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    National standard wire diameter table and calculation method

    PubDate:2020-11-18Author:花城電纜Sources:花城電纜Views:2589

    National standard wire diameter table and calculation method



    National standard wire diameter table


    Wire (square mm)

    Conductor diameter (mm)

    1.5

    1.38

    2.5

    1.78

    4

    2.25

    6

    2.76

    10

    1.33×7

    16

    1.70×7

    25

    2.10×7

    35

    2.50×7

    50

    1.78×19

    70

    2.10×19

    95

    2.50×19


    Note: The above conductor diameter refers to BV plastic copper wire and BLV plastic aluminum wire


    Conversion method: know the square of the wire, calculate the radius of the wire with the formula for calculating the area of the circle: wire square number (square millimeter) = pi (3.14) x wire radius (mm) square


    Knowing the square of the wire, the same is true for calculating the wire diameter. For example, the wire diameter of a 2.5 square wire is: 2.5 ÷ 3.14 = 0.8, and the square root is 0.9 mm, so the wire diameter of a 2.5 square wire is: 2×0.9 mm = 1.8 Mm.


    Knowing the diameter of the wire, the square of the wire is also calculated by the formula for finding the area of a circle: the square of the wire = the circumference of the circle (3.14) × the square of the wire diameter/4


    The cable size is also nominally squared, and the multi-stranded wire is the sum of the cross-sectional area of each wire. The calculation formula of the cable cross-sectional area: 0.7854 × the square of the wire radius (mm) × the number of strands such as 48 strands (each wire with a radius of 0.2 mm) 1.5 square wire: 0.785 × (0.2 × 0.2) × 48 = 1.5 square


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