Home decoration wire specification considerations

Household power cords should use BVV2×2.5 and BVV2×1.5 models. BVV is the national standard code, which is copper sheathed wire BVV2×2.5 and BVV2×1.5, representing 2 cores 2.5 square millimeters and 2 cores 1.5 square millimeters respectively. Under normal circumstances, BVV2 × 2.5 do the main line, the main line, BVV2 × 1.5 to do a single electrical branch line, switch line. The one-way air-conditioning line uses BVV2×4, and is equipped with a dedicated ground wire.

When buying the wire, first look at the wire packaging card of the roll with the "Great Wall Mark" and the production license number of the China Electrotechnical Products Certification Committee. Then look at whether the outer plastic skin of the wire is bright and fine, and the lighter should be lit without a fire. . Non-regular products use recycled plastics, with a dull color, loose texture, and an open flame. Second, look at the length and price. The length of BVV2×2.5 per roll is 100±5 meters, and the market price is about 280 yuan. Informal products range in length from 60 to 80 meters. Some manufacturers make the insulation skin thick, making it difficult for the insiders to see the problem. You can roughly calculate the length by counting the number of turns of the wire and multiplying it by the radius of the entire roll. The price of this type of product is between 100 and 130 yuan. Secondly, you can ask the merchant to cut a broken head and see the copper core material. The BVV2×2.5 copper core has a diameter of 1.784 mm, which you can measure with a micrometer. Regular product wires use bright red copper, and the outer layer is bright and slightly soft. The irregular copper is black and hard, and it is a regenerated copper. It has high electrical resistivity and poor electrical conductivity, which will heat up and be unsafe. Finally, you should purchase the wire and go to the professional store such as the electricity store or the manufacturer's sales department.

Home improvement is inseparable from the wires, especially the old houses. A lot of fires are caused by aging of the wires, unreasonable configuration, or poor quality of the wires. Therefore, consumers must polish their eyes when purchasing wires, carefully identify them and prevent them from happening.

At present, there are many types of wires on the market, many specifications, and chaotic prices. It is very difficult for consumers to choose. In terms of the price of two kinds of copper core wires of 2.5 square millimeters and 4 square millimeters commonly used in home decoration, the same specification of one wire, because of different manufacturers, the price can vary by 20% to 30%. As for the quality of the quality, the length is up to standard, consumers are more difficult to determine.

According to industry insiders in the wire industry, the reason why the price difference of wires is huge is due to the different raw materials used in the production process. The main raw materials for the production of electric wires are electrolytic copper, insulating materials and sheathing materials. At present, the electrolytic copper in the raw material market is about 20,000 yuan per ton, and the recovered copper is only about 15,000 yuan per ton; the price of high-quality products of insulating materials and sheathing materials is 8,000 yuan to 8500 yuan per ton, and defective products. The price is only 4,000 yuan to 5,000 yuan per ton, and the difference is even more disparity.

In addition, the length is insufficient and the amount of glue contained in the insulator is insufficient, which is also an important cause of price difference. The length of each line is 100 meters, and the defective product is only about 90 meters; the insulation containing rubber is 35% to 40%, and the defective product is only 15%. By contrast, it is not difficult for the consumer to see that there is a difference in the sales price of the finished wire.

Photochromic Vacuum Glass

Under normal conditions, vacuum glass is transparent. Under the irradiation of ultraviolet or visible light, photochromic vacuum glass can produce light absorption in the visible light area, reduce the transmittance of the glass or change the color, and can automatically return to the original transparent state after the light is stopped. The decorative characteristic of photochromic Vacuum Glass For Buildings is that the color and transmittance of glass change automatically with the intensity of sunlight. High sunlight intensity, dark glass color and low light transmittance. On the contrary, the sunlight intensity is low, the color of the glass is light, and the light transmittance is high. Decorating buildings with photochromic high-tech vacuum glass can not only make the indoor light soft and changeable, but also make the buildings colorful and unpredictable, which is consistent with the sunshine environment of the buildings. This kind of tempered vacuum glass is generally used for building doors, windows, curtain walls, etc.

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