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Cable entry metal consumer unit

Baldyhugh
Hi 


Just a quick query. I have a metal consumer unit to fit and the cables will be entering from the rear. There aren’t many circuits so was planning on having them all entering through one large knockout in the rear. My question is, is it acceptable to have the supply tails entering through the same knockout as the circuit cables or do the supply tails have to enter through a separate hole/knockout?


thanks in advance
  • Former Community Member
    0 Former Community Member
    TBH I cannot see a issue with that, but I'd wait for a couple of answers there's a wealth of experience in the forum. 

    Regards Ts
  • 0
    Perfectly acceptable, just grommet strip the knockout and if possible use a board with a tail clamp. Would also possibly seal the cable entry as well.
  • 0
    Baldyhugh:

    Hi 


    Just a quick query. I have a metal consumer unit to fit and the cables will be entering from the rear. There aren’t many circuits so was planning on having them all entering through one large knockout in the rear. My question is, is it acceptable to have the supply tails entering through the same knockout as the circuit cables or do the supply tails have to enter through a separate hole/knockout?


    thanks in advance


    Yes, it is permissible to have all cables entering from the rear through the one opening. It can be a workout for the hands though, bending the modern 25mm2 stiff tails.


    Z.


  • 0
    Regs wise just fine, bend radius may mean you may need a larger hole than you think, and plan carefully so you get a layout that does not involve something having an undignified loop the loop around the tails to reach its breaker....

    The other gotcha with entry behind generally is a  wire dropping down the hole and having to be fished out if the wall is hollow partition - depends where exactly things are held captive  -  to have a few P clips or similar at the ready may be helpful if the wall is just partition.

    Mike.

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