Rewiring in the kitchen

[bamboo]

Hello

Newbie here so I apologise in advance if the answer to this is simple....
We're planning to rewire our house and I am at the (early) stage of drawing up each individual circuits. My query is with the kitchen sockets circuit - I have seen examples of where this is placed under the RCD section of the CU. Should a fault occur and the electricity is switched off, this would leave you without power to the fidge freezer. Should this circuit be placed under the non-RCD part of the CU?

Thanks for your help.

 

[Steve]

If you have capacity, put a socket on its own 20A radial on the non-rcd side of the CU, for the fridge freezer. Or spur from an adequate non-protected circuit (upstairs ring main?)

 

[ban-all-sheds]

In terms of what circuits to have, the items on the list below may not all apply to you, but they are worth looking at to get you thinking:

1. Upstairs sockets
2. Downstairs sockets
3. Kitchen sockets
4. Circuit for appliances
5. Cooker circuit
6. Non-RCD circuit for F/F
7. Non-RCD circuit for CH boiler
8. Dedicated circuit for hifi
9. Dedicated circuit for IT equipment
10. Upstairs lights
11. Downstairs lights
12. Loft lights
13. Immersion heater
14. Shower
15. Alarm
16. Supply for outside lights
17. Supply for garden electrics
18. Supply for shed/garage

Plus any peculiarities brought about by your house layout & construction - e.g. in mine because of solid floors and where the rest of the sockets are, I have a radial just for one socket in the hall, the doorbell and the porch lights.

Plus a few spares on RCD & non-RCD sides for expansion beyond that for future unforeseen needs.

 

[Pensdown]

.....and in an ideal world a loft light circuit.

Feeding the loft light from the upstairs lighting circuit is all well and good until you either a have fault or you want to make alterations to the upstairs lighting then it’s back to a torch. If you cant get a separate cct your better off feeding it from the ground floor lighting

 

[ban-all-sheds]

.....and in an ideal world a loft light circuit.

Feeding the loft light from the upstairs lighting circuit is all well and good until you want to make alterations to the upstairs lighting then it’s back to a torch.

That's a good idea - I'll change my list.

If you cant get a separate cct your better off feeding it from the ground floor lighting

But not both, as in my case.

Ouch.

 

[Adam_151]

But now there are 18, you'll struggle to find a split board big enough without using MKs stacking kits or similar, or just sticking two split load boards next to each other fed from a common isolator

Though I'd be tempted to use a non split with RCBOs, but that would eat into the budget a fair way

Maybe its time for a new thread "designing the prefect electricial system"

 

[Pensdown]

Do I detect a diverse loft lighting installation?

 

[ban-all-sheds]

But now there are 18, you'll struggle to find a split board big enough without using MKs stacking kits or similar, or just sticking two split load boards next to each other fed from a common isolator

Do I detect a diverse loft lighting installation?

No - borrowed neutral.

 

[Steve]

But now there are 18, you'll struggle to find a split board big enough without using MKs stacking kits or similar, or just sticking two split load boards next to each other fed from a common isolator

You dont want 2 split load boards. Use one board with a main switch (OR appropriate time delay RCD in the case of a TT system) as the incomer. And the other board would have a 30mA RCD as the incomer. This could give you a lot to room to work inside the boxes too, and a lot of redundancy.

Alternatively, get a 3 phase board with a single phase converter and a bunch of RCBOs. Very expensive option.

 

[JohnD]

A Memera 2000 AS14014HED should be ample.

(14 ways through isolator 14 through RCD. Though personally I would prefer the RCBOs.