Table 16.4 - Electric field and magnetic field limits at power frequencies of 50 to 60 Hz
Source: Maddock, 1992
  | Occupational | Public | Status | Basis |
---|---|---|---|---|
Electric field limits (kV/m) (rms) | ||||
former Czechoslovakia | 15 | | S | P, H |
West Germany | 20.7 | 20.7 | S | J |
Poland | 20a, 15 | 10, 1e | S | P, H |
UK | 12.3b | 12.3b | G | I |
former USSR | 25 to 5c |   | S | J |
IRPA | 30 to 10d | 10f, 5g | G | P, H |
Magnetic-field limits (mT) (rms) | ||||
West Germany | 5 | 5 | S | J |
UK | 2h | 2h | G | I |
former USSR | 7.5 to 1.8i |   | G | W |
IRPA | 25i, 5k, 0.5l | 1f, 0.1g | G | J |
Notes: IRPA: International Radiation Protection Association
G | Guideline |
H | Health-concern for possible effects |
I | Basic restriction is induced current |
J | Basic restriction is of induced current density |
P | Perception of spark discharges or tingling sensations |
S | Standard, order or rule, usually with legal force |
W | these values seem to have been developed primarily for electric-arc welding |