How to calculate the cross-sectional area of a wire?

The wire cross-sectional area algorithm is as follows:

The cross-sectional area of the cylindrical wire=3.14*R*R.R is the radius of the wire.

For example, a wire with a diameter of 2MM has a cross-sectional area=3.14*1*1=3.14 square millimeters.

Cross-sectional area of cuboid wire = height * width

For example, a wire with a width of 4MM and a length of 2MM has a cross-sectional area of 2*4=8 square millimeters.

The cross-sectional area of the multi-strand wire = the cross-sectional area of a single wire * the number of wires.

The cross-section of the wire refers to the cross-section of the copper core inside the wire. Commonly used wire cross sections in houses are 0.5m*m, 1m*m, 1.5m*m, 2.5m*m, 4m*m, 6m*m, 10m*m, 16m*m, 25m*m, 35m*m , 50m*m, etc.

Calculation of power and current

P power = current (I) * voltage (U) China's civil voltage standard value is 220V, the voltage is basically unchanged, equivalent to 1A=220W, that is, 10A current can generate 2200W of power. How much power is 2200W, think about the induction cooker you usually use, and so on.

Copper core wire allows long-term current

2.5 mm2 (16A～25A)

4 mm2 (25A～32A)

6 mm2 (32A～40A)