Individual RCBO

[heating12numpty12]

Hi
I need to check the electrical requirements (17th addition and Part P) for RCBO's on a new kitchen extension.

Do all the different circuits i.e Ring Main, Cooker, Hob, Smoke/Fire Detectors, etc require their own individual RCBO? Or is one single RCBO (30ma 100Amp) supplying all circuits acceptable?

 

[securespark]

How are the new circuits being connected to the supply?

Via the existing consumer unit or a new one?

 

[heating12numpty12]

How are the new circuits being connected to the supply?

Via the existing consumer unit or a new one?

So the new installation is within the existing consumer unit. The new circuits are 5 in total: Ring Main, Electric Oven, 2nd Electric Oven, Lights and Electric Hob.

 

[Taylortwocities]

This is notifiable electrical work because these are all new circuits. Shouldn't you be asking your CPS registered electrician?
Or are you contemplating the DIY option?

 

[stillp]

one single RCBO (30ma 100Amp)

Do you mean an RCD? RCBOs provide overcurrent protection, RCDs don't.

 

[flameport]

New circuits will require RCD protection. There are ways to avoid it on some circuits, but it's unlikely that they will be used.
An RCBO for each circuit is the proper option.
Many installations have one or two RCDs covering multiple circuits, but I certainly wouldn't install that. Other people might.

Why does the kitchen require it's own lighting circuit?

 

[heating12numpty12]

This is notifiable electrical work because these are all new circuits. Shouldn't you be asking your CPS registered electrician?
Or are you contemplating the DIY option?

Yes I understand that the work needs to be notified to the council. Not something that I would undertake, just wanting to be knowledgeable about the requirements.

 

[heating12numpty12]

Do you mean an RCD? RCBOs provide overcurrent protection, RCDs don't.

I believe I am talking about RCBO's as they provide over current protect and earth leakage.

 

[Taylortwocities]

the new installation is within the existing consumer unit. The new circuits are 5 in total: Ring Main, Electric Oven, 2nd Electric Oven, Lights and Electric Hob.

so.
How many RCDs, if any, are in the existing consumer unit ?

 

[heating12numpty12]

New circuits will require RCD protection. There are ways to avoid it on some circuits, but it's unlikely that they will be used.
An RCBO for each circuit is the proper option.
Many installations have one or two RCDs covering multiple circuits, but I certainly wouldn't install that. Other people might.

Why does the kitchen require it's own lighting circuit?

There are some 30 LED down lights on the lighting circuit.

So RCBO's for each circuit is the proper option, but may not be mandatory according to the electrical requirements, is that right?

 

[heating12numpty12]

so.
How many RCDs, if any, are in the existing consumer unit ?

Just one at present, 100 Amp at 30ma.

 

[securespark]

Upgrade the old unit to a brand new one with either multiple RCD's or RCBO's.

 

[SimonH2]

Many installations have one or two RCDs covering multiple circuits, but I certainly wouldn't install that. Other people might.

You are in a very very small minority as the majority of sparks I know, or have seen the work of, think "split board" is the standard way to do it. FWIW, I agree that all RCBO is by far the better option.

 

[EFLImpudence]

There is also, of course, the customer's wallet.