Estimates of mean occupational magnetic field exposure for transmission workers
| Employment categories | Estimates of mean magnetic field exposures (μT)3-150 |
| All staff at transmission district offices which are distant from power lines | 0.0 |
| Clerical and engineering staff at transmission district offices which are close to power lines | 0.76 |
| Managers at transmission district offices which are close to power lines | 0.45 |
| Substation linesmen | 3.34 |
| Industrial staff at higher field substations (excluding linesmen) | 1.84 |
| Engineers at higher field substations | 1.51 |
| Industrial staff at lower field substations (excluding linesmen) | 1.41 |
| Engineers at lower field substations | 0.83 |
↵3-150 In excess of background exposure.