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  1. PowerDist1

    Sizing 3 Phase Service

    I am having issues with available amperage for three phase. Just wanted to confirm this: For a 400A switch gear (320A usable), 277/480V pole top installation, the individual transformers would need to be 100 kVA each? Assuming the full 320A is used, 320A*480V*1.732 = 266kVA 3 phase. So divide...

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