Am currently doing a rewire and have a few questions please...
- (the main question!). I'm proposing the following circuits - does this plan sound sensible? BTW total floor area is 70m2; CU is a Volex split-load item: formatting link(Screwfix 82204). So:
Non-RCD protected: a) upstairs lights, 6A MCB, 1.5mm T&E cable b) downstairs lights, 6A MCB, 1.5mm T&E c) linked smoke alarms, 6A MCB, 1.5mm T&E d) downstairs ringmain feeding specifically the oven, fridge-freezer and gas combi boiler, 32A MCD, 2.5mm T&E cable
RCD protected: e) upstairs ringmain, 32A MCB, 2.5mm T&E f) downstairs ringmain - all sockets other than those in circuit (d) 32A MCB, 2.5mm T&E g) electric shower, 40A MCB, 10mm T&E
I expect circuit (d) to cause most comment?! I don't see the need for a dedicated cooker circuit because I'll be fitting a built-in single oven with 13A plug (plus gas hob), which could be plugged into an ordinary ringmain. OK?
- I've got some spare 1.0mm red/black cable which I'd like to use up - would there be any issue with me mixing-and-matching 1.0mm and 1.5mm cable within one installation (I don't have enough 1.0mm do do the whole house)?
- CU is under the stairs, which means that the route for all cables will be running under the stairs, in a straight line, at ~45deg, in the space created behind plasterboard attached to battens on the bottom of the stairs (clear?!.) Now, if the plasterboard were 'ceiling', that arrangement would unequivocably be perfectly OK; however if it were 'wall', it would definitely be unacceptable because the cables would be well within 50mm of the surface. What I'm unclear about is what does a
Thanks a lot David