Rewire layout, any thing to consider?

[cascas]

Been discussing a new rewire, (3 bed house), been suggested to lay out circuits as follows. Do people agree, or should any of the circuits be split (or combined?) or any suggestion from experience?


Upstairs Sockets - 12 Double - 32A
Upstairs Lights - x5 - 6A
Downstairs Sockets - 9 Double - 32A
Downstairs Lights - x5 - 6A
Cooker Hob / Oven - 32A
Kitchen - 5 Double + 5 Appliances - 32A
Outside Power - 32A

Should smoke alarm be fitted on a seperate 6A circuit, or on the downstairs light circuit. There have been arguments for both options?

Should an Intruder alarm, be connected to own MCB, or FCU spur socket?

Should Combi boiler, be connected to own MCB, or FCU spur socket?

 

[PrenticeBoyofDerry]

There are a few considerations Freezer and Combi on circuits that are not RCD protected. To protect the food from thawing and the pipes from freezing if the RCD trips and your away.
I would split the kitchen circuits and divide the load evenly for the appliances.
The smoke alarms can be fitted to lighting circuits if stand by power is supplied, again ideally not on a RCD but on a RCBO.
Intruder alarm can be spurred of a socket circuit.
Have you considered outside security lights?
Loft lights, sockets even, multi rooms.

 

[echoes]

I favour separating circuits as much as practical.

Maybe consider a separate 32A ring or radial circuit for your
kitchen appliances, or dedicated 16A circuits for them?

Consider multiple (per room-ish) 20A radial circuits for sockets - easier to test and extend.

32A for outside power seems overkill?

Dedicated circuit(s) (non-RCD if TN- earth) for Fridge, Freezer, Boiler

Smoke alarms are fine on a deicated circuit or a used lighting circuit.

Intruder alarm will be OK on an FCU, but MI's may state a dedicated circuit - if you have capacity, then prefer own circuit.

Leave a spare way in case of future expansion.

For example, I rewired using a 15 way CU as follows (TN-S): it may not be appropriate for you. My plan went through various iterations following suggestions by the good folk on here, and considering my house layout.

RCD1:
32A kitchen sockets + appliances radial (4mm method C)
32A oven & hob
20A lounge/diner sockets radial
6A upstairs lights, loft light

RCD2:
20A Bed 1 sockets radial
20A Bed 2 sockets radial
20A Bed 3 sockets radial
20A Garage sockets radial
6A downstairs lights

Non-RCD
16A Immersion
16A Intruder alarm
20A fridge/freezer/boiler radial
6A smoke/CO
6A garage/outside lights (RCBO)
SPARE

 

[ban-all-sheds]

Should smoke alarm be fitted on a seperate 6A circuit, or on the downstairs light circuit. There have been arguments for both options?

Should an Intruder alarm, be connected to own MCB, or FCU spur socket?

Should Combi boiler, be connected to own MCB, or FCU spur socket?

What does your electrician think?

Firstly, he will be the one declaring that his design complies with both the Wiring Regulations and the Building Regulations.

Secondly, why are you using an electrician who isn't sure how to do the design?