Wiring Diagram

I wish all customers supplied me with a diagram along those lines to work to.

There's a couple of unneeded lines where lighting cables are duplicated on the runs where one switch operates more than one luminaire; there are some unnecessary cable size step-up/step downs; the 16A MCBs could as well be 20A; and maybe some other bits I've not yet noticed (!).

But it's certainly understandable and able to be worked from.

 

Why the junction boxes?
They should not be required and the extra consumer units,use a properly sized 3 phase distribution board.

 

Junction boxes, however fat, should not exist on a new installation. Not best practise on an existing one and they need to be a special type if they are hidden/inaccessible.

Betty, I have spotted you posting the same diagrams and questions on at least two other electricians forums. Are you going to collect all of the responses, from all of the forums, and select the ones that fit in with your original idea?

 

RCDs or RCBOs?

With your "Loft" area having power and lights on a single RCD may not be the best idea - power trips and you have no light! And possibly split the other CU with lights on a separate RCBO.

Have you considered Triple sockets? Certainly where you will have a workbench - they can be very useful.

 

Not a problem. If you ask 3 electricians a question you are very likely to end up with more than one answer. I was just curious as to how you would sort the wheat from the chaff

 

Yes, and they may agree on here, as each respondent can see and (maybe) understand what each of them is saying. So a reply will be a concensus.
Respondents here will not be aware of input from other forums so you may get confused input. But that's fine if you can cope with that.

 

Your diagram shows lights in the rooms where you have loft sockets - am I missing something? And if you have sockets in the loft, what illumination will there be?

 

That explains it.

I would have drawn the loft rooms above the main drawing and annotated it as such with the wire going there.

Remember - what you think you might want today will be different to what you actually want tomorrow. As the work is being done now, it will be a minor increase to get a light circuit for the loft run in, even if it is left with wire coiled up and terminated in Wago connectors.

And still seriously think about getting the electrician to split the power and lighting load across RCDs or RCBOs. Even on the ground floor, taking out all power and leaving no lighting can be a nuisance.

 

I will still nag about putting lights on their own RCBOs ...

See you have one triple socket. think about a few more especially where there might be a workbench and a couple of chargers plugged in.

You also need to define the height of your sockets ... are they low level or are they above work top height? and if the latter, make sure they are well above.