How to check the wire quality

2022-07-22
  • Detail

The quality of wires not only depends on the safety of use, but also affects the service life and safety of associated electrical appliances. So how to choose and check the quality of wires? 1. See. Check whether there is quality system certification; Check whether the certificate of conformity is standardized; Check whether there is factory name, address, inspection seal and production date; Look at wires

the quality of wires not only depends on the use safety, but also affects the service life and safety of associated electrical appliances. So how to choose and check the quality of wires

1. Look. Check whether there is quality system certification; Check whether the certificate of conformity is standardized; Check whether there is factory name, address, inspection seal and production date; Check whether the trademark, specification, voltage, etc. are printed on the wire. It also depends on the cross section of the copper core of the wire. The superior red copper is bright and soft in color, and the copper core is yellow and red, indicating that the copper used is of good quality, while the white in yellow is the reaction of low-quality copper. Otherwise, it is defective

2. Try it. Take a wire head and bend it repeatedly by hand. Those with soft hand feeling, good fatigue resistance, large elasticity of plastic or rubber hand feeling and no cracks on the wire insulator are excellent products

3. Cut off a section of insulation layer to see whether its core is in the middle of the insulation layer. What is not in the middle is the core deviation caused by low technology. If the power is small, it can be safe. Once the power consumption is large, the thinner side is likely to be broken down by current

4. It must depend on whether the length and the thickness of the wire core are tampered with. According to relevant standards, the error of wire length cannot exceed 5% and the diameter of cross-section cannot exceed 0.02%. However, there are a lot of phenomena in the market, such as short weight in length and fraud in cross-section (for example, the wire with a cross-section of 6 mm2 is actually only 4.5 mm2 thick)

襄阳男科医院

上海肿瘤医院

潍坊银屑病医院

Copyright © 2011 JIN SHI