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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
    A ring final circuit is defined in BS 7671 as  "a final circuit arranged in the form of a ring and connected to a single point of supply", and 433.1.204 allows accessories to be supplied via a ring circuit with >=2.5mm, 30/32A protection etc. Since the load end of the 6mm cable could count as a single point of supply, that seems to tick all the boxes.
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  • 0
    A ring final circuit is defined in BS 7671 as  "a final circuit arranged in the form of a ring and connected to a single point of supply", and 433.1.204 allows accessories to be supplied via a ring circuit with >=2.5mm, 30/32A protection etc. Since the load end of the 6mm cable could count as a single point of supply, that seems to tick all the boxes.
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