Extending ring main methods

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I have extended my property with a new porch/utility room. I intend on extending my kitchens ring main and adding 4 new double sockets to the new room. The washer and dryer will be running from the new outlets.

Option 1 below is the desired arrangement, but my question is specifically about option 2 as this method would be preferable for me due to the layout of the existing rooms and sockets. Is option 2 acceptable under current building regs?

 
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I don't understand option 2 so option 1 it is.

If you can access all the ring wiring then replace it with a 4mm² radial.
 
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Option 1 is the only way to go. I am not quite sure what Option 2 is as it is nothing I have seen before, but it looks like a very odd radial circuit. Assuming that the line shown is one of the conductors (L or N)
 
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Option 2 is not an option.

The correct method is Option 1, and this complies with Wiring Regulations.

I can see why Option 2 might be easier (just adding some figure of 8's to the existing) but you obviously will need the same access to create both options. Option 1 only requires a couple of cables to be joined, and these could be inside the existing socket boxes.
 
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I preferred option 2 because this is how I have installed it (just not connected up yet). I have seen this layout elsewhere in my house, which was professionally rewired just after the part-p scheme came out. It was only when I stepped back and thought about it that it seemed wrong.

I suppose option 2 its equivalent to a 5mm² radial spur off the ring main.
 
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I suppose option 2 its equivalent to a 4mm radial spur off the ring main.
It actually looks to be effectively a 5mm² radial circuit, since it looks as if every socket is supplied by two 2.5mm² (I presume) cables in parallel. Bizarre though it looks when drawn as it has been, it therefore probably would be reg-compliant,wouldn't it?

Kind Regards, John
 
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It actually looks to be effectively a 5mm² radial circuit, since it looks as if every socket is supplied by two 2.5mm² (I presume) cables in parallel. Bizarre though it looks when drawn as it has been, it therefore probably would be reg-compliant,wouldn't it?
To be clear, and dependent upon exactly how the connections are effected, isn't it probably electrically equivalent to:

Kind Regards, John
 
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it therefore probably would be reg-compliant,wouldn't it?
I suppose it would - but some people think four conductors (six with a spur?) in a socket terminal are not allowed (or poor practice).

Would you advocate a 50A MCB?

It's just pointless.
 
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To be clear, and dependent upon exactly how the connections are effected, isn't it probably electrically equivalent to:
[net]158945/86266_46503735.jpg[/net]
[net]

Yes, your drawing illustrates option 2 more clearly.[/net]
 
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it therefore probably would be reg-compliant,wouldn't it?
I suppose it would - but some people think four conductors (six with a spur?) in a socket terminal are not allowed (or poor practice).
There is no spur proposed but, yes, that is the one possible catch. 4 x 2.5mm² conductors exceeds what is said in MIs for most/all sockets (they usually say 3 x 2.5mm² 'capacity'), but we know that is a bit odd, given that the MIs usually also say that there is 'capacity' for 2 x 6mm².
Would you advocate a 50A MCB?
I'm not sure that I would 'advocate' it but if someone proposed it, and if cable was all 'clipped direct' (and not grouped), I would probably find it hard to argue against it! That's assuming that the two parallel cable paths were of identical length - if not, it would get much more complicated and might not support a 50A MCB. In reality, one assumes thatthe OP would be more than happy with a 32A one!
It's just pointless.
Indeed. However, we seem to be being told that the OP has already 'done it', so the question is whether it needs to be 'undone'.

Kind Regards, John
 
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4 cables in each socket is going to be very crowded.

And pointless too as you are making the job harder for no reason.
 
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I will be re-doing it properly. Its on a new build and we haven't boarded it out yet so re-routing the conductors wont be to arduous.
 
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I have seen this layout elsewhere in my house, which was professionally rewired just after the part-p scheme came out.
Really?

Are you sure?


I have extended my property with a new porch/utility room.
What did you say, or by default agree, would be the way that compliance with Part P would be achieved?
 
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Can someone just clarify for me please, we are just extending a ring circuit to add two double sockets, yes?

Thanks,

DS
 

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