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Is there a maximum length for a spur cable?

Former Community Member
Former Community Member
Good afternoon, hope you are all well.

Just two quick questions.

Is there a maximum length for a 2.5mm twin and earth spur cable terminated in a ring final wall socket?

Is there a maximum length for a 2.5mm twin and earth spur cable terminated in the Consumer unit RCBO which also supplies a ring final. I understand that there can only be one spur cable from the RCBO. So max three cables in RCBO. 


As always, many thanks in advance.

Simon

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  • 0

    Zoomup:




    AJJewsbury:




    It is unlikely that a spur will ever be too long in the average U.K. house.



    But might be if it's running down the garden to the shed....


     

     




    If it's running down the garden to the shed it is not IN the average U.K. house.


    Z.


     




     

    If we apply the old rule of no maximum number of sockets provided the area served by the ring main does not exceed 100 sq metres, then a spur within this ring main is unlikely to be so long as to cause a problem, so not official maximum length is necessary.


    A garden shed should not be served by a spur of a ring main in the house. It is a separate outbuilding so needs a single feed from the consumer board in the house. If it contains a mixture of lights and several power sockets, it needs its own consumer unit within.
Reply
  • 0

    Zoomup:




    AJJewsbury:




    It is unlikely that a spur will ever be too long in the average U.K. house.



    But might be if it's running down the garden to the shed....


     

     




    If it's running down the garden to the shed it is not IN the average U.K. house.


    Z.


     




     

    If we apply the old rule of no maximum number of sockets provided the area served by the ring main does not exceed 100 sq metres, then a spur within this ring main is unlikely to be so long as to cause a problem, so not official maximum length is necessary.


    A garden shed should not be served by a spur of a ring main in the house. It is a separate outbuilding so needs a single feed from the consumer board in the house. If it contains a mixture of lights and several power sockets, it needs its own consumer unit within.
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