Home-installed cable, choose to be cautious

The state has explicitly stated that copper conductors should be used in new houses. However, copper conductors are also used, and inferior copper conductors are also used. The copper core uses recycled copper and contains many impurities. Some poor-quality copper conductors are even less conductive than iron wires, which can easily cause electrical accidents. Moreover, the wires of the house are now embedded in the wall or under the ground. Once problems arise, they are difficult to find and more difficult to maintain. Moreover, the quality of the wires is not only due to safety, but also affects the electrical appliances associated with them. Lifetime and safety, so be careful when purchasing.

How to determine the authenticity of the wire, Xiao Bian here to give you some simple ways to identify:

1. Look at the label. The labels of counterfeit products are often unclear or have incomplete print content. 2. Look at the packaging to see if there is any Chinese electrical product certification mark (“CCC” mark) and production license number on the packaging label; whether there is a quality system certification; Whether the certificate is standardized; whether there is a factory name, site name, inspection seal, production date; whether the trademark is printed on the wire, specifications, voltage, etc.

3. Look at the surface. Regular wire plastic sheath is soft and smooth, with uniform color.

4. Look at the cross-section. The surface of the copper or aluminum core of the qualified product should have a metallic luster. The surface of the blackened copper or the surface of the whitened aluminum indicates that it has been oxidized, mostly inferior materials.

5. Try to bend the cable. The counterfeit wire looks very thick, but as long as it is squeezed, the extrusion will be white, and the wire will break when it is bent several times. It is also possible to tear the insulation and the inferior wires can be removed by hand with a block of insulation. If the plastic covering the wire is easily peeled off, there is a possibility that the plastic strength is not enough.

6. If conditions permit, the plastic on the outside of the wire can be ignited. If the flame cannot self-extinguish or self-extinguish for a long time, it means that the flame-retardant coefficient of the wire may not reach the standard.

7. Look at the length and core thickness of the core. The relevant standards stipulate that the error of the length of the wire cannot exceed 5%, and the diameter of the cross section cannot exceed 0.02%. However, there are a large number of short and short lengths on the market, and frauds are made on the cross section (if the cross section is 2.5 mm 2 ). Lines, in fact, only 2 square millimeters thick) phenomenon.

8. In the end, don't forget to shop around with three different products of the same type that are too low.