Knowledge of square number of electronic wire harness and conversion method of diameter, common knowledge of small size cable;
There are three commonly used international standards for the specifications of electric wires: AWG, SWG and CWG.
A few squares is a nominal value stipulated by national standards, and a few squares is the user's choice of wires and cables according to the load of the electronic harness. The square number of wires is a verbal term in the renovation of hydropower construction. The number of square wires is often said without a unit, that is, square millimeters. The square of the wire actually refers to the cross-sectional area of the wire, that is, the area of the circular cross-section of the wire, in square millimeters. Generally speaking, the empirical load capacity is when the grid voltage is 220V, the empirical load capacity per square wire is about one kilowatt. Each square of copper wire can carry 1-1.5 kilowatts, and each square of aluminum wire can carry 0.6-1 kilowatts. Therefore, only one square of copper wire is sufficient for an electrical appliance with a power of 1 kilowatt. When it comes to current, the copper wire can carry 3A to 5A per square meter during short-distance power transmission. The heat dissipation condition is better to take 5A/square millimeter, and it is not good to take 3A/square millimeter.
Conversion method: know the square of the electronic wire harness, calculate the radius of the wire with the formula for finding the area of the circle: wire square number (square millimeter) = pi (3.14) x wire radius (mm) square
Knowing the square of the electronic wiring harness, 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 electronic harness, the square of the wire is also calculated by the formula for finding the area of the circle: the square of the wire = the circumference of the wire (3.14) × the square of the wire diameter/4 The size of the cable is also nominal with the square, and the multi-stranded wire is each The sum of the cross-sectional area of the wire.