# The Control of Electromagnetic Fields at Work Regulations 2016, Paragraph 3: Notes

Extent: E+W+S

The ALs represent the maximum field values at any place where an employee 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, case by case.
Table AL2 – ALs for exposure to electromagnetic fields from 1 Hz to 10 MHz
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

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Source: https://www.legislation.gov.uk/uksi/2016/588/schedule/part/2/chapter/1/paragraph/3 (the official version)
Page: https://openlegislation.uk/control-of-electromagnetic-fields-at-work-regulations-2016/schedule/part-2/chapter-1/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.