1. Recognize the certification mark

When purchasing, be sure to check whether there is a "3C" certification mark on the certificate, whether the model specifications, rated voltage, length, manufacturing date, certification number, inspection, implementation standards, factory name, factory address, etc. are clear.

2. Pay attention to the packaging

When purchasing, pay attention to the packaging must be exquisite, the printing must be clear, the model specifications, the name of the factory, and the factory address are complete. Counterfeit and inferior wires and cables are often "three-no products", but they also have ambiguous origins and other signs, such as made in China, made in a certain province or city in China, etc., which is actually equivalent to not marking the origin.

3. Check the appearance

When purchasing, pay attention to check the appearance to be smooth and round, with uniform color and good hand feeling. If it is a rubber wire and cable, the sheath and insulation can be burnt with cigarette butts, and the surface is completely undamaged.

4. Check the conductor

The conductor must have a certain degree of gloss and moderate flexibility, and the resulting size of the conductor must meet the requirements of national standards. The cross section of the copper core of the wire and cable, the high-quality copper is bright in color and soft in color, otherwise it is a defective product.