PVC | air | 75 | 25 | 1.2 |
| PVC | air | 75 | 30 | 1.13 |
| PVC | air | 75 | 35 | 1.07 |
| PVC | air | 75 | 40 | 1 |
| PVC | air | 75 | 45 | 0.93 |
| PVC | air | 75 | 50 | 0.85 |
| PVC | air | 75 | 55 | 0.76 |
| PVC | air | 75 | 60 | 0.65 |
| PVC | air | 75 | 65 | 0.53 |
| PVC | air | 75 | 70 | 0.38 |
| XLPE | air | 90 | 15 | 1.22 |
| XLPE | air | 90 | 20 | 1.18 |
| XLPE | air | 90 | 25 | 1.14 |
| XLPE | air | 90 | 30 | 1.1 |
| XLPE | air | 90 | 35 | 1.05 |
| XLPE | air | 90 | 40 | 1 |
| XLPE | air | 90 | 45 | 0.95 |
| XLPE | air | 90 | 50 | 0.89 |
| XLPE | air | 90 | 55 | 0.84 |
| XLPE | air | 90 | 60 | 0.77 |
| XLPE | air | 90 | 65 | 0.71 |
| XLPE | air | 90 | 70 | 0.63 |
| XLPE | air | 90 | 75 | 0.55 |
| XLPE | air | 90 | 80 | 0.45 |
| XLPE | air | 90 | 85 | 0.32 |
| PVC | soil | 75 | 10 | 1.14 |
| PVC | soil | 75 | 15 | 1.1 |
| PVC | soil | 75 | 20 | 1.05 |
| PVC | soil | 75 | 25 | 1 |
| PVC | soil | 75 | 30 | 0.95 |
| PVC | soil | 75 | 35 | 0.89 |
| PVC | soil | 75 | 40 | 0.84 |
| XLPE | soil | 90 | 10 | 1.11 |
| XLPE | soil | 90 | 15 | 1.07 |
| XLPE | soil | 90 | 20 | 1.04 |
| XLPE | soil | 90 | 25 | 1 |
| XLPE | soil | 90 | 30 | 0.96 |
| XLPE | soil | 90 | 35 | 0.92 |
| XLPE | soil | 90 | 40 | 0.88 |