adrianpaulwood
28th May 2008, 08:35 AM
I am replacing an existing standalone cooker, that connects on a cooker radial circuit via a cooker connection unit behind the cooker, and is isolated by a cooker control unit above the worktop to the right of the cooker. All cabling is all 6mm, and protected by a 30 Amp type B MCB (fitted by myself to replace a rewireable fuse holder).
This cooker is being replaced by a ceramic hob (5.4kw) and single oven (3.0kw). The hob will be hardwired with 6mm cooker cable into the cooker connection unit) and the 3.0kw single oven could either be hardwired to the connection unit (with 6mm cooker cable) or I could fit a 13 amp plug (with 2.5mm cable).
The kitchen is on the same ring main as the rest of the house, so given other kitchen appliances on the ring main, it wouldn't be a good idea to plug in the single oven to the ring main.
I would like to use the existing kitchen wiring in such a way that I don't have to notify the work or employ an electrician in order to fit this single oven and hob.
Ideally I would like to connect the oven to the cooker connection unit, along with the hob, so both can then be isolated via the cooker control and both are connected neatly behind the oven / hob. However, if I do this the instruction manual recommends that the cooker is protected by a fuse rated between 15 amp and 20 amp (or 13 amp if plugged in). That presumably can only be done by fitting a fused connection unit or single unswitched 13 amp socket between the cooker connection unit and the oven. I guess I'm not allowed to do that, because such changes would be notifiable?
I could solve this by plugging the cooker into the 13 amp socket in the cooker control unit - but this would be rather unsightly.
Would it be permissable (without notification) to replace the cooker connection unit (behind the cooker) with a 2nd cooker control (ccu) including socket? I could then connect the hob and oven to this 2nd ccu (the oven being plugged into the 13 amp socket on the ccu). Both could be isolated by the existing cooker control unit that is above the worktop to the right of the cooker. I've never heard of anyone doing this so I guess its not allowed, and it might be notifiable, but it would be a neat solution.
Note - unless I end up plugging the single oven into the 13 amp socket on the existing ccu (above the worktop), I will replace the existing ccu with a new ccu that has no socket, so as to avoid overloading the circuit and for general safety reasons.
Can anyone think of any other solution that would not be notifiable, would not require an electrician and would not mean connecting the oven to the ring main?
Given diversity calculations, the 30 Amp MCB and 6mm cabling should be sufficient I think, for the oven and hob (from what I have read). There is a small risk of nuisance MCB trips because if the oven and 4 hobs were run at full power, they would exceed 30 Amps. However, this is unlikely to be an issue for the way we use the oven and hob.
Thanks for any help and advice.
This cooker is being replaced by a ceramic hob (5.4kw) and single oven (3.0kw). The hob will be hardwired with 6mm cooker cable into the cooker connection unit) and the 3.0kw single oven could either be hardwired to the connection unit (with 6mm cooker cable) or I could fit a 13 amp plug (with 2.5mm cable).
The kitchen is on the same ring main as the rest of the house, so given other kitchen appliances on the ring main, it wouldn't be a good idea to plug in the single oven to the ring main.
I would like to use the existing kitchen wiring in such a way that I don't have to notify the work or employ an electrician in order to fit this single oven and hob.
Ideally I would like to connect the oven to the cooker connection unit, along with the hob, so both can then be isolated via the cooker control and both are connected neatly behind the oven / hob. However, if I do this the instruction manual recommends that the cooker is protected by a fuse rated between 15 amp and 20 amp (or 13 amp if plugged in). That presumably can only be done by fitting a fused connection unit or single unswitched 13 amp socket between the cooker connection unit and the oven. I guess I'm not allowed to do that, because such changes would be notifiable?
I could solve this by plugging the cooker into the 13 amp socket in the cooker control unit - but this would be rather unsightly.
Would it be permissable (without notification) to replace the cooker connection unit (behind the cooker) with a 2nd cooker control (ccu) including socket? I could then connect the hob and oven to this 2nd ccu (the oven being plugged into the 13 amp socket on the ccu). Both could be isolated by the existing cooker control unit that is above the worktop to the right of the cooker. I've never heard of anyone doing this so I guess its not allowed, and it might be notifiable, but it would be a neat solution.
Note - unless I end up plugging the single oven into the 13 amp socket on the existing ccu (above the worktop), I will replace the existing ccu with a new ccu that has no socket, so as to avoid overloading the circuit and for general safety reasons.
Can anyone think of any other solution that would not be notifiable, would not require an electrician and would not mean connecting the oven to the ring main?
Given diversity calculations, the 30 Amp MCB and 6mm cabling should be sufficient I think, for the oven and hob (from what I have read). There is a small risk of nuisance MCB trips because if the oven and 4 hobs were run at full power, they would exceed 30 Amps. However, this is unlikely to be an issue for the way we use the oven and hob.
Thanks for any help and advice.