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6mmT&E Radial - 2.5mm T&E Ring

Former Community Member
Former Community Member
Can I have an opinion please?


Now I fully understand this is not correct but struggling to code it.  I have just conducted an EICR on a domestic property.

The old cooker circuit (32A Type B on 30mA RCD) has at some part of its length, been turned into a very small 2.5mm final ring circuit. 

The end to end values would return an R1+R2 of 0.22 Ohms and the furthest socket back to the consumer unit has an R1+R2 of 0.41Ohms.

I know it's wrong, but cannot (apart from the connection being inaccessible) actually pinpoint how to code it and why.


Thoughts please?




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  • 0
    It is a lollipop/ lassoo  circuit, quite common in just this situation, even if  not one of the examples in the annex of BS7671..

    Not 'wrong' as such, and no  code required if done neatly; unless it is showing signs of thermal distress, given  as you have shown, the Zs and so on checks out.

    The same sort of rules that govern a ring apply, just the fuse is further back. you;ll do ring-round tests from a socket, but R2 back to the board.


    Of course if the joints are taped choc block and hanging out the wall then its a C2...

    Mike.
Reply
  • 0
    It is a lollipop/ lassoo  circuit, quite common in just this situation, even if  not one of the examples in the annex of BS7671..

    Not 'wrong' as such, and no  code required if done neatly; unless it is showing signs of thermal distress, given  as you have shown, the Zs and so on checks out.

    The same sort of rules that govern a ring apply, just the fuse is further back. you;ll do ring-round tests from a socket, but R2 back to the board.


    Of course if the joints are taped choc block and hanging out the wall then its a C2...

    Mike.
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