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How many kilowatts can 4 square copper core line bear
The national standard bvr4.0 (bv4.0) square (mm) multi strand copper core (single strand) wire can provide 7000W rated power in the 220 V AC circuit; the 380V AC circuit can provide 12KW rated power, and the rated current of bvr4.0 copper wire is 25A
How many kilowatts of electrical appliances can a 2.5 square copper wire bear
There is a relationship between bearing capacity and current, the current must be calculated first! The current algorithm is power calculation method. 220 V single phase I = P / u i current. P power, u voltage
380V three-phase four wire I = P divided by (root sign 3 times COS) cos is 0.75 when COS is unknown
The safe current carrying capacity of 2.5 square millimeter copper power line is - 28a
The safe current carrying capacity of 4mm2 copper power cord is 35A
The safe current carrying capacity of 6mm2 copper power line is 48A
The safe current carrying capacity of 10 square millimeter copper power line is - 65A
The safe current carrying capacity of 16 square millimeter copper power line is 91A
The safe current carrying capacity of 25 square millimeter copper power line is 120a. The high temperature environment line is thicker!
There is a formula:
Multiply it by nine at 2.5 and go up minus one
Multiply 35 by 3.5, double double group minus 0.5
Conditions are variable plus conversion, high temperature 10 fold copper upgrade
The number of pipes is 234, 876
How many kilowatts can a 10 square copper core load
If it is used at 220 V, the allowable continuous load current of open line is 70 A, equivalent to 15.4 kW; if two lines are arranged in one branch pipe, the allowable continuous load current is 60 A, equivalent to 13.2 kW; if three lines are arranged in one branch pipe, the allowable continuous load current is 55 A, equivalent to 12.1 kW
How many kilowatts can a square copper core load
If the line is several meters long, the single-phase 220 V is about 1.5 kW
How many watts can 10 square copper wire bear
10 square copper wire, 30 ℃ ambient temperature, four through plastic pipe, plastic insulated wire, each allowed maximum long-term load current
41a, equivalent power 9kw, three-phase total power 27kw; the maximum allowable long-term load current of each rubber insulated wire is 43a, equivalent work
5 kW, three-phase total power 28. 5 kW. If the oven is three-phase, it should not be a problem. If it is single-phase, the live line and zero line are both stable
It's better to use two or seven wires, but it's difficult to balance five. Try to avoid joints in the pipe, and have to use a wire presser
The problem often lies in the joint
How to calculate the weight of copper wire. For example, bv2.5mm2 is multiple
Tell you the density of copper:
The density of pure copper and oxygen free copper is 8.9 (g / cm3),
89 (g / cm3),
The density of processed brass is 8.5-8.8 (g / cm3),
The density of cast brass is 7.7-8.55 (g / cm3),
The density of alloy copper commonly used as conductor is between 7.8 and 8.3. The purpose and standard of each manufacturer and wire are different. Use 8.3 to calculate
If 2.5 is the diameter, the mass per meter is
8.3 * 1000 * (1 / 4) * 3.14 * 2.5 * 2.5 * 10 ^ (- 6) * 1 = 0.0407kg = 40.7g (unit length)
The calculation is for reference only
The diameter of a copper wire is 0.09mm and the length is 1000m. It is better to have a detailed calculation formula for its weight
The volume of copper wire v = s * l = π (D / 2) & sup2; * l is calculated
The density of copper is 8.92 g / cm3
Mass m = density * volume = 56g
What is the formula for calculating the weight of 1 mm copper wire 1000 meters in diameter?
Sectional area = 3.14 * 0.001 ^ 2 / 4 = 7.85 * 10 ^ (- 7) m2
Volume = 7.85 * 10 ^ (- 7) * 1000 = 7.85 * 10 ^ (- 4) M3
Mass = volume * density = 7.85 * 10 ^ (- 4) * 8920 = 7kg
What is the formula for calculating the weight of 0.15mm copper wire 1000 meters?
Density of copper 8.9 x 10 ^ 3kg / m3
The Formula M = density x volume
=8.9*1000*[0.15*10^(-3)/2]^2*pi*1000
=0.15727598222033902400053608437543
About 0.157 kg
Two copper wires of the same length, one 2.5 square mm and one 4 square mm, have the same resistance?
The resistance values of two kinds of copper wires are different. The resistance of the wire with large cross section is small. The resistivity of copper wire is 0.0172. Take length 100 as an example
Wire resistance of 2.5 square copper wire:
R＝ρ×L/S＝0.0172×100/2.5＝0.688(Ω)
4 square copper wire resistance:
R＝0.0172×100/4＝0.43(Ω)
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