1. Check the "CCC" certification mark. Therefore, the cable products are national mandatory safety certification products. All production enterprises must obtain the "CCC" certification certified by the China Electrotechnical Products Certification Committee, obtain the "CCC" certification mark, and have the "CCC" certification mark on the certificate or product.
2. Look at the inspection report. Cables, as products affecting personal and property safety, have been listed as the focus of government supervision and inspection, and regular manufacturers are subject to inspection by the supervision department on a periodic basis. Therefore, the seller should be able to provide the quality inspection department inspection report, otherwise, the quality of the cable product quality is lack of basis.
3. Focus on packaging. The packaging of wire and cable products is the same as other products. For large and medium-sized formal enterprises that produce products that meet the requirements of national standards, the cable produced is very focused on product packaging. When purchasing, pay attention to the packaging, the printing should be clear, the model specifications, factory name, and factory address are complete.
4, look at the appearance, the product looks smooth and round, uniform color. Cable line enterprises that meet the requirements of national standards, in order to improve product quality, to ensure that products meet the requirements of national standards, in the purchase of raw materials, production equipment, production processes and other aspects of strict control. Therefore, the appearance of the produced wire and cable products meets the standard requirements: smooth and round, and uniform in color. The appearance of the counterfeit cable is rough and dull. For the rubber insulated flexible cable, the appearance is required to be round, and the sheath, the insulation, and the conductor are not easily peeled off. The counterfeit and inferior products have a rough appearance, a large ovality, and a low insulation strength of the sheath, which can be torn off by hand.
5, look at the conductor, the conductor is shiny, DC resistance, conductor structure size, etc. in line with national standards. Wire and cable products that meet the requirements of national standards, whether it is aluminum conductor or copper conductor, are bright and oil-free. Therefore, the DC resistance of the conductor is in full compliance with national standards, with good electrical conductivity and high safety.
6. Measure the length of the cable. Length is the main intuitive method to distinguish between national standards and counterfeit products. When purchasing, don't be tempted to buy cheap wire and cable with 90m or 80m, or even no length mark. The length must meet the 100±0.5m standard requirement, that is, the standard of 100m is 0.5m.