{"id":12716,"date":"2024-03-19T18:32:25","date_gmt":"2024-03-19T17:32:25","guid":{"rendered":"https:\/\/b3v39j.myrdbx.io\/ul-wissen\/ul-wiki\/nrtl\/"},"modified":"2026-07-31T19:57:29","modified_gmt":"2026-07-31T17:57:29","slug":"nrtl","status":"publish","type":"wiki","link":"https:\/\/krayer.de\/en\/ul-wissen\/ul-wiki\/nrtl\/","title":{"rendered":"NRTL"},"content":{"rendered":"\n

A Nationally Recognized Testing Laboratory ( NRTL<\/strong>) is a government-recognized, private testing laboratory in the United States that certifies products according to its own standards.<\/p>\n\n

Relation to UL<\/h2>\n\n

In choosing UL, we have opted for what is arguably the most meticulous NRTL. The high quality of UL\u2019s standards, tests, and audits aligns with our quality standards. <\/p>\n\n

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NRTLs and Occupational Safety in the United States<\/h2>\n\n

Under federal law, ensuring workplace safety in the United States is the responsibility of the Occupational Safety and Health Administration<\/strong> (OSHA<\/a>). It issues relevant regulations for this purpose. Monitoring compliance with these regulations, in turn, is the responsibility of local authorities, the Authorities Having Jurisdiction<\/strong><\/a> (AHJ) or their inspectors. Before a machine or piece of equipment can be put into operation in the United States, it must be approved by an AHJ inspector. <\/p>\n\n

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\"Ray,<\/div><\/div><\/p>\n\n

NRTLs are accredited testing laboratories<\/h3>\n\n

Many of these inspectors rely on the presence of a certification seal<\/strong> when inspecting the facility. However, these seals are not issued by OSHA<\/a> itself, but by private companies<\/strong>. In theory, any private organization may issue its own labels; in practice, however, only NRTL certifications <\/strong>are recognized by <\/strong>inspectors. But what distinguishes a Nationally Recognized Testing Laboratory from other companies? <\/p>\n\n

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How does a testing laboratory become an NRTL?<\/h3>\n\n

All private testing laboratories in the United States operate according to their own standards. To obtain a certification mark<\/strong>\u2014as the test mark is also known\u2014the tested product must comply with the standards<\/strong> specified therein. To ensure the quality of testing laboratories and their standards, OSHA launched the NRTL program<\/strong> in 1988. Laboratories whose standards are at least as stringent as the legal requirements can receive federal recognition following a thorough review. <\/p>\n\n

In short, an NRTL certification mark means that the labeled product meets at least the legal requirements for workplace safety. The declaration of conformity<\/strong> issued by the manufacturer, which is standard in the EU, has no meaning in North America. Anyone seeking market access to North America should therefore not forego NRTL certification. <\/p>\n\n

In which fields do NRTLs operate?<\/h2>\n\n

Not every NRTL operates in every field or is certified<\/strong> for every field. While some laboratories focus on specific sectors, such as aerospace or healthcare, others operate in nearly all sectors. In the field of electrical safety<\/strong> and fire protection<\/strong>, UL<\/strong><\/a> be considered the leading NRTL. UL\u2019s influence is such that some UL standards even form the basis for legal regulations. <\/p>\n\n

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