The usual way of expressing the field from a power line is to show how the field falls with distance. Sometimes it is more helpful to express the distance for the field to fall to a certain value of field. This table presents this information.
| Voltage |
Distance (m) for typical field to fall to: |
| 10 µT |
1 µT |
0.4 µT |
0.1 µT |
0.01 µT |
| 400/275 kV |
* |
30-40 |
50-60 |
90-110 |
200+ |
| 132 kV |
* |
0-10 |
10-30 |
30-60 |
90+ |
| 33/11 kV |
* |
0-5 |
0-20 |
10-40 |
50+ |
| 400 V |
* |
* |
* |
10 |
20+ |
* typical fields from this line do not reach this value anywhere