UL is an abbreviation of Underwriter Laboratories Inc. UL can also be a symbol of the company and safety regulations. UL safety test is the most authoritative in the United States, but also in the world engaged in safety testing and identification of large private sector. It is an independent, not-for-profit, professional agency that tests public safety. It adopts scientific testing methods to study and determine the extent to which all kinds of materials, devices, products, equipment, buildings and the like are harmless and hazardous to life and property; to identify, compile and issue corresponding standards and to help reduce and prevent the loss of life The property suffered the loss of information, at the same time to carry out fact research business. It is mainly engaged in product safety certification and business safety certification business, the ultimate goal is to have the market access to a considerable level of safety of goods, to contribute to the health and property safety assurance.
       CUL is a CSA (Canada) certification based on the UL, which gives you the common safety certification mark for the United States and Canada.