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Three Phase Supply - Two Wire Load

I have a three phase distribution board and I am looking at the option of connecting my load across two live phases as there is no neutral required. With there being two phases used for this one load it is neither a single phase nor a three phase connection and I am finding it difficult to confirm/discover the correct formulas to use to identify fault current and voltage drop across my cable.



I believe the fault current would be calculated as:



With In being nominal and C values being correcting factors for environement...



Any other thoughts?








Iz    =        


sqrt(3) * In




 


2 (Ca * Cg)

 



Parents
  • Former Community Member
    0 Former Community Member
    If you are in the UK, then you have to design for a 16kA fault level, irrespective of calculation. See  IEE Regulation. 
Reply
  • Former Community Member
    0 Former Community Member
    If you are in the UK, then you have to design for a 16kA fault level, irrespective of calculation. See  IEE Regulation. 
Children
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