See if there is a quality system certificate; See if the certificate is standardized; See if there is a factory name, address, inspection stamp and production date; See if there are any trademarks, specifications, voltages, etc. Printed on the wire. It also depends on the cross section of the copper core of the wire. Superior copper is bright and soft, otherwise it is inferior.
Second, try.
It is recommended to bend the end of the wire repeatedly by hand. All products with soft hand feel, good fatigue strength, elasticity in plastic or rubber, and no crack on conductor insulator are excellent products.
Triple weighing
High quality welding wire is usually within the specified weight range. For example, the common plastic insulated single-stranded copper conductor with a cross-sectional area of 1.5mm2, per 100 m weight1.8 ~1.9kg; 2.5 mm2 plastic insulated single-stranded copper core wire, with a weight of 2.8 ~ 3.0kg； per 100 m; The weight of 4.0mm2 plastic insulated single copper core wire is per1100m4.1~ 4.2kg. The wires with poor quality are either short in weight or length, or have too many copper core impurities.
Look at the copper.
Qualified copper core wire copper core should be purple, shiny and soft to the touch. False copper core wire is purple-black, yellow or white, with many impurities and poor mechanical strength and toughness. It will break with a little force, often breaking wires.
When checking, just peel off one end of the wire by 2 cm, and then gently rub it on the copper core with a piece of white paper. If there is a black substance on the white paper, it means that there are many impurities in the copper core. In addition, the insulation 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.
Fifth, look at the price. Because of the low production cost of fake and shoddy wires, vendors often sell them at low prices under the guise of good quality and low price, which makes people fall for it.
Extended data:
Company philosophy:
We have long provided quality and cheap products for the society and won the trust of our customers.
Our products cover all parts of the province, and our products have received rave reviews from 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 PLA, 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.
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