A brand-free and timeless product produced by an unnamed factory.
The 3C conformity mark on the wire is the guarantee of quality. If not, it may be a fake. At the same time, the product name, trademark, address, model and other information on the package is vague or missing, and we should also be alert to quality problems.
Copper core inspection
The copper core of genuine wire should have metallic luster and pure color, with copper or copper color as the best. If the copper core has impurities, mottled colors, or cracks when it is gently bent, it may be a fake and inferior product.
Size and price
The diameter of copper core of ordinary wire should be consistent with the size on the package. Usually, the thicker the copper core, the higher the quality of the conductor and the more expensive it is. Don't be bought a thin copper core wire at a high price!
Insulation quality
Soft and tough insulation is a sign of good wires. If it feels stiff, or the surface is damaged, it may be inferior products. At the same time, a good wire is thin and difficult to rotate.
Color coding
The color of the wire is also particular. The zero line on the left side of the socket should be blue or green, the live wire on the right side should be red or brown, and the middle ground wire should be yellow-green mixed color. This helps to distinguish and install.
Specification selection
When buying wires, you should choose the appropriate specifications according to the purpose. 1.5 square wires are suitable for ground wires, switches and lamps, 2.5 square wires are suitable for sockets and circuit branches, 4 square wires are suitable for high-power household appliances such as main circuits, air conditioners and refrigerators, and a small amount of 6 square wires can be used for household lines. Different specifications cannot be mixed.
Select the national standard line
Home improvement suggests using a safer national standard line. The length of a roll of national standard line is about 100 meter, and the error is small. The national standard wire can quickly return to its original state after bending, and there will be no open flame after ignition, only the melting point.