1. Look at the "CCC" certification mark. Wire and cable products are national compulsory safety certification products. All manufacturers must obtain the "CCC" certification certified by the China Electrical Products Certification Committee, and have the "CCC" certification mark on the certificate or product.

2. Look at the inspection report. As a product that affects personal and property safety, wire and cable has always been listed as the focus of government supervision and inspection, and regular manufacturers are subject to periodic inspections by supervision departments. Therefore, the seller should be able to provide the inspection report of the quality inspection department, otherwise, the quality of wire and cable products is lack of basis.

3. Look at the packaging. Where the production of products in line with national standards of formal enterprises, the production of wire and cable is very pay attention to product packaging. When purchasing, pay attention to exquisite packaging, clear printing, complete model specifications, factory name and address.

4. Look at the appearance. Product appearance smooth and round, uniform color. Wire and cable companies whose products meet the requirements of national standards, in order to improve product quality and ensure that products meet the requirements of national standards, strictly control the purchase of raw materials, production equipment, and production processes. Therefore, the appearance of the produced wire and cable products meets the standard requirements, smooth and round, and uniform in color. The appearance of fake and shoddy products is rough and dull. For rubber insulated flexible cables, the appearance is required to be round, and the sheath, insulation and conductor are close and not easy to peel off. The fake and inferior products have rough appearance, large ovality, and low insulation strength of the sheath, which can be torn by hand.

5. Look at the conductor. The conductor is shiny, and the DC resistance and conductor structure size meet the requirements of national standards. Wire and cable products that meet the requirements of national standards, whether aluminum conductors or copper conductors, are relatively bright and oil-free, so the DC resistance of the conductors is fully in line with national standards, with good electrical conductivity and high safety.

6. measure the length of wire and cable. Length is the main intuitive way to distinguish between products that meet the requirements of national standards and fake and shoddy products. When buying, do not covet cheap, buy the actual number of meters below its nominal number of wires and cables. The length must be consistent with the nominal number of meters. The state stipulates that the allowable error is 0.5 meters per hundred meters.