How is the size used for specialty cables calculated?

The relationship between wire, current, and square The specifications for wire are commonly used internationally in three standards: American (AWG), British (SWG), and Chinese (CWG). How many squares is a nominal value specified by the standard, how many squares is the user according to the load of the wire and cable to choose the wire and cable. The number of square wires is a verbal term in the decoration of plumbing and electrical construction, often said how many square wires are not added to the unit, that is, square millimeters. The square of the wire is actually marked by the cross-sectional area of the wire, that is, the area of the circular cross-section of the wire, the unit is square millimeters. Generally speaking, the empirical load capacity is when the grid voltage is 220V, the empirical load capacity of each 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 an appliance with a power of 1 kW will only need one square of copper wire. Specific to the current, short distance power supply generally copper wire per square can carry 3A to ** current. Heat dissipation conditions are good to take ** / square millimeter, not good to take 3A / square millimeter. Example: a single piece of power consumption of 3000 watts / hour of electrical appliances should be used when the theoretical current is: 3000 (watts) ÷ 220 (volts) ≈ 13.64 (amps) theoretically closest to the actual should be 3 square millimeters of copper wire, but due to the production of 3 square millimeters of copper wire, so the actual application of 4 square millimeters of copper wire should be taken. Conversion method: know the square of the wire, calculate the radius of the wire with the circular area of the formula: know the square of the wire, calculate the diameter of the line of the formula: know the diameter of the wire, calculate the square of the wire is also used to seek the circular area of the formula to calculate: the size of the cable is also nominal square, multi-stranded wire is the cross-section of each wire and the sum of the area. The formula for calculating the cross-sectional area of the cable: 0.7854 × wire radius (mm) of the square × number of shares, such as 48 shares (each share of wire radius of 0.2 mm) 1.5 square line: 0.785 × (0.2 × 0.2) × 48 = 1.5 square, a general copper conductor flow conductor safety capacity is based on the allowable core ** temperature, cooling conditions, laying conditions to determine.　General copper conductor safety load capacity of 5 ~ 8A / mm2, aluminum conductor safety load capacity of 3 ~ ** / mm2. General copper conductor safety load capacity of 5 ~ 8A / mm2, aluminum conductor safety load capacity of 3 ~ ** / mm2.-2、About BBC Electronic Products Network platform related to the introduction and sales of products briefly: BBC Electronic Products Network - a professional agent / production / sales of a variety of {connectors | wiring harness | wire and cable products }; if you have a related [connectors | wiring harness | wire and cable products] procurement / purchasing needs or would like to buy / to understand which connectors | wiring harness | wire and cable product solutions that we can provide, please contact our Division below! Business personnel; If you have related [connectors | harness | wire and cable products] sales / resources and promotion needs, please click on the "→ Business Cooperation ←" and special people to discuss!