Rating Factors for variation in Ground temperature for Cables Laid Direct In Ground or In Ducts
| Ground Temperature °C |
15 |
20 |
25
|
30
|
35 |
40 |
45
|
50
|
| XLPE insulated cable 90oC |
1.04 |
1.0 |
0.96 |
0.93 |
0.89 |
0.85 |
0.80 |
0.76 |
| PVC insulated cable 85oC |
1.04 |
1.0 |
0.96 |
0.92 |
0.88 |
0.83 |
0.78 |
0.73 |
| PVC insulated cable 70oC |
1.05 |
1.0 |
0.95 |
0.89 |
0.84 |
0.77 |
0.71 |
0.63 |