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transformer fault

  1. jar546

    Tap Rules for Conductors

    Where on this photo do you see where the tap rules apply, if at all? This is a step up transformer 208 3ph primary to 400/231 secondary to run a machine made in Europe. Thoughts?
  2. jar546

    Calculating Fault Current

    I noticed that on good prints from a more respectable MEP firm, they normally provide the calculations for fault current on new construction but not as often on renovation jobs. NEC 110.9 and 110.10 are pretty clear but 110.24 is relatively new the past 3 code cycles and often overlooked for...
    • jar546
    • Thread
    • fault current isca secondary voltage transformer fault
    • Replies: 15
    • Forum: Electrical Codes
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