Cooker Control Unit, etc.

phykell · 13 Dec 2004

Hi,

Can someone give me an overview of how best to connect up a cooker physically? I've got no problem with the cabling, etc. but I do need to connect up an electric oven and a hob and while I have what is described in one place as a cooker switch socket, and another, a CCU, there is also the cooker outlet plate. Am I right in assuming that the cable from the CCU (the switch with socket) goes to the cooker outlet plate and the cable to the cooker exits the plate? If that is so, do I need to provide one for the hob and one for the oven or can I have two cables exiting the cooker outlet plate?

Thanks for any help!

smurf59 · 13 Dec 2004

You need to check the outputs for the cooker and hob. Often cookers (without hob) now come fitted with a 13 amp plug..its the hob that needs the higher fuse rating.
Check the cabling for the cooker and the fuse rating for the hob. If the hob needs (say) 30 amp's i.e. is about 7kw max output and the existing cooker connection meets this requirement, then I would suggest fitting the hob to what was the cooker outlet.
If the oven is 13amp (does it have a plug already on?, then this can go into an existing socket.
However, for cosmetics then you might want to fit a further isolating switch and run this to to a dedicated socket for the oven, out of sight.
You could run this as a spur from the cooker CCU (now running the hob) if you have can do so within the total ampage, but better to leave the hob as a stand alone with an appropriate fuse raing and run the oven of a spur from the ring main. need here though to think about other appliances and what will be the maximim usage. If possible you could run a dedicated radial for the oven and use a cable of a higher rating (say 6mm). That way if anyone fits a higher rated appliance later, they wont have to rewire

phykell · 13 Dec 2004

Sorry, I'm installing a completely new circuit. I have the new CCU and I want to be able to disable the cooker and the hob with the switch on the CCU. What I need to know is how to exit the cable from the CCU. I don't want to just exit the cable from the plastered wall like the previous installation did. Do I therefore need the cooker outlet plate for this purpose?

brown-nought · 13 Dec 2004

Yes. Just remeber the permitted route regs.

dingbat · 13 Dec 2004

brown-nought said:
Yes. Just remeber the permitted route regs.

Which, for builders (and presumably, therefore, building inspectors also) seems to be a diagonal run every time!!

I have never come across a regs compliant run from CCU to outlet, even in new builds, that I haven't put in myself!

However, given that a dogleg is out of the question, unless the outlet is directly below the control unit a straight run between what are clearly related accessories does have a certain logic.

plugwash · 13 Dec 2004

dingbat said:
However, given that a dogleg is out of the question, unless the outlet is directly below the control unit a straight run between what are clearly related accessories does have a certain logic.

why is a dogleg out of the question?

dingbat · 13 Dec 2004

plugwash said:
why is a dogleg out of the question?

Okay, you could dogleg via, say, a blanked-off back box, but otherwise you can only run concealed cable in straight horizontal or vertical routes from/to/between accessories unless you use heavy-duty mechanical protection or bury them deep.

plugwash · 13 Dec 2004

i don't see why you would need a box at the corner point

vertiacal from accessory 1 horizontal from accessory 2 bend in the middle would be perfectly within permitted routes

dingbat · 14 Dec 2004

plugwash said:
vertiacal from accessory 1 horizontal from accessory 2 bend in the middle would be perfectly within permitted routes

I can't find a reference, but I am pretty certain that what you suggest is generally frowned upon; it's bad enough that most people are unaware of permitted routes anyway without introducing changes of direction.

Anyway, let's not fall out over it.

plugwash · 14 Dec 2004

running horizonally in general is frowned opon by many sparks (and some have been under the impression that its banned)

but i've never seen it suggested by any reputable source that doglegs between the safe zones from the two accessories beign connected are disallowed.

securespark · 14 Dec 2004

Surely H & V from and to accessories is fine?

phykell · 14 Dec 2004

brown-nought said:
Yes. Just remeber the permitted route regs.

Thanks, just to verify then (about to order parts)

I'll connect the hob to a cooker outlet plate then and the oven (a single oven only) to a fused spur. Both the outlet plate and the fused psur will be fed from the switched cooker control unit.

Does this sound reasonable?

Thanks

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Cooker Control Unit, etc.

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