{
  "url": "https://openlegislation.uk/meters-certification-regulations-1990/schedule-1/paragraph-9",
  "json_url": "https://openlegislation.uk/meters-certification-regulations-1990/schedule-1/paragraph-9.json",
  "legislation": "uksi/1990/792",
  "legislation_title": "The Meters (Certification) Regulations 1990",
  "legislation_url": "https://openlegislation.uk/meters-certification-regulations-1990",
  "path": "schedule/1/paragraph/9",
  "kind": "paragraph",
  "number": "9",
  "heading": "Margins of error",
  "text": "(1) The maximum error permitted for both single phase and polyphase whole current and transformer operated meters, tested with transformers connected, shall not exceed plus or minus 1.5% for tests 1, 2, 3 and 4 given in Table 2.\n(2) The maximum error permitted for both single phase and polyphase transformer operated meters, tested without transformers connected, shall not exceed plus or minus 1.0% for tests 1, 2, 3 and 4 inclusive given in Table 2.\n(3) For polyphase whole current and transformer operated meters, tested with transformers connected, the maximum error shall not exceed plus 1.7% or minus 2.7% for tests 5 and 6 given in Table 2.\n(4) For polyphase transformer operated meters, tested without transformers connected, the maximum error shall not exceed plus 1.2% or minus 2.2% for tests 5 and 6 given in Table 2.\n(5) Where current and voltage transformers, which are intended to be used with meters, are not tested connected to a meter then the total error of the transformers at any load point throughout the rated range shall not exceed 0.5%; unless by matching transformers to meters enables the total error of meter and transformers to meet the requirements of paragraphs 9(1), 9(2), 9(3) and 9(4) above.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1990/792/schedule/1/paragraph/9",
    "retrieved_at": "2026-10-29T15:22:08.525435+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."
}