Wire square

Wire square refers to the cross-sectional area of wire conductor. Generally, it does not include its insulation layer, but only the internal copper wire or aluminum wire, and the wire is circular, that is, the area of its circular cross section, in square millimeters as its unit. If you know the square of the wire, you can calculate its cross-sectional area through the circular area formula.    The wire square is specified according to the national standard. In order to distinguish it in life, the load of the wire is generally divided by several square meters. The square meter of the wire is equal to the circumference 3.14 times the square of the wire radius. Knowing the square of the wire, you can calculate the wire diameter. The diameter of the wire into 2.5 square meters is 2.5 divided by 3.14 equals 0.8, and the square root is 0.9 mm, so the diameter is 2 times 0.9 mm equals 1.8 mm. Knowing the diameter of the wire, you can also calculate the square of the wire, for example, the square of the wire is equal to the circumference 3.14 times the square of the wire diameter 4 percent.

Square calculation method of cable and wire

Understand the square meter of the cable, and calculate the half diameter of the cable using the formula for calculating the ring area: Square number of wires (mm2)=pi (3.14) × Square meter of cable half diameter (mm). Understand the square meter of the cable, and calculate the diameter of the cable as well, such as: The wire diameter of 2.5 square cable is: 2.5 ÷ 3.14=0.8, and then the root number is 0.9mm, so the wire diameter of 2.5 square cable is: 2 × 0.9mm＝1.8mm. Understand the diameter of the cable, and calculate the square meter of the cable using the formula for calculating the ring area: Square meter of cable=pi (3.14) × Square meter of wire diameter/4. The cable size is also allowed in square meters, and the multi-core wire is the sum of the diameters of each cable.

Calculation method of cable section

zero point seven eight five four × Square meter of cable diameter (mm) × Number of shares. For example, 48 strands (0.2mm in diameter for each strand of cable) of 1.5 square meters: zero point seven eight five four × （0.2 × 0.2） × 48=1.5 square meters. Calculation and correlation of wire square and current quantity. 2.5 mm2 copper power plug safety cable ampacity - 28A. Safety of 4 mm2 copper power plug cable current carrying capacity - 35A. Safety of 6 mm2 copper power plug cable ampacity - 48A. Safety of 10 mm2 copper power plug cable ampacity - 65A. Safety of 16mm2 copper power plug cable current carrying capacity - 91A. The safety of the 25 mm2 copper power plug is 120A. For aluminum coins, the cable diameter should be 1.5-2 times that of copper core wire. If the electric flow of copper core wire is lower than 28A, there is no doubt that it is safe to take 10A per square millimeter. If the electrical flow of copper core wire exceeds 120A, it is taken as 5A per square millimeter. Cable inquiry cable wire square meter method.

Calculation method of cable wire square

A few square meters is a tolerance required by national industry standards, and a few square meters is the customer's choice of cable and wire according to the load of cable and wire. The square meter of the cable is actually the cross-sectional area of the cable, that is, the total area of the circular section of the cable. The enterprise is square millimeter. 1. For the whole bundle of new lines, the surface of the package will be marked with cable TV, clearly indicating the well-known brand, model and specification, cable diameter (square meter of cable). 2. Some well-known brands of cable sheath are printed with famous brands, models and specifications, cable diameter (square meters of cable).  3. For unmarked cables, experienced welders can estimate the square meters of cables.  4. For people without work experience, if they want to distinguish the size of the cable (square meters), they can use a vernier to accurately measure the diameter of the cable, and then calculate the cross section.