The quality of home wiring is related to the safety of electricity. It is also part of the hidden project, so we should pay attention to it. According to the section area (mm), the general lighting line is 1.5 square, the electrical outlet is 2.5 square, the air conditioner water heater is 4 square, the central air conditioner and the hot water heater are 6 square. The entrance line is more than 10 square according to the size of the house.
In addition, there are two kinds of commonly used wires for home decoration, BV and BVR (multi ply flexible wires). BV is a copper wire, BVR is multi strand copper wire, the former is hard and the latter is soft, and the latter is slightly expensive. Basically, the BV line is much more. If the wire tube has more elbow lines, the BVR line can be used when the hard wire is difficult to thread.
Qingdao Huaqiang Cable Co., Ltd. is a professional manufacturer of wire and cable. The performance indexes of Huayu brand wire and cable produced by the company all meet the requirements of the International Electrotechnical Commission and the national standards. In order to prevent counterfeit cottage goods, you can pay attention to the following points when purchasing:
We must recognize the Huayu brand and prevent the acquisition of Shanzhai goods. As a coil of wire wrapper, there are "CCC" and production license number of compulsory product certification by the Chinese state; see if there is a certificate of quality system; see if the certificate is standard; see if there is a factory name, site, repair chapter, date of production; see if the wire is printed with a trademark, a gauge, a voltage, etc.
2 length and thickness
A roll of wires 100m, the national standard length error is not more than 0.5%, that is, not less than 99.5m. No cross section of the national standard data, commonly used to cut the area of 1.5mm plastic insulated single strand of copper core, 100m weight of 1.8 to 1.9kg, 2.5mm, each 100m weight of 3 to 3.1kg. Poor quality wires are insufficient in weight or insufficient in length, or too much copper core impurities.
3 eccentricity rate
Intercepting a section of insulating layer to see if the wire core is located in the middle of the insulation layer. If the power consumption is large, the thinner side is likely to be damaged by current.
4 insulating layer
It is advisable for a wire head to be flexed repeatedly by hand, with a soft hand, good anti fatigue strength, large elasticity of plastic or rubber and no crack in wire insulators. The outer plastic skin of the electric wire should be bright and fine with fine texture.