Wire as an indispensable part of daily life, its quality and safety is directly related to people's lives and property safety. Therefore, it is vital to understand and master the method of how to confirm whether the wire meets the national standard.

1. Inspection of certification marks

First of all, we can confirm whether it meets national standards by checking the certification mark on the wire. In China, Mandatory Product certification (CCC) is a certification that wire and cable products must pass. If there is a CCC certification mark on the wire, it can be preliminarily confirmed that the wire meets the national standard.

2. Inspection of manufacturer information

Qualified wires should be clearly marked with the manufacturer's name, address and contact information. In this way, if there is a problem with the wire, we can trace it back to the source of production, which is also an important step to confirm whether the wire meets national standards.

Third, inspection of wire diameter

The diameter of the wire should meet the requirements of the national standard. The wire is too thick or too thin may affect the safety performance and service life of the wire. According to the national standard, different types of wires have their prescribed wire diameter range, we can compare the actual wire diameter and standard wire diameter, to confirm whether the wire meets the national standard.

Fourth, the inspection of color

Wires usually have standard color identification, including red, yellow, blue, brown, gray, black, yellow and green. If the color of the wire is seriously distorted, it does not meet the national standard. For example, ground wires usually use a yellow-green insulation layer. Therefore, the inspection of color is also an important step to confirm whether the wire meets the national standards.

5. Inspection of conductor materials

The conductor core wire of the power cord that meets the national standard is basically made of oxygen-free copper, which has excellent electrical conductivity and stability. If the conductor material does not meet the requirements, then the performance of the wire is difficult to be guaranteed.

6. Inspection of insulation layer

The insulation layer of the wire shall meet the requirements of the national standard. For example, the implementation standard for medium voltage crosslinked polyethylene insulated power cables is GB/T12706.2-2002. If the insulation layer does not meet the standard, then the safety performance of the wire cannot be guaranteed.

Seven, mechanical strength inspection

The wire needs to have a certain mechanical strength to ensure that it is not easy to damage during construction and operation. If the mechanical strength of the wire is insufficient, it may cause the wire to break easily during use, affecting the service life of the wire.

Eight, line resistance inspection

The wire resistance of the wire should meet the national standard, the wire resistance is too large may cause the wire heat, affecting the safety and service life of the wire. Therefore, the inspection of wire resistance is also an important step to confirm whether the wire meets the national standard.

Nine, temperature inspection

The wire should be able to withstand a certain temperature under normal working conditions to ensure the stability and safety of the wire. If the wire can not withstand the normal operating temperature, then it may lead to wire aging, affecting the service life of the wire.

Conclusion: Through the above several aspects of inspection, it can be more accurate to confirm whether the wire meets the national standard. When purchasing and using wires, be sure to choose products that meet national standards to ensure the safety performance and service life of the wires.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098