Unbalanced/Balanced Loads and Neutral sizing?

Discussion in 'General Electronics Chat' started by keeby371, Apr 9, 2013.

  1. keeby371

    Thread Starter New Member

    Apr 9, 2013
    I have a 3 phase system that requires the use of numerous 3 phase and 1 single phase device therefore a neutral is required on the system. That said the system is being supplied through a slip ring. My question is if the main 3 phase load needs to accomodate 80A does the Neutral need to be sized the same or can it be smaller as there is only a requirement for a 1 off single phase supply using one of the 3 phases of 4amps?
  2. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    Code provides that the neutral may be sized for the load. This implies that the load is serviced with an appropriate overcurrent device.