Answer / 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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