1. Wire selection
Choose wire, mainly from the following aspects to judge the pros and cons of the product:
1. Look: First check whether the content of the outer packaging certificate is complete, including 3C mark, certification number, specification, model, rated voltage, length, production date, inspection seal, etc.; Secondly, check whether the line type is complete and clear. The NATIONAL standard requires that the line type must have 3C logo, factory number, company name, model and voltage level.
2, try: first look at the copper core gloss, insulation layer is smooth and uniform, repeated bending test softness, observe whether there is turtle (Jun) crack. The copper core of high quality wire has good gloss, soft feel, and there will be no obvious black material in the slight friction on the white paper, and the insulation layer has no sense of particles, no cracking after repeated bending. In addition, the insulation layer needs to be cut off to observe whether the copper core is located in the middle of the insulation layer. Poor production process will lead to copper core deviation, when using a large amount of electricity, the thinner side is likely to be broken down by the current, there are fire hazards.