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Manager , I want to see. Look at the quality system certification; see if the certificate is standardized; see if there is a factory name, site, inspection chapter, production date; see if the trademark is printed on the wire, specifications, voltage, etc. Also look at the cross section of the copper core of the wire, the superior product copper color is bright, soft color, otherwise it is a defective product.
2. Try it. 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.
3. Weigh the weight. Good quality wires are generally within the specified weight range. For example, the commonly used plastic insulated single-strand copper core wire with a cross-sectional area of ​​1.5mm2 is 1.8-1.9kg per 100m; the plastic insulated single-strand copper core wire of 2.5mm2 is 3~3.1kg per 100m; the plastic of 4.0mm2 The insulated single-strand copper core wire has a weight of 4.4 to 4.6 kg per 100 m. Poor quality wires have insufficient weight, either insufficient length or excessive copper core impurities.
4, than the price. Due to the low production cost of counterfeit and shoddy wires, traders often sell at low prices with low prices and good quality when selling.
5, look at copper. The copper core of the qualified copper core wire should be purple, shiny and soft to the touch. The copper core of the inferior copper core wire is purple-black, yellowish or white, with many impurities, poor mechanical strength, poor toughness, and will break when a little force is applied, and the wire is often broken. 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.
Name of Unit: Tianjin Cable Factory Rubber & Plastic Cable Factory