I intend to fit a built-in fridge and electric oven (one with a prefitted 13A plug). There will be a gas hob immediately above the oven.
The plan is to fit two 13A unswitched sockets below the worktop, immediately behind the oven and fridge units. The oven one will be a double socket to feed both the oven and the hob's electric gas igniter. Each socket will be controlled by a 13A FCU, above worktop height. These will be on the same ring main, with the cables dropped down from ceiling level, buried in the plaster. Sound OK so far?
Questions... First - in the case of the oven, obviously the FCU can't be directly above the socket if the socket is directly behind the oven, ie within the oven kitchen unit. It will be about 30cm to the right of it. Can I take the feed for the socket from the FCU vertically down to below worktop level, buried under the plaster, and from there emerge from the plaster within some conduit and traverse horizontally, to the socket? I realise horizontal cables are normally a no-no, but if they are running surface mounted behind kitchen units? Or is it normal practice to fit the oven socket vertically below the FCU (and therefore behind a cupboard) and have the oven flex wending its way round the back of the cupboard to plug in (which would be quite inaccessible).
Second - how much space is there usually at the back of these built-in units? Is there room to have surface-mounted sockets there? - on the basis that I don't see the point of recessing them if there's no need; and also because if I'm allowed to run horizontal surface-mounted cable behind the units, it would be a bit odd having this feeding flush-fitting sockets. Or do I just need to go buy my units and check?
Thanks for any advice David