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3. The ALs represent the maximum field values at any place where a worker may be working, before the entry of any person into the field. In the case of an electromagnetic field source in the immediate vicinity of the body, compliance with the ELVs must be determined dosimetrically on a case by case basis.U.K.
Table AL2 – ALs for exposure to electromagnetic fields from 1 Hz to 10MHz
| Frequency Range | Magnetic flux density Low ALs (B) [µT] | Magnetic flux density High ALs (B) [µT] | Magnetic flux density ALs for exposure of limbs to a localised magnetic field (B) [µT] |
|---|---|---|---|
| 1 ≤ f < 8 Hz | 2.0 × 105/f2 | 3.0 × 105/f | 9.0 × 105/f |
| 8 ≤ f < 25 Hz | 2.5 × 104/f | 3.0 × 105/f | 9.0 × 105/f |
| 25 ≤ f < 300 Hz | 1.0 × 103 | 3.0 × 105/f | 9.0 × 105/f |
| 300 Hz ≤ f < 3 kHz | 3.0 × 105/f | 3.0 × 105/f | 9.0 × 105/f |
| 3 kHz ≤ f ≤ 10 MHz | 1.0 × 102 | 1.0 × 102 | 3.0 × 102 |
| Exposure levels not exceeding the ALs will be compliant with: | At and below 400 Hz: the sensory effect ELVs in Table ELV3 | The health effect ELVs in Table ELV2 | |
| Above 400 Hz: the health effect ELVs in Table ELV2 | |||
NOTES