How to identify the pros and cons when buying wires The […]
How to identify the pros and cons when buying wires
The state has explicitly ordered the use of copper wires in newly built houses. But the same copper wire, there are also inferior copper wires. The copper core is made of recycled copper, which contains many impurities. Some inferior copper wires are not as conductive as iron wires, which can easily cause electrical accidents. There are many varieties, specifications, and prices of wires on the market, making it very difficult for consumers to choose. Just in terms of the price of two copper core wires of 2.5 square millimeters and 4 square millimeters commonly used in home decoration, a coil of the same specification can have a price difference of 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 huge price difference of wires is due to the different raw materials used in the production process. The main raw materials for the production of wires are electrolytic copper, insulating materials and sheathing materials. The electrolytic copper in the raw material market is about 50,000 yuan per ton, while the recycled miscellaneous copper is only about 40,000 yuan per ton; the price of high-quality products of insulating materials and sheathing materials is between 8,000 yuan and 10,000 yuan per ton, while 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 insulators are also important reasons for price differences. The length of each reel is 100 meters for high-quality products, while only 90 meters for inferior products. The insulators contain 35%-40% of the glue, while the defective products are only 15%. By comparison, it is not difficult for consumers to see that the difference in the sales price of finished wires is caused by the presence of tricky materials.