Differentiation of wire and cable between national standards and non-national products

1, look. See if there is a quality system certification; see whether the certificate is standardized; see if there is a factory name, site, inspection seal, production date; see if there are trademarks, specifications, and voltage printed on the wire. Also look at the cross section of the wire copper core, superior product copper color bright, soft color, otherwise it is defective.

2, to try. It is advisable that a wire head be repeatedly bent by hand, and that any product that has soft hand feeling, good fatigue resistance, plastic or rubber feel elasticity, and no crack on the wire insulation body is superior.

3, weigh. Good quality wires are generally within the specified weight range. Such as the commonly used cross-sectional area of ​​1.5mm2 plastic insulated single strand copper wire, each 100m weight of 1.8 ~ 1.9kg; 2.5mm2 plastic insulated single strand copper wire, weight per 100m 3 ~ 3.1kg; 4.0mm2 plastic Insulated single-stranded copper wire weight is 4.4-4.6kg per 100m. Poor quality wires have insufficient weight or are either of insufficient length or have too many impurities in the wire copper core.

4, than the price. Due to the low production cost of Jia Mao's counterfeit wires, when selling, traders often sell cheap goods at low prices, making people fool.

5, see the copper. Qualified copper core wire copper core should be purple, shiny and soft to the touch. The shoddy copper core copper core is purple black, yellowish or white, impurities, mechanical strength is poor, poor toughness, it will be broken with a little force, and often within the wire disconnection phenomenon. When checking, you just strip the wire 2cm, and then use a piece of white paper on the copper core to make a brief look. If there is black material on the white paper, the copper core contains more impurities.