{
  "url": "https://openlegislation.uk/control-of-electromagnetic-fields-at-work-regulations-2016/schedule/part-2/chapter-1/paragraph-3",
  "json_url": "https://openlegislation.uk/control-of-electromagnetic-fields-at-work-regulations-2016/schedule/part-2/chapter-1/paragraph-3.json",
  "legislation": "uksi/2016/588",
  "legislation_title": "The Control of Electromagnetic Fields at Work Regulations 2016",
  "legislation_url": "https://openlegislation.uk/control-of-electromagnetic-fields-at-work-regulations-2016",
  "path": "schedule/part/2/chapter/1/paragraph/3",
  "kind": "paragraph",
  "number": "3",
  "heading": "Notes",
  "text": "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.\nTable AL2 – ALs for exposure to electromagnetic fields from 1 Hz to 10 MHz\nFrequency range\nMagnetic flux density Low ALs (B)[µT]\nMagnetic flux density High ALs (B)[µT]\nMagnetic flux density ALs for exposure of limbs to a localised magnetic field (B) [µT]\n1 ≤ f < 8 Hz\n2.0 × 105/f2\n3.0 × 105/f\n9.0 × 105/f\n8 ≤ f < 25 Hz\n2.5 × 104/f\n3.0 × 105/f\n9.0 × 105/f\n25 ≤ f < 300 Hz\n1.0 × 103\n3.0 × 105/f\n9.0 × 105/f\n300 Hz ≤ f < 3 kHz\n3.0 × 105/f\n3.0 × 105/f\n9.0 × 105/f\n3 kHz ≤ f ≤ 10 MHz\n1.0 × 102\n1.0 × 102\n3.0 × 102\nExposure levels not exceeding the ALs will be compliant with:\nAt and below 400 Hz: the sensory effect ELVs in Table ELV3\nThe health effect ELVs in Table ELV2\nAbove 400 Hz: the health effect ELVs in Table ELV2",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2016/588/schedule/part/2/chapter/1/paragraph/3",
    "retrieved_at": "2026-10-28T23:23:24.357811+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}