new kitchen ring from cooker supply?

[bruce999]

Hi.
I'm helping out a friend add a load of sockets in the kitchen (4doubles and 4 singles) as there is only 1 double currently. There is a cooker supply(no longer needed for cooker) which i think is 6mm cable with a 30A fuse at the consumer unit. Is it possible/recommended to create a ring beginning and ending where the cooker switch was using 2.5mm cable? Also will this have the capacity to power say kettle, fryer, microwave, steamer, washing machine etc at the same time?

 

[cozycats]

It seems to be recommended that you either
1 install a mini cu with a ring or

2 you use 2.5 Radials to the sockets (simplifies testing)

The connection point needs to be accessable.

 

[bruce999]

ok. Radials would be easier. So is it ok to connect 3 radials using 2.5mm cable into the 6mm using a junction box? What i can't understand about a radial circuit is: If i have say 3 double sockets on a radial and there's a kettle, fryer and grill plugged in this will mean around 7kw going through the 2.5mm which is too much.

 

[Adam_151]

If you are making it into a radial, you'll be needing to fuse it at 20A, I think what Mr Cats was suggesting is you make the 6mm into a submain, stick a mini CU on the end and run 16A/20A radials from that

You can stick a ring on the end of the 6mm cable, but it'll be a non conventional circuit and will complicate testing, and a note of it should be made on the cert. Turning the 6mm into a submain and running the ring from there would be a more elegant solution, just bear in mind that you won't get discrimination between the ring and submain breakers (which is why I presume radials from the submain were suggested)

Depending on installation method you could continue the cable in 4mm² and make it a 32a radial (if you need 6mm then very few sockets will take it, BS1363 doesn't require them to, think MK have been known to take 2x6mm though)

Or you could just extend your existing ring

Remember though that whatever you do, that this is notifiable work

 

[bruce999]

What do you mean by notifiable work?

 

[Adam_151]

What do you mean by notifiable work?

That you need to tell your local bilding control officier about it if you plan to comply with the building regulations

 

[Fratton sPark]

Bruce, I hope you have a crash helmet, or can hide behind your settee. With your last question about what constitutes notifiable work, I predict a barrage of replies about Part P. Many of which may be unhelpful/ derogatory. And some will say what I'm about to say. Please don't consider doing this job yourself.