Nationally Recognized Testing Laboratories (NRTLs)

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The official source for NRTLs recognized by OSHA in the US is the Occupational Safety and Health Administration's (OSHA) Nationally Recognized Testing Laboratory (NRTL) Program: https://www.osha.gov/nationally-recognized-testing-laboratory-program

This website offers:

• Current List of NRTLs: This list includes contact information and the scope of recognition (the specific product types they can certify) for each NRTL.
• Downloadable List: You can download a printable version of the current NRTL list for your reference.

While there's no single global authority for NRTLs, here are some resources to find them in other countries:

• International Accreditation Forum (IAF): https://iaf.nu/en/accreditation-bodies/ - This organization promotes international harmonization of accreditation practices. Their website might have resources to find accredited certification bodies in various countries.
• National Accreditation Bodies: Many countries have their own national accreditation bodies overseeing certification programs. Searching for the national accreditation body of a specific country might lead you to a list of recognized testing laboratories.

Additional Tips:

• Product Manufacturer Website: Often, manufacturers list the NRTLs that have certified their products.
• Local Testing Laboratories: Contacting a local testing laboratory might provide information on recognized NRTLs in your region.
• Online Directories: Some online directories list accredited certification bodies worldwide. Be cautious about these directories and verify information with official sources.