How To Judge The Quality Of Wiring Accessories?

First, look at the material. High-quality wiring accessories usually use metals with good conductivity and corrosion resistance, such as pure copper or copper alloy to make the conductive part, and the outer shell uses flame-retardant, high-strength plastic. For example, the copper part of the terminal block of a well-known brand is bright in color, free of impurities, and has moderate hardness. You can observe the appearance of the product to check whether there are defects or cracks, and whether the logo is clear and complete. Formal products will be marked with information such as brand, specifications, certification marks, such as CCC certification (China Compulsory Product Certification), UL certification (Underwriters Laboratories certification), etc. In addition, simple performance tests can be performed, such as measuring the resistance of the terminal block with a multimeter. The lower the resistance value, the better the conductivity. For wire connectors, you can gently pull the wire after connection to see if it is firm and not easy to fall off. ​