There are thousands of wire and cable manufacturers in China, and the quality is uneven. For the majority of users, it is very complicated to select high-quality products from many wire and cable brands. The cable network Xiaobian collects the following five methods for distinguishing the quality of wire and cable from the network for the reference of users: There are thousands of wire and cable manufacturers in China, and the quality is uneven. For the majority of users, it is very complicated to select high-quality products from many wire and cable brands. The cable network Xiaobian collects the following five methods for distinguishing the quality of the wire and cable from the network for the reference of the users:
First, look at it with your eyes
First, see if there is a quality system certification; second, see if the certificate is standardized; third, see if there is a factory name, site, inspection chapter, and production date; and see if there are trademarks, specifications, voltages, etc. on the wires.
Second, hand test
It is advisable to repeatedly bend a wire head by hand. Any soft touch, good fatigue resistance, strong plastic or rubber feel and no crack on the wire insulation are excellent products.
Third, distinguish copper
Generally qualified wire copper core should be purple, shiny, soft to the touch. The copper core of the inferior wire is purple-black, yellowish or white, with many impurities, poor mechanical strength, poor toughness, and will be broken with a little force, and even there is often a broken wire in the wire. When inspecting, just peel off the wire by 2cm, then use a piece of white paper to rub it slightly on the copper core. If there is black material on the white paper, it means there are more impurities in the copper core.
Fourth, weigh
Good quality wires are generally within the specified weight range. Here are a few sets of data for your reference.
In general, the commonly used plastic insulated single-strand copper core wire with a cross-sectional area of ​​1.5 mm2 is 1.8-1.9 kg per 100 m; and the plastic insulated single-strand copper core wire of 2.5 mm2 is 3-3.1 kg per 100 m weight; The 4.0mm2 plastic insulated single-strand copper core wire has a weight of 4.4-4.6kg per 100m. Therefore, the poor quality wire is either underweight or not long enough, or the wire core is too much impurity.
Five, the price
Due to the low production cost of counterfeit and shoddy wires, merchants often sell at low prices with low prices and good prices when they are selling, tempting people to be fooled. Therefore, the psychology of coveting cheapness must be abandoned.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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