These three marks represent different scopes of certification-
UL listed — The product has been fully tested and certified for direct end -use in the United States. It can be sold, installed and used as a finished product. This is the highest level of certification for finished cables.
cUL listed — The ”c” prefix means the product is also certified to the equivalent Canadian Standards Association (CSA) requirements, specifically CSA C22.2 No.49, which covers flexible cords and cables. A product marked ”cULus” is simultaneously approved for both USA and Canada.
UL Recognised — This applies to components (such as individual insulated conductors or raw materials) intended for use inside a larger certified assembly. Recognised components are not approved for direct end-use as standalone products. If you are buying cable to incorporate into a luminaire that will itself carry a UL listing, Recognised-level cable may suffice but for the cable itself to be sold independently in North America, UL Listed is required.
Particularly SPT-1, SPT-2 and SPT-3, For other product Codes, check with our team.