{
  "url": "https://openlegislation.uk/meters-certification-regulations-northern-ireland-1998/schedule-1/paragraph-9",
  "json_url": "https://openlegislation.uk/meters-certification-regulations-northern-ireland-1998/schedule-1/paragraph-9.json",
  "legislation": "nisr/1998/444",
  "legislation_title": "Meters (Certification) Regulations (Northern Ireland) 1998",
  "legislation_url": "https://openlegislation.uk/meters-certification-regulations-northern-ireland-1998",
  "path": "schedule/1/paragraph/9",
  "kind": "paragraph",
  "number": "9",
  "heading": "Margins of Error",
  "text": "(1) The maximum error permitted for—\n(a) single phase and polyphase whole current meters; and\n(b) single phase and polyphase transformer operated meters when tested with transformers connected\nshall not exceed plus or minus 1.5% for tests numbers 1, 2, 3 and 4 given in Table 2.\n(2) The maximum error permitted for both single phase and polyphase transformer operated meters, when tested without transformers connected, shall not exceed plus or minus 1.0% for tests numbers 1, 2, 3 and 4 given in Table 2.\n(3) The maximum error permitted for polyphase whole current and transformer operated meters, when tested with transformers connected, shall not exceed plus 1.7% or minus 2.7% for tests 5 and 6 given in Table 2.\n(4) The maximum error permitted for polyphase transformer operated meters, when tested without transformers connected, shall not exceed plus 1.2% or minus 2.2% for test numbers 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%.",
  "extent": "N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "I",
      "label": "I1",
      "text": "Sch. 1 para. 9 in operation at 1.2.1999, see reg. 1"
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/1998/444/schedule/1/paragraph/9",
    "retrieved_at": "2026-10-29T02:21:52.995521+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."
}