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Connecting up Sockets in either office or home

Former Community Member
Former Community Member
Hi All,

Was wondering best way to connect power to new set of 6 13A Double Sockets would it be best to use 63A RCD and 32A MCB with 2.5mm2 cable coming from MCB to the sockets I guess would you need 2 32A MCB's to have 3 sockets connected at any one time?.Then connect 16mm2 cable from the Main Power Source to the 63A RCD.The Power source consisting of 2x 4KVa Transformers and industrial sockets 110v,230v & 400v so Welders can work on the different floor levels (ie 2 Floors & Office on Ground).Also for lighting I assume its the same set up but with 6A MCB and 1.5mm2 Cable coming from the MCB.Jimmy
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    As has been stated the 6 double sockets must be on a ring with 2.5mm cable. Alternatives are 4mm cable on a radial, or 2.5mm radial on a 20A MCB.


    The lighting circuit does not need 1.5mm cable, 1.0mm is more than adequate.
  • 0
    OP has sent me the following.
    Hi there,


    I see the debate about the lights is still in full swing.

    Anyway away from lighting I have a small query in the way of size of cables as there are 5 cables (L1,L2,L3,N &E) that provide power to the Power Clusters that are on the structure each of which goto different floors respectively,as these Power clusters will be powering up Welding,Cutting and Milling Machines so was wondering if you would have an idea as to the size these input Power cables could well be.Jimmy



    I have replied requesting an explanation why this sort of thing cannot be asked in forum. private messaging completely defeats the idea of a forum, which is that we can all see the questions, and this avoids duplicated effort and irritation on our part.
  • 0
    And to show I am not a completely unhelpful barsteward, I have also answered the question.

    Yes;  I would have an idea about the cable sizing.
  • 0
    Probably out of sequence now, but another message from Jimmy -

     
    I believe the size of the cables (L1,L2,L2,N,E) where of a overall size of M12.If this helps

    Making a few guesses - such as if they're single core sheathed H07 flexible types - 12mm diameter would put them at around 16mm² (11.35mm according to Elland) or 25mm² (13.3mm dia) - although they'll be a bit of variation around those figures both by manufacturer and manufacturing tolerances. But far better to check what's upstream of them - there's always the possibility that they weren't correctly selected in the first place (or might not have their full rating available).

       - Andy.

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