Basic CCU Installation.

Only1harden · Apr 5, 2013

Hi, Can you help me with the neutral arrangement an a CCU?

I've just finishing a level 2, done a 17th, and got a part p next week, getting stuck right in but as you know its all legislation and frustratingly little actual wiring!!!!!!!! So im trying to educate myself on the side.

The supply seems pretty straight forward. (line in to main switch which feeds RCDS, which in turn feeds 2 busbars, which feed the MCBS.)

But the separate neutral bars, 2 neutrals from 1 RCD, ect..... Im lost.

or perhaps if anyone knows any good books or websites for circuits more advanced than an obsolete baton lamp holder on a 1x1 meter board!!!!

Any help much appreciated.

(Will work for free to get the knowledge!)

Octopus · Apr 5, 2013

Sounds a very complicated Cooker Control Unit!

Only1harden · Apr 5, 2013

God damned iPhone keyboard (lol)

babylonsBurning · Apr 5, 2013

Hi only,
Not sure why you have two neutrals from 1 RCD.
All consumer units that i have recently installed come with a diagram on how to configure the board for different scenarios.
The usual set up (high integrity) is a main switch where you would connect you meter tails or submain etc to the incoming side.
The neutral on the outgoing (likely to be prewired from factory), will go to a neutral bar, this neutral bar will then have two other neutrals
that feed two RCDs, the outgoing neutrals will feed two separate neutral bars, these two RCDs have a live from the main switch which will be typically linked.
So on this set up u will have 3 neutral bars. 1 for unprotected RCD circuits and 2 others for the RCD protected circuits.
This set up is for the high integrity type, there are other variants.
Have a look at this PDF there are some diagrams with typical setups.

http://www.denmans.co.uk/downloads_public/17th_mk.pdf

Keep in mind how an RCD works, this is why you need 2 neutral bars when you have two RCDs.

markc123 · Apr 5, 2013

Im lost from your explanation.

What's wrong with 2 neutral bars...how can they be 2 neutrals from the one RCD?

One neutral bar is for one RCD, and the other is for the other. Don't mix the neutrals up or your RCDS will never stop in.

Post a picture, that may be a help...

monkster · Apr 5, 2013

Think the op means that two neutrals terminate at incoming side of rcd which feeds both if that makes any sense

Guitarist · Apr 5, 2013

These neutrals are tricky things, ask any builder, as they just stick everything on the main switch side once the RCD starts tripping...

telectrix · Apr 5, 2013

basics. RCD1 outgoing N feeds N bar 1. this is the N bar for the MCBs connected to RCD1. for RCD2, as 1, but substitute 2 for 1. other than that, fit box with the writing on the RCDs right way up.

KAS1 · Apr 5, 2013

This is the trouble with the trade, you're lost on this, how on earth can you be let loose on the public after the part P scam thing. I hope you are working for a company then at least you can ask someone at work.

Only1harden said:
Hi, Can you help me with the neutral arrangement an a CCU?

I've just finishing a level 2, done a 17th, and got a part p next week, getting stuck right in but as you know its all legislation and frustratingly little actual wiring!!!!!!!! So im trying to educate myself on the side.

The supply seems pretty straight forward. (line in to main switch which feeds RCDS, which in turn feeds 2 busbars, which feed the MCBS.)

But the separate neutral bars, 2 neutrals from 1 RCD, ect..... Im lost.

or perhaps if anyone knows any good books or websites for circuits more advanced than an obsolete baton lamp holder on a 1x1 meter board!!!!

Any help much appreciated.

(Will work for free to get the knowledge!)

Guitarist · Apr 5, 2013

KAS1 said:
This is the trouble with the trade, you're lost on this, how on earth can you be let loose on the public after the part P scam thing. I hope you are working for a company then at least you can ask someone at work.

Agree that too many are "learning" on the general public. Makes me so sad when I see what some householders have paid good money for.

GLENNSPARK · Apr 5, 2013

Guitarist said:
These neutrals are tricky things, ask any builder, as they just stick everything on the main switch side once the RCD starts tripping...

o aye...once you start talking about imballance..one of these comes out:

trev · Apr 6, 2013

Please tell me this job is in your own home

TaffyDuck · Apr 6, 2013

I am hoping this is another wind up. Surely 17th edition means you understand how to wire a consumer unit up? Doesn`t it?

If you dont know, then you have one hell of a lot to learn before you get let loose on a unsuspecting public.

DPG · Apr 6, 2013

Go easy on him guys, he's only asking and trying to learn. Where has he said he's doing a job for anyone anyway? Daz

KAS1 · Apr 6, 2013

Go easy !!!!!!!!!!!!!!!! he's said "I've just finishing a level 2, done a 17th, and got a part p next week, getting stuck right in but as you know its all legislation and frustratingly little actual wiring!!!!!!!! So im trying to educate myself on the side." Does that mean after next week hey presto another spark lol

QUOTE=DPG;751489]Go easy on him guys, he's only asking and trying to learn. Where has he said he's doing a job for anyone anyway? Daz[/QUOTE]

Basic CCU Installation.

Only1harden

Octopus

Only1harden

babylonsBurning

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markc123

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monkster

Guitarist

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telectrix

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KAS1

Guitarist

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GLENNSPARK

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trev

TaffyDuck

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