1) Look at the label.

      The content of the wire certificate produced by a regular manufacturer should include: 3C certification mark, certification number, model specification, implementation standard, rated voltage, wire length, production date, manufacturer, inspector, factory name, factory address, fixed telephone, anti-counterfeiting label and many more. The labels of counterfeit products are often unclear or incomplete.

      2) Look at the surface.

      The plastic sheath of the national standard line is soft and smooth, and the color is uniform. On its surface, there should be several items printed on the product certificate, such as: 3C certification mark, certification number, model, rated voltage, executive standard, factory name, etc. At the same time, the handwriting must be clear and easy to understand. Not easy to erase.

      3) Try to bend.

      It is recommended to bend the thread repeatedly by hand. All products with soft hand feeling, good fatigue resistance, plastic or rubber hand feeling and elasticity, and no cracks in the wire insulation are the best products. The insulation layer of the fake wire looks very thick, but in fact most of it is made of recycled plastic. As long as you squeeze it slightly, the squeezed part will turn white, and the wire will break when bent 4-6 times;

      4) Tear the insulation.

      High-quality insulating materials have certain mechanical strength and flexibility, and are not easy to tear. Inferior wires can be torn off or pinched off by hand;

      5) Look at burning.

      According to regulations, the insulation layer of the wire has a certain flame retardancy. Peel off a section of insulation and ignite it with a lighter. Low-quality wires that can continue to ignite spontaneously after leaving an open flame.