Answer / Reetika Yadav

Designing the body earth cable (copper conductor) size for a 60kVA UPS involves calculating the required cross-sectional area to handle the expected fault current. You can follow these steps:n1. Determine the maximum fault current in kA for the given UPS system.n2. Select appropriate cable types based on their current carrying capacity, insulation, and mechanical properties.n3. Calculate the required cross-sectional area (mm^2) using the formula A = I^2 R / S^2 where I is the fault current in kA, R is the resistance per unit length of the cable (ohms/km), and S is the allowable heating rate (oC/kW/m).n4. Choose a suitable copper conductor size based on the available standard sizes and the calculated cross-sectional area.

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