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title: UL “Recognized,” “Listed,” and “Classified”
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Read how UL “Listed,” “Recognized,” and “Classified” vary in their separate approval and certification levels. ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­    ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­  

| View in browser UL “Recognized,” “Listed,” and “Classified” “Recognized” or “Listed”? The Underwriter’s Laboratories (UL) marks and acronyms are numerous. You find them on both components and complete products with various markings. Despite a nearly exhaustive list of marks, three commonly used North American markings are ordered from left to right in the table below. Note: in 1 and 3, the lead testing agencies are reversed. 1. Products: “Listed.” This category is tested by UL to meet U.S. and Canadian standards complete products.  2. Components: “Recognized.” A category tested by UL to meet standards for components only which can be sold in the U.S. and Canada.  3. Products: This category tested by CSA to meet U.S. and Canadian standards. Claim Your Free Chart: Major International Testing Agencies Access Now Globally, the above marks are a small sampling of markings denoting approvals found on country-specific components and cord sets determined by agencies worldwide. UL “listed” defines “complete” products—a cord set, a complete Accessory Power Strip (APS)—while “recognized” covers components of that cord set and APS.   An example of a recognized designation would be the components of Interpower’s APS. An APS has among other components at least one IEC 60320 inlet (C14) and multiple IEC outlets (Sheet Es/Sheet Fs, etc.). Those components must meet UL requirements (standards) to become recognized.   All the components having become “recognized,” the entire product can now be sent to UL for “listed” status to see if the entire APS as a finished standalone product successfully meets UL requirements for an accessory power strip. If it does, the APS will be certified as “listed.”   One upside for manufacturers making only a few components is the minimal time they will spend on sending submissions to UL—and the testing and approval process should be less expensive for recognized products since they are components. This does not factor in extremely rare metals which may drastically affect component cost outside of testing. Whether common alloy or rare metals, the UL recognized components are considered “safe” components which add to their value and marketability.   The UL Follow-Up Service requires manufacturers to report quarterly (in certain cases) as well as conducting tests and audits on approved or certified products on a regular schedule (often yearly or biannually) to ensure the approved products continue to meet specific standards. If a product carries a UL listed mark, it means it has met UL’s requirements for a complete product.   Classified UL “Classified” is a designation that uses different metrics—a Classified product isn’t as comprehensive as a UL Listed product. For example, if you have a UL Listed waterproof socket covering, the socket may be listed, but the UL Classified certification might read, “This socket has been evaluated to withstand high-pressure water jets from any direction.” In short, Classified almost always pertains to one main characteristic of your product. It’s also important not to assume a Classified product is UL Listed, though it may be. For that, you will need to read all of the fine print.   Get More From Interpower   Our goal is is to make it faster and easier for you to design and export your products.   If there is a particular topic you would like us to cover, simply reply to this email with your request. Interpower   100 Interpower Ave   Oskaloosa  IA   52577   United States Interpower Components Ltd.  10 Kelvin Drive  Knowlhill  Milton Keynes  Buckinghamshire  MK5 8NH  United Kingdom You received this email because you are subscribed to Interpower Connections Subscription from Interpower Update your email preferences to choose the types of emails you receive.  Unsubscribe from all future emails   © 2026 Interpower. All Rights Reserved. |
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