First, it depends on

whether there is a quality system certificate; See if the certificate is standardized; See if there is any factory name, address, inspection stamp and production date; See if there are trademarks, specifications, voltages, etc. printed on the wires. It also depends on the cross section of the copper core of the wire. The superior copper is bright and soft, otherwise it is defective.

Second, try

It is advisable to bend a wire end repeatedly by hand. Anything that feels soft, has good fatigue strength, is elastic in plastic or rubber, and has no cracks on the wire insulator is an excellent product.

Three-weight

Wires with good quality are generally within the specified weight range. For example, the common plastic insulated single-strand copper core wire with a cross-sectional area of 1.5mm2 weighs 1.8 ~ 1.9kg per 1 m; 2．5 mm2 plastic insulated single-strand copper core wire, with a weight of 2.8 ~ 3. kg per 1 m; The weight of 4.mm2 plastic insulated single-stranded copper core wire is 4.1 ~ 4.2kg per 1 m. The wires with poor quality have insufficient weight, or insufficient length, or there are too many impurities in the copper core of the wires.

Fourth look at copper

The copper core of a qualified copper-core wire should be purplish red, shiny and soft to the touch. The fake copper core wire is purple-black, yellow or white, with many impurities, poor mechanical strength and toughness, which will break with a little force, and the wire is often broken.

during inspection, you only need to peel off one end of the wire by 2 cm, and then rub it slightly on the copper core with a piece of white paper. If there is black substance on the white paper, it means that there are many impurities in the copper core. In addition, the insulation layer of fake and inferior wires seems to be very thick. In fact, most of them are made of recycled plastics. Over time, the insulation layer will age and leak electricity.

five depends on the price. Because of the low production cost of fake and shoddy wires, vendors often sell them at low prices under the guise of cheap and good quality, which makes people fall for it.

Extended information:

Corporate philosophy:

We have provided high-quality and low-priced products to the society for a long time, which has won the trust of our customers.

The products cover all parts of the province, and all the major buildings in Zhengzhou International Airport, Zhengzhou International Trade Building, Provincial Great Hall of the People, Provincial Radio and Television Building, Provincial Museum, New Zhengzhou University, Medical Building of Zhengzhou University Medical College, New Outpatient Building of Henan Medical College, Information Engineering College of the People's Liberation Army, Jinboda Shopping Center, Dennis Shopping Center, Jiaozuo Power Plant, Luoyang shouyangshan Power Plant, Zhengzhou Sewage Treatment Plant, Nanyang Sewage Treatment Plant, and Zhengdong New District give high praise to my products.

we hope that new and old users will patronize us, and sincerely hope that you will put forward your valuable views and opinions on our product quality, after-sales service and product price. We firmly believe that the development and growth of the enterprise will never be separated from the trust, care and support of our customers, and their valuable opinions and suggestions will always be the source of improvement and improvement of the factory. We sincerely welcome new and old customers from all walks of life to cooperate and work hand in hand to create brilliance.