At present, some users often ask whether the terminal product has passed UL certification when purchasing wiring terminals. So what is UL certification, why do terminals need to undergo UL certification, and what are the UL certification standards for wiring terminals? Below, the editor of Hengzhuoneng will explain it to everyone!

　　What is UL certification

　　UL stands for UnderwriterLaboratories Inc, which is the most authoritative organization in the United States and a professional body engaged in safety testing and certification worldwide.

　　And UL certification for wiring terminals refers to wiring terminals that have passed UL safety tests.

　　Why do terminals need UL certification

　　In fact, UL certification is not just about certifying terminal blocks, it is also a testing standard for products that is equally applicable to other products.

　　UL certification is the creation and testing of the National Product Safety Standards in the United States. It not only provides product testing standards for the electronic wire industry, but also conducts functional tests on thousands of industrial products and other goods. UL certification is one of the important testing conditions for imported goods in the United States, and it is also an important reference for American consumers to recognize and trust products. It has an irreplaceable effect, especially in the terminal wire industry. If the wiring terminal is insulated with lead polyvinyl chloride, it is a harmful chemical substance to the environment and everyone's body, and UL testing will specifically detect this substance. The UL standard not only has a binding and standardization effect on the terminal industry, but also has an insignificant effect on the healthy development of the entire international trade and market.

　　What are the common UL standards for wiring terminals

　　The usual UL standards for terminal blocks include UL1977, UL1059, UL2459, UL486, etc.

　　Different structures and purposes have different applicable standards.

　　What are the requirements for UL certification of wiring terminals

　　1. Wire tension

　　2. Insertion and extraction force

　　3. Temperature rise and thermal cycling

　　4. Voltage resistance

　　5. Tensile strength of insulation sheath

　　The above is an introduction to UL certification for terminals, for reference only. For more information on the terminal industry, please follow the website updates!