电缆流量与截面的倍数关系口诀（The cable section flow and multiple relation formula）.docVIP

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电缆流量与截面的倍数关系口诀（The cable section flow and multiple relation formula）.doc

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电缆流量与截面的倍数关系口诀（The cable section flow and multiple relation formula） 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, Tube, temperature, eight or nine fold. Add half bare, Copper upgrade. 2. formulas for various section carrying capacity (ANN) is not directly pointed out, but with the section multiplied by a certain multiple representation. For this reason, the nominal sections (mm2) of our usual wires are arranged as follows: 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70,, 95, 120, 150, and 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: 1 to 1016, 2535, 5070, 95120 or more }}}}} 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 on two (read hundreds of two) refers to the cross section of more than 100 of the carrying capacity is two times the value of the cross-section. A cross section of 25 and 35 is four times and three times the dividing line. This is the formula 25, 35, four realms . And the cross section 70 and 95 is two point five times. As can be seen from the above arrangement, except for 10 and over 100, the cross section of the middle wire is of the same number as each of the two specifications. For example, aluminum core insulation line, the ambient temperature is not greater than 25 degrees of temperature calculation of the carrying capacity: When the cross section is 6 mm2, the ampacity is 30; When the cross section is 150 mm2, the ampacity is 300; When the cross section is 70 mm2, the ampacity is