What is listing?
Listing is the term generally applied to having a piece of equipment evaluated for safety by a responsible organization, like a NRTL. Traditionally, Underwriters Laboratories (UL) has dominated the US market, and the Canadian Standards Association (CSA) has dominated the Canadian market. Having a product listed will allow a manufacturer to apply an organization’s marking, such as the UL mark. Once this has been done, that organization will monitor the manufacturing facilities that produce the product to ensure the design does not change, and that certain production line tests are being conducted. Having a product listed can provide market access, as well as give a product a competitive edge. Most importantly, however, listing a product ensures (with the backing of an established organization) that the product should not present a safety hazard to the people who buy it.
