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No neutral in Panel board for 3phase pumps that do not require a neutral

Dale Rogers

Hi all, on a recent EICR I have discovered a Panel board with no neutral but it is labelled for 3phase pumps only that do not require a neutral what are your thoughts on this matter? 

  • +1

    On the face of it I don't see a problem. In general there's no need to run a N conductor if there's nothing to connect it to - that's why they manufacture 3-core (brown/black/grey) +c.p.c. cables.

       - Andy.

  • 0 in reply to AJJewsbury

    This was my initial thought, just wondering if there is anything against running a sub mains with no neutral , thank you for the reply 

  • +1

    A 3-phase 4-wire system can be used to supply a 3-phase 3-wire portion of the installation. 

    It's purely a "nature of supply" issue.

    There is no requirement to distribute a neutral in a three-phase 3-wire system that is earthed at the star point (neutral) of the source.

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