NRTLs rhymes with Turtles

Who or what are NRTLs and why should we care?

Well the Nationally Recognized Testing Laboratory (NRTL)1 Program is a managed by the Occupational Safety & Health Administration (OSHA)2. OSHA was created in 1970 by Congress with the mission of overseeing working conditions and training in the United States. The majority of OSHA’s regulations fall into the category of general requirements, so when it came to specific products, rather than regulate them directly, they decided to create the NRTL Program.

Under this program, OSHA approves private sector organizations to performs product certification. Underwriters Laboratories (UL) is just one of these OSHA approved NRTLs. There are many others, each with their own range (or scope) of products that they have been authorized to oversee. Depending on the product category, there may be multiple companies with overlapping scopes of approval, meaning you may have more options than just UL.

Once a product has been certified, the NRTL authorizes the manufacturer to use their registered certification mark on the product. While each NRTLs mark is unique, they are all registered with OSHA. As a result their presence signifies compliance with appropriate safety standards.

So why should you care…well, because it means that there are usually more than one compliance company in the game. Sure UL is the biggest but there are plenty of other, sometimes better, options out there worth exploring. Take a look at the list below to see some of the options available.

The following organizations are currently recognized by OSHA as NRTLs:


1 I’m not entirely sure other people pronounce it this way, but it’s more fun so I’m going with it [return]
2 Sorry, compliance agencies love acronyms like ducks love water [return]


  1. Three Quick Facts: UL 969 Labels - UL Label Guy - June 10, 2014

    […] UL 969 labels are for more than just UL tested products. Testing companies such as ETL, IAPMO, and TUV require labels that meet the standard as well. [ed. Learn more about these agencies in my post: NRTLs rhymes with Turtles] […]