U.L. vs. CSA Listings

U.L. stands for Underwriters Laboratory. U.L. is an NRTL (Nationally Recognized Testing Laboratory) and SDO (Standards Development Organization) that can test for both the United States and Canadian standards of equipment safety.

CSA stands for Canadian Standards Association Group now knows as CSA Group. CSA is an NRTL (Nationally Recognized Testing Laboratory) and SDO (Standards Development Organization) that can test for both the United States and Canadian standards of equipment safety.

Both U.L. and CSA have the capabilities to test product safety to both the United States and Canadian standards. U.L. and CSA test to the same standards for each market. There is no legal requirement in either the U.S. or Canada for standards to be tested by only one agency although customers may have preferences.

Product is tested by UL and meets UL Standards of Safety for the U.S.

Product is tested by UL to meet U.S. and Canadian Standards.

Product is tested by U.L. to meet Canadian Standards.

Product is tested by CSA and meets Canada Standards.

Product is tested by CSA to meet U.S. and Canadian Standards.

Product is tested by CSA to meet U.S. Standards.

Product is tested by CSA as a component only to meet U.S. and Canadian Standards.

In conclusion, both U.L. and CSA tests and certifies products to verify they meet applicable standards written by ANSI, ASTM, ASME, U.L., CSA and other standards organizations.