Please provided formula for calculate the cable size from step up transformer to M.V panel, run overhead aluminum cables, total load is 5mega watt, total length 900 feet.
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Answer Posted / Harendra Kumar Mishra
See the answer for QNO 194379 for a detailed explanation and formula for calculating cable size using IEC 60228-1. The formula for the cross-sectional area (A) is: A = I / (J * π), where J is the current density, I is the total current (I = P / U = 5000000 W / 11000 V = 454.55 A), and π (pi) is a mathematical constant.
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