If everybody's home decoration will come into contact with the purchase of a piece of material, it is suggested that the main material of the home is purchased by everyone. If the hydropower reform is necessary, how many wires will be purchased? You may hear that the worker master will calculate the number of squares for you. In order to determine how much wire to buy, how does that wire look at the square? How is the square of the wire calculated? Following Xiaobian understand it. The number of squares in the wire is a verbal expression in the decoration of hydropower construction. The number of squares of wire is often said to have not been added in units of square millimeters. The square of the wire is actually marked by the cross-sectional area of ​​the wire, that is, the area of ​​the round cross-section of the wire in square millimeters. If you want to determine the thickness of the wire (square), use a vernier to measure the diameter of the wire, and then calculate the cross-section, section of the calculation formula: S = radius squared R?? × π. For example, a line with a diameter of 1.76 is 1.76 x 2 x 3.14 = 2.76 x 2.5 squared (approximate). If you want to select the size of the wire, it is generally based on the size of the power used to calculate the current, and then according to the current in the inspection of electrical manual can be more accurate. If it is single-core, its diameter can be measured, and then the radius can be obtained. According to the area formula, S = radius * radius * 3.14, the cross-sectional area of ​​the wire can be known, and some lines are twisted by multiple core combinations. Together, so you can not use the single-core method to calculate, can only be based on this line in one of the lines to take a single core count, and then multiply the number of lines can be, the formula is S = radius * radius * 3.14*N, where N is the number of twisted wires! Wire and cable size is squared, multi-strand wire is the sum of the cross-sectional area of ​​each wire, for example, 48 strands (0.2 strands per strand) 1.5 square strands: 0.785X (0.2X0.2) X48=1.5 1. The safe ampacity of general copper conductor current carrying wire is determined according to the maximum temperature, cooling conditions and laying conditions of the permitted core. The safe current-carrying capacity of copper wires is generally 5~8A/mm2, and the safe current-carrying capacity of aluminum wires is 3~5A/mm2. [Key points] The safe current-carrying capacity of copper wire is 5~8A/mm2, and the safe current-carrying capacity of aluminum wire is 3~5A/mm2. Such as: 2.5 mm2 BVV copper wire recommended value of safe carrying capacity 2.5 × 8A/mm2 = 20A 4 mm2 BVV copper conductor safe carrying capacity recommended value of 4 × 8A/mm2 = 32A. 2. Calculate the cross-sectional area of ​​the copper conductor The recommended value of the safe current carrying capacity of the copper conductor is 5~8A/mm2. Calculate the upper and lower ranges of the cross-sectional area S of the selected copper conductor: S=[I/(5~8)]=0.125 I ~ 0.2 I (mm2) S----- copper conductor cross-sectional area (mm2) I----- load current (A). 3, power calculation General load (can also be used electrical appliances, such as lighting, refrigerator, etc.) is divided into two types, one type of resistive load, one is inductive load. The calculation formula for the resistive load: P=UI The calculation formula for the fluorescent lamp load: P=UIcosф, where the power factor of the fluorescent lamp load is cosф=0.5. Different inductive loads have different power factors, and the power factor cos can be taken as 0.8 when the household appliances are uniformly calculated. In other words, if a household has all appliances plus a total power of 6000 watts, the maximum current is I=P/Ucosф=6000/220*0.8=34(A) However, under normal circumstances, it is not possible to use household appliances at the same time. Therefore, plus a common coefficient, the common coefficient is generally 0.5. Therefore, the above calculation should be rewritten as I=P*common coefficient/Ucosф=6000*0.5/220*0.8=17(A) That is, the total current value of this home is 17A. 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After reading this article, everyone has a certain understanding of how many wires to buy. If everyone needs to buy wires, You can go to the online mall of this website to purchase related materials. Finally, we wish everyone can buy satisfactory products. If you still have something you don't understand, you can leave a message to Xiaobian at the bottom. We will answer your questions as soon as possible. Wire Plug Wire Switch Wire Brand Wire Optional Wire Sheet Metal Parts,Stamping Steel Parts,Prince Metal Stampings,Drawings Of Metal Stamping Parts JIANGSU TONGDE INTERNATIONAL TRADE CO.LTD. , https://www.jstongdetrade.com First, how to look at the number of square wire 
Second, the square of wire calculation Third, the calculation of conductor cross-sectional area and current carrying capacity 
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How to look at the square of the square wire
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