With the rapid development of modern society, there are endless types of wires and cables used in industrial technology and production and life. Sometimes, it is found that the price of national standard and non-standard cables of the same type can be twice as much. The quality of wires and cables is closely related to daily life. Therefore, how to correctly check and quickly distinguish national standard cables from non-standard cables?
1. Visual observation
First, check whether the manufacturer has quality management system certification, whether there is a national quality supervision and inspection report, whether the product packaging has the factory name, factory address, production date, whether the trademark, specifications, voltage, etc. are printed on the wire, and you can also look at the cross-section of the copper core of the wire. The copper color of national standard products is bright and soft.
2. Test product
Repeatedly bend the wire, the national standard wire feels soft and tough, has a plastic or rubber feel, has high elasticity, and the wire insulator has no scratches.
3. Weighing weight
The weight of every 100m of the national standard product cable is within the specified range, while the non-standard cable is either insufficient in weight, insufficient in length, or has too many impurities in the copper core of the wire.
4. Price difference
The quality of the product must be proportional to the price. The same product model with a high price difference is generally a non-standard product.
5. Copper core color
The national standard copper core cable is purple-red, shiny and textured. The copper core of non-standard cables is mostly purple-black, yellowish or white, with more impurities or broken wires.