How many square meters of wire does it take for 25 kilowatts?
If three-phase is used, then the current of 25 kW is about 44.74A, so it is necessary to use 10 square copper core wire, and its cross-sectional flow is about 59A, so as to meet the use requirements. If it is single-phase, its current is about 1 13.64A, so it is necessary to use 35 square copper core wire, and its cross-sectional flow is about 134A.
How to judge the quality of home improvement wires
First, check
You know, no matter how bad the national standard line is, it will be much better than not crossing it. Therefore, before buying wires, you must first judge whether the wires meet the national standard. Its practice is very simple, that is, by checking the product certificate, 3C mark, trademark, instructions and so on. , you can preliminarily judge the quality of the wire.
Second, look.
Secondly, it is to peel off the insulation layer of a section of wire, mainly by looking at the color of the conductor inside, so it is easy to know whether it is good or bad. The best quality copper wire is purple, so it is called? Copper or copper? . Almost copper wire is mainly golden yellow, so it is called? Brass? . And the worst copper wire is black. What is it called? Iron and copper? . You know, different copper represents different purity, impurity content and conductivity.
Third, touch
Then touch the conductor. If it is a high quality conductor, its surface is smooth and burr-free. The worse the conductor is, the rougher its surface is, and even it has obvious itching feeling.
Then touch the insulation layer, which is generally a high-quality insulation layer with good elasticity. You can scratch it gently with your nails. If scratches can be left, it means that the insulation layer has poor elasticity.
Editor's summary: After reading the above introduction, I believe everyone has a further understanding of how many square meters of wires are needed for 25 kilowatts. Please continue to pay attention to our website for more information, and more exciting content will be presented to you later.