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『Calculation formula for current carrying capacity of copper wire』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
1. Current carrying capacity table for copper wires with different diameters (less than 1 millimeter)
The current carrying capacity table for copper wires with different diameters can refer to the following calculation methods and results:
1. Calculation method: The current carrying capacity of copper wires can be calculated by their cross-sectional area and current density, with the formula: I=J × S. The value of current density J will vary depending on different application scenarios. For transformers, J is usually taken as 2.5; For transmission lines, the value of J will be higher, usually above 5. Here, in order to obtain a relatively conservative and safe estimate of current carrying capacity, we can assume J=5 for copper wires below 1 millimeter.
2. Current carrying capacity meter: 0.1 square millimeter copper wire: current carrying capacity I=5 × 0.1=0.5 ampere 0.2 square millimeter copper wire: current carrying capacity I=5 × 0.2=1 ampere 0.3 square millimeter copper wire: current carrying capacity I=5 × 0.3=1.5 ampere 0.4 square millimeter copper wire: current carrying capacity I=5 × 0.4=2 ampere 0.5 square millimeter copper wire: current carrying capacity I=5 × 0.5=2.5 ampere 0.6 square millimeter copper wire: current carrying capacity I=5 × 0.6=3 ampere 0.7 square millimeter copper wire: current carrying capacity I=5 × 0.7=3.5 ampere 0.8 square millimeter copper wire: current carrying capacity I=5 × 0.8=4 ampere 0.9 square millimeter copper wire: current carrying capacity I=5 × 0.9=4.5 ampere. Please note The upload flow meter is calculated based on the assumption of a current density of J=5. In practical applications, it may vary depending on the specific usage environment and conditio
2. What is the basis for calculating the current carrying capacity of copper wire?
A 1 square meter wire can load 3kw (single-phase) or 7kw (three-phase). According to the mnemonic, the current carrying capacity of aluminum wire below 2.5 square meters is 9 times that of its cross-section. According to the copper wire upgrade calculation, 1 square copper wire is equivalent to 1.5 square aluminum wire, so the current carrying capacity of 1 square copper wire is 13.5A (1.5x9=13.5A). The current carrying capacity of a square copper wire can also be found in the table below. When the ambient temperature is 25 ℃, the current carrying capacity of 3-core 1 square copper wire is 14 A, which is consistent with the above calculation. The general method for calculating the safety of copper wire is as follows: the safe current carrying capacity of a 2.5mm ² copper power line is -28A. The safe current carrying capacity of a 4mm ² copper power line is -35A. The safe current carrying capacity of a 6mm ² copper power line is -48A. Power P=voltage U x current I=220 volts x 18 amps=3960 watts. The cable current carrying capacity refers to the amount of current that a cable line passes through when transmitting electrical energy. Under thermal stability conditions, the cable current carrying capacity when the cable conductor reaches the long-term allowable working temperature is called the cable long-term allowable current carrying capacity. The current carrying capacity of a wire is related to the wire cross-section, as well as the material, model, laying method, and