{
  "code": "ul-listed",
  "mark": "UL",
  "name": "UL mark (UL Listed / Recognized)",
  "summary": "A third-party safety certification mark for North America. Legally voluntary, but insurers, inspectors, fire authorities and distribution channels widely require NRTL certification, which makes it close to necessary in practice. cUL / cULus covers Canada.",
  "obligation": "自愿",
  "scheme_type": "第三方认证",
  "region": "北美",
  "issuer": "UL Solutions, one of the OSHA-recognised NRTLs",
  "requirements": "Test the complete product or component against the applicable UL standard, pass the initial factory inspection and accept periodic Follow-Up Service inspections.",
  "usage_rules": "The mark distinguishes Listed (end product) from Recognized Component; the two are not interchangeable and must be shown with the control number.",
  "validity": "Certification is maintained through follow-up inspections; standard revisions or design changes require a change assessment.",
  "markets": [
    {
      "iso": "CA",
      "name": "Canada"
    },
    {
      "iso": "US",
      "name": "United States"
    }
  ],
  "regulations": [
    {
      "ref_no": "UL 1973:2022",
      "slug": "ul-1973"
    },
    {
      "ref_no": "UL 2743:2025",
      "slug": "ul-2743"
    },
    {
      "ref_no": "UL 9540:2023",
      "slug": "ul-9540"
    }
  ],
  "products": [
    {
      "code": "ESS",
      "name": "Storage systems & PCS"
    },
    {
      "code": "EVSE",
      "name": "EV charging equipment"
    },
    {
      "code": "LIB",
      "name": "Batteries & cells"
    },
    {
      "code": "PPS",
      "name": "Portable power stations"
    }
  ],
  "source_url": "https://www.osha.gov/nationally-recognized-testing-laboratory-program/ul",
  "verified_at": "2026-08-19",
  "version": 1,
  "urls": {
    "html": "/en/certifications/ul-listed",
    "markdown": "/en/certifications/ul-listed.md"
  }
}