How to distinguish "national standard" and "non-standard" wire and cable
Release time： 2021-12-21 14:57
There are more and more kinds of wire and cable in the market. How to distinguish the "national standard" and "non-standard" of wire and cable? A look, two try, three weighing, four than the price, five to see copper, five tips.
Nowadays, the application of wire and cable is more and more widely, and the kinds of wire and cable on the market are also more and more. So, how do we distinguish the "national standard" and "non-standard" of wire and cable? To this end, the editor of this magazine consulted the industry veteran, they gave the difference between wire and cable "national standard" and "non-standard" five tips:
Take a look. To see whether the wire and cable products have a quality system certificate, to see whether the certificate is standardized, to see whether there is a factory name, site, inspection seal, production date, to see whether the wire is printed with trademarks, specifications, voltage, etc. Also look at the cross section of wire copper core, excellent copper color bright, soft color, otherwise it is defective.
Second try. It is advisable to bend a wire head repeatedly by hand. Those with soft feel, good fatigue strength, large elasticity of plastic or rubber feel and no cracks on the wire insulator are excellent products.
Three weights. Good quality wire and cable, generally every 100m weight in the specified weight range. For example, if the cross-sectional area of plastic insulated single-strand copper core cable is 1.5mm2, the weight per 100m is 1.8-1.9kg. 2.5mm2 plastic insulated single strand copper core wire, weighing 3-3.1kg per 100m; 4.0-mm2 plastic insulated single-strand copper core wire, weighing 4.4-4.6kg per 100m. Poor quality wire is underweight, either not long enough, or the wire has too much copper core impurities.
Four times the price. Because of the low production cost of fake and shoddy wires, vendors often sell at low prices under the guise of cheap and fine quality, making people fooled. So be careful not to get carried away with the "bargain" and end up being cheated.
Five see copper. Qualified copper wire copper core should be purple, glossy, soft. And shoddy copper core copper core is purple black, yellow or white, impurities, poor mechanical strength, toughness is not good, a little force will be broken, and the wire often broken phenomenon. When checking, you just peel off one end of the wire, and then rub a piece of white paper on the copper core. If there is black material on the white paper, the impurities in the copper core are more, which can be identified as "non-standard" wire and cable.