First, how to choose wires
The household power cord shall be of BVV2×2.5 and BVV2× 1.5 models. BVV is the national code, which is sheath line BVV2×2.5 and BVV2× 1.5, representing 2 cores 2.5 mm2 and 2 cores 1.5 mm2 respectively. Generally, BVV2×2.5 is used as the main line and trunk line, and BVV2× 1.5 is used as the single branch line and switch line. BVV2×4 is used for one-way air conditioning special line, and special grounding wire is provided.
In the design of home improvement, the quality of home improvement wires can be judged from the following aspects: the regular product wires are made of pure copper, the outer layer is slightly soft, and the informal product copper is darker and harder, belonging to recycled copper, with high resistivity and poor conductivity, which will cause heat and be unsafe.
CCC mark
Wires must be marked with CCC, and wire and cable products are national mandatory safety products. All production enterprises must obtain CCC from China Electrical Products Committee, obtain CCC mark, and have CCC mark on xx or products. Wires are related to the safety of electricity use, and the quality of wires will affect the safety of our lives and property, so we must choose wire products with CCC logo.
Second, what brand of home improvement wires is good?
Shanghai Shenghua Cable Co., Ltd., formerly known as Shanghai Haixin Cable Factory, was founded in 1987 and later renamed as Shanghai Shenghua Cable Factory in 1998. In 2002, Shanghai Shenghua Cable Group was reorganized. Shanghai Shenghua Cable Group is one of the cable manufacturers in China, ranking 354th among the top 500 manufacturing enterprises in China. All products have obtained the national production license and the national coal industry "Ma" safety sign license. At present, Shenghua Cable ranks second among the top ten wire brands in home improvement.
Third, the wire decoration is trapped.
length
This is one of the common tricks to cut corners. Some people will say that the wire I bought is marked with meters, but it is actually 100 meters. You should pay attention, but in the middle part, some profiteers are short of 10 meters. Such as wire diameter
This is one of the common ways to cut corners in decoration. For example, 2.5 square BV wire, commonly known as copper sheet, is copper wire. Why is it called 2.5 square Because the copper cross-sectional area of this wire is 2.5 square millimeters. The diameter of copper wire of 2.5 square BV line is1.78mm. ..
Copper quality
Real copper is red and brass is yellow. In addition, copper is soft and brass is hard. As long as you don't buy copper-clad aluminum (aluminum material, but coated with copper, usually used for soft wires), brass is not too fake at present.
The above is about what brand of home improvement wires are good, and I hope it will help everyone!