1 Operating temperature 30 °C, long-term continuous load current under 90% load is as follows: 1.5 mm 2 - 13A 2.5 mm 2 - 26A 4 mm 2 - 32A 6 mm2 - 47A16 mm2 - 92A 25mm2 - 120A 35 square millimeters - 150A 2 Current conversion power: 1A=220W, 10A=2200W, and so on. For example, if the current is 14A copper wire, it is: 220W×14=3080W, then the 1.5 square copper wire power is 3.08kW. National standard allowable long-term current: 4 square is 25-32A 6 square is 32-40A In fact, these are theoretical safety values, and the limit value is even greater than these. The maximum allowable power for the 2,5 square copper wire is 5500W. 4 square 8000W, 6 square 9000W is no problem. The 40A digital power meter has absolutely no problem with the normal 9000W. The mechanical 12000W will not burn. 3 Copper core wire allows long-term current: 2.5 square millimeters (16A to 25A) 4 square millimeters (25A to 32A) 6 square millimeters (32A to 40A) for example: 1, each computer power consumption is about 200 ~ 300W (about 1 ~ 1.5A), then 10 computers need a 2.5 square mm copper wire power supply, otherwise there may be a fire. 2. The air power consumption of the big three air conditioners is about 3000W (about 14A), then a single air conditioner needs a separate 2.5 mm2 copper core wire to supply power. 3, the current housing into the line is generally 4 square millimeters of copper wire, therefore, at the same time open the household appliances shall not exceed 25A (5500 watts), it was no use to replace the wires in the house to 6 square millimeters of copper wire Because the wire entering the meter is 4 square millimeters. 4. Early housing (15 years ago) The incoming line is generally 2.5 square millimeters of aluminum wire. Therefore, household appliances that are turned on at the same time must not exceed 13 A (2,800 watts). 5, household appliances with relatively large power consumption are: air conditioner 5A (1.2 horsepower), electric water heater 10A, microwave oven 4A, rice cooker 4A, dishwasher 8A, washing machine 10A with drying function, electric water boiler 4A. 90% of power-related fires are caused by joint heating, so all joints must be welded. Contact devices that cannot be soldered must be replaced within 5 to 10 years (such as sockets, air switches, etc.). 4 Copper core wire and cable current-carrying standard cable current-carrying capacity estimation estimate: Multiply the number by 9.5 and increase the number by 9. Thirty-five to three-by-five, and both teams lose five points. The conditions are changed and converted, and the high temperature 10% copper upgrade. The number of pipes worn was 234, and the full load was 876. Explanation: In this paper, the ampacity (safety current) of various types of insulated wires (rubber and plastic insulated wires) is not directly indicated, but is expressed by "multiply the cross section by a certain factor," and is calculated by mental arithmetic. “2 to 5 multiplied by 9 and up to a minus sign to go†refers to various cross-section aluminum core insulated wires of 2.5 mm2 and below, which have a current carrying capacity of approximately 9 times the number of sections. Such as 2.5mm2 wire, the current capacity of 2.5 × 9 = 22.5 (A). The multiple of the current-carrying capacity and the number of cross-sections of conductors from 4 mm2 and above is the row-up row along the line number, and the multiple is successively decreased by 1, ie, 4×8, 6×7, 10×6, 16×5, and 25×4. "Thirty-five-by-three and five points, both groups minus five," said 35mm2 wire carrying capacity is 3.5 times the number of sections, that is 35 × 3.5 = 122.5 (A). From a conductor of 50mm2 or more, the multiple relationship between the current carrying capacity and the number of sections becomes a group of two two line numbers, and the multiple is successively decreased by 0.5. That is, the current carrying capacity of 50 and 70mm2 wires is 3 times of the number of sections; the carrying capacity of 95 and 120mm2 wires is 2.5 times of the cross-sectional area, and so on. "Conditions are subject to change, high temperature 10% copper upgrade". The above-mentioned mouthpiece is a copper core insulated wire and the surface coating is determined under the condition of an ambient temperature of 25°C. If the aluminum core insulation wire is deposited in an area where the ambient temperature is higher than 25°C for a long time, the wire carrying capacity can be calculated according to the above formula, and then it can be used for 10%. When the aluminum wire is used instead of the aluminum wire, the copper core wire is used. Its ampacity is slightly larger than that of the aluminum wire of the same specification. The ampacity method can be used to calculate the ampacity of a line number larger than that of the aluminum wire. For example, the current carrying capacity of 16mm2 copper wire can be calculated by 25mm2 aluminum wire. High Speed Blender,Ipl Laser Hair Removal,Diy Laser Hair Removal,Best Ipl Hair Removal,Epilator Ipl SHENZHEN CHONDEKUAI TECHNOLOGY CO.LTD , https://www.szfourinone.com