What are the potential safety hazards of using fake home improvement wires and cables

Home improvement wire and cable as the main role of power transportation and signal transmission, our country has been strictly control the quality of home improvement wire and cable, and some poor manufacturers in order to seek personal gain will produce fake and inferior wire and cable. The key problems of fake and inferior wire and cable include specifications, resistors, insulation sheath and other aspects. The following is an in-depth analysis of what hidden dangers this fake and shoddy commodity will cause.

1. After the safety accident of short-circuit fault (short-circuit fault) occurred in the home decoration wire and cable, the common fault of relay protection was not disconnected in posture, resulting in over-temperature of wire and cable and fire of cable sheath.

2. The compressive strength and elongation of the insulating sheath before aging are not closed, which immediately greatly shortens the service life of the wire and cable. In addition, in engineering or long-term plug-in and continuous high temperature environment, it is easy to cause insulation rupture, resulting in the exposure of energized electrical conductors, resulting in the risk of electric shock accident-type short-circuit fault.

3. For wires whose conductor resistance does not meet the requirements, when the conductor resistance exceeds the standard, the current damage on the lifting route will increase the heating of the wires and cables. The main reason why the conductor resistance does not pass is that in order to control the cost, the company will reduce the copper, which accounts for 80% of the material cost, or reduce the cross-sectional area of the electrical conductor, or use recycled copper with too many impurities, resulting in the conductor resistance of the wire and cable being more serious than the standard.

4. The cable sheath of home decoration wire and cable will slowly age in normal operation. The wire is often loaded or overvoltage during the service life. In addition, the cable sheath is thin and thick, and the assembly is unreasonable (such as the bending radius of the cable is too small and the diameter of the wire maintenance tube is too small), which may lead to safety accidents.

5. For wires and cables where the cross-sectional size does not meet the requirements, the important key to the cross-sectional size is the thickness of the sheath and the thickness of the insulation layer. When the cable sheath and the insulation layer do not meet the requirements, the electrical strength of the wire and cable will be significantly reduced. The service life of the wire and cable is reduced. In more serious cases, the wire and cable will fail, and the insulation layer (sheathing) layer can not have normal maintenance function, resulting in short circuit fault and fire accident of electrical equipment.

four kinds of home improvement wire don't buy:

1. The cable sheath is too thick, do not buy too thick wire

The national industry standard expressly stipulates that the uniformity of cable sheath should be thinner, and the insulation of high-quality transmission lines should be thin and uniform, without axial force, and it is not easy to disconnect when pulled by force.

2. Cable copper wire black, dark wire do not buy

Excellent all-copper cable copper wire is purple and gold, with bright appearance, no burrs, soft and resistant, and not easy to crack.

3. Check the insulation skin of the home improvement wire

When identifying home decoration wires, you can use your fingernails to scratch or pinch the skin of the insulating layer, and the ones that can be scratched or pinched are usually fake and inferior wires.

4. Do not buy wires without CCC certification marks

Do not buy wires that do not have China's mandatory CCC certification mark. And the wire must also have established a clear trademark, norms, current and other major parameters.