导线载流量计算（Ampacity calculation of conductor）.docVIP

导线载流量计算（Ampacity calculation of conductor） The choice of wire diameter The wire carrying capacity and wire section, or material type and wire laying method and environmental temperature and so on, there are many factors affecting the complicated calculation. The carrying capacity of various wire can usually be found in the manuals. But the use of formulas with some simple arithmetic, can be calculated directly, without look-up table. 1. formulas of aluminum core insulation wire section carrying capacity and multiple relationship 10 five, 100 two, 25, 35, four, three,. 70, 95, two and a half times. Through pipe, temperature, eight or nine fold. Add half bare. Copper is upgrade. 2. formulas for various section carrying capacity (ANN) is not directly pointed out, but with the section multiplied by a certain multiple representation. This will be our common wire nominal section (mm2) are arranged as follows: 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185...... (1) pointed out that the first sentence rhymes aluminum core insulated wire carrying capacity (ANN), according to the times of calculation section. The formulas in Arabia digital said the conductor section (mm2), Chinese characters digital times. The formulas of section and multiple relationships arranged as follows: From 1 to 1016, 2535, 5070, 95120 Five times four times three times two times two times Now more and more clearly the control formula, formula 10 under five refers to the section below 10, carrying capacity is five times the value of cross section. 100 two (read 100 two) refers to the section of ampacity is two times more than 100 section numerical. Section 25 and 35 is the boundary between the four and three times. This is the formula 25, 35, four realms . While section 70, 95 to two point five times. From the above arrangement can be seen: in addition to below 10 and 100 above, the wire section is in the middle of each of the two specifications are of the same kind of multiples. Fo