Cable Quality Identification

The state has made it clear that copper conductors should be used in new residential buildings. However, it is also a copper wire, and there are also inferior copper wires. The copper core is made of recycled copper, which contains many impurities. Some inferior copper wires are even less conductive than iron wires, which can easily lead to electrical accidents. There are many varieties, specifications and prices of wires on the market, which make it very difficult for consumers to choose. As far as the price of two copper core wires of 2.5 square millimeters and 4 square millimeters commonly used in home decoration is concerned, the price of a coil of the same specification can vary by 20% to 30% because of different manufacturers. As for the quality and length, it is even more difficult for consumers to judge.

According to industry sources, the reason why the price of wires varies greatly is due to the different raw materials used in the production process. The main raw materials for the production of electric wires are electrolytic copper, insulating materials and sheathing materials. In the raw material market, electrolytic copper is about 50,000 yuan per ton, while the recovered miscellaneous copper is only about 40,000 yuan per ton; the price of high-quality products of insulating materials and sheathing materials is 8,000 yuan to 10,000 yuan per ton, while the price of defective products The price is only 4,000 yuan to 5,000 yuan per ton, and the price difference is even greater. In addition, insufficient length and insufficient glue content in the insulator are also important reasons for the price difference. The length of each coil is 100 meters for superior products, and only about 90 meters for inferior products; superior products with glue content in insulators account for 35% to 40%, while defective products are only 15%. Through comparison, it is not difficult for consumers to see that the difference in the sales price of finished wires is caused by the tricky material.