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Radial Circuit using box installation method...

Former Community Member
Former Community Member
I am curious if anyone has ever done this, and if not any reason?  Is it acceptable? 


So, the scenario is that you install a radial circuit for lighting or sockets for that matter (could apply to either in this instance), and the image I've attached as the example probably isn't the best, but it was the clearest image I could find. 


The example is as follows - you have a circuit coming from the CU on a 16amp radial, rather than just go from one to the other repeatedly could you not use a junction box installation method. As long as the box was accessible.  I know the image shows lighting etc, but I was not thinking of it like that in this instance, it would be either just lighting or just sockets. 

992563266d16340370be4f2ff3f68dde-huge-screenshot-2021-02-15-at-16.28.37.png1f339cb9468d38ac0d0749602b0dec82-huge-screenshot-2021-02-15-at-16.42.16.png


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  • 0
    Timeserved:

    You can have a single socket cabled in 2.5mm from a 4mm cabled socket has long as the 2.5mm cable is clip direct which gives it a 27A rating given that a single socket will only ever be loaded to 26A max limited by the 13A fuses in the plugs. So the deciding factor is the installation method and cable derating factors as far has I'm aware ?. 


    Or you have your row of sockets above the kitchen counter. From there you take a length of 2.5 mm² via a switch to a single unswitched socket underneath for the dishwasher, washing machine, or WHY. One appliance, max 13 A. (Not forgetting of course that a double 13 A socket-outlet is still rated at 13 A for the pair.)


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  • 0
    Timeserved:

    You can have a single socket cabled in 2.5mm from a 4mm cabled socket has long as the 2.5mm cable is clip direct which gives it a 27A rating given that a single socket will only ever be loaded to 26A max limited by the 13A fuses in the plugs. So the deciding factor is the installation method and cable derating factors as far has I'm aware ?. 


    Or you have your row of sockets above the kitchen counter. From there you take a length of 2.5 mm² via a switch to a single unswitched socket underneath for the dishwasher, washing machine, or WHY. One appliance, max 13 A. (Not forgetting of course that a double 13 A socket-outlet is still rated at 13 A for the pair.)


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