What is your point? A ring with conductors of greater CCC than the rating of the OPD is not a ring subject to any of the restrictions of 433.1.204.
New sockets off ring main
- Thread starter Spence129
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Well really that was my question too, aimed at John as he asked the initial quoted question.
I certainly do not disagree. All you have done is turned the red bit into the 'loop' of a a lollipop circuit (with no apparent advantage) - but it remains true that the red bits are totally compliant with BS 7671 (nothing in BS 7671 says that one can't turn a radial into a ring, but adding a 'return path', even if it achieves nothing useful) .
In case it's not clear, I will repeat the very simple point I was making - that a length of Method C 4mm² cable supplying multiple sockets and protected (somewhere) upstream with a 32A MCB is fully compliant with BS 7671 (per 433.1.1), regardless of what, if anything, is between the MCB and the 4mm² cable..
I think we may be back to the importance of electricians having a good understanding of basic electrical principles. If an electrician cannot understand why such a situation is compliant, then I probably wouldn't want him/her anywhere near my electrical installation, no matter what 'qualifications' they had!
Kind Regards, John
So you'd be happy with this arrangement too
Yes I totally agree we desperately NEED to get back to our electricians understanding what they are doing and not just blindly following the leader as so many do and it's demonstrated by how many idiots post videos of 'how good I am' on youtube. However that's the situation we have found ourselves in by the way so much emphasis is placed on having to follow the regs by H&S, insurance companies, laws etc. and the lack of apprenticeships.
I was talking to an ex squaddie a few months ago, been given my number for some advice!, he did a 6 day course on de-mob during which he became an electrician, realistically he passed enough exams to be classed as qualified having done negligible practical work but seemed to be very good at reading the book.
Oh yes the advice he was asking for... how to fit a RCBO in a CU.
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Of course I would (be happy that it was 'compliant', even though totally unnecessary). The bits you have added make absolutely no difference to the fact that my red bits are compliant. In fact, by reducing the current in some of my bits, you have made it 'even more compliant' with the spirit of 433.1.1 !
Kind Regards, John
Why wouldn't I be happy? None of the bits of cable you're adding detract in any way from the fact that the (red) wiring was 'compliant' without them'.
As I said, if your additional cables do anything, it is to make the entiity "even more compliant with the spirit of 433.1.1",since it reduces the current in some of the 'original' cables.
You seem to be implying that you see some 'problem' with the additions you are proposing - what are those perceived problems?
If one has some fully compliant radial circuit, would you see a problem with (unnecessarily) adding a cable from the final socket back to the CU? If so, again, what would that perceived 'problem' be?
Kind Regards, John
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