What is UL certification

UL is short for Underwriter Laboratories Inc .. The UL Safety Testing Institute is the most authoritative in the United States and a larger private institution engaged in safety testing and identification in the world. It is an independent, non-profit, professional institution that conducts tests for public safety. It uses scientific testing methods to study and determine whether various materials, devices, products, equipment, buildings, etc. are harmful to life and property; determine, write, and issue corresponding standards and help reduce and prevent life. At the same time, information on the loss of property is carried out, and the fact-finding business is carried out. In short, it is mainly engaged in product safety certification and business safety certification business, and its ultimate purpose is to provide the market with a fairly safe level of commodities, and to contribute to the guarantee of personal health and property safety. In terms of product safety certification as an effective means to eliminate technical barriers to international trade, UL also plays an active role in promoting the development of international trade.

The UL standard is a constantly improving document. The requirements for the revision of the UL standard are proposed by people in industry, users, UL engineers, or other interested parties. Industry modification procedures: When it is necessary to modify certain contents of the UL standard, the requirements for the products will change accordingly. For this reason, UL has established a formal industry modification procedure.

The effective date will be announced when each change to the UL standard is published. From the effective date, the relevant products that belong to the UL tracking inspection service must be changed accordingly in accordance with the new requirements, so there is sufficient time between the date of standard modification and the effective date of publication, so that the factory can change its own Products and submit UL test again. After the change request is formally adopted, the industry revision procedure is implemented. The procedure includes: sending a formal notice to the applicant, the starting date of the change, and UL engineers following the same method of identifying the product, helping the applicant to check the parts of the product that need to be changed, and modifying the UL factory tracking inspection file before the effective date. After the new standard comes into effect, UL inspection representatives will visit the manufacturer to review the corresponding changes according to the revision requirements.