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How to Distinguish the Quality of Wire and Cable

The distinction between the quality of wire and cable: 1. Good quality wire, the weight is within the specified range. 2. Observe whether there is quality system certification, anti-counterfeiting mark, whether the packaging is intact; whether the certificate of conformity is standardized. Observe the packaging for the factory name, address, inspection seal, production date; whether the trademark specifications, voltage, etc. are printed on the wires. Looking at the cross-section of the copper core of the wire, the color of the copper is bright, the color is soft, and the copper core is a reddish yellow to yellow, indicating that the copper material used is of good quality, while the yellowed copper is white. The inferior copper core wire is purple-black, yellowish, or white, with many impurities, poor mechanical strength, and poor toughness. It will break with a little force, and the wire is often broken.

How to Distinguish the Quality of Wire and Cable

How to check? Teach everyone a small way. Take a piece of wire, peel off one end 2-5cm, then rub a little bit on the copper core with a piece of white paper. If there is a black substance on the white paper, it means there are more impurities in the copper core. In addition, counterfeit and inferior wires are often three-no-products, but there will be ambiguous signs of origin, such as made in China, made in a province or city in China.

It is stipulated in the relevant standards that the error of wire length measurement cannot exceed ±0.5%, and the interface wire diameter cannot exceed ±0.1%. In terms of price, many people like good quality and low price, and some people make fake and inferior electric wires to make people fooled. Quality determines the price.


Yeahui is a connector supplier with 11 years of experience in developing high-quality connectors and wiring harnesses. We have many types of products, including obd connector, circular connector, agricultural connector and so on. We can meet the requirements of various customers. Feel free to learn more about connectors or buy our connectors, looking forward to your message.

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