2 supplies, one board

DNS1 · Jul 18, 2013

Talked about this on here a while back, but can't find the thread!

Registering with ELECSA and going to replace my own DB for the inspector...

I've currently got 2 15th Ed boards, one 4 way for the economy 7 and one 6 way for the standard supply.

Thinking about replacing with a single board with 2 main switches, one for each supply, and each feeding an RCD and it's respective circuits (small flat).

I'd be happy to do this any other time, labelling the board suitably so people don't get caught out by the 2 supplies, but concerned that it might be a little unorthodox for an inspection...

What does everyone think?

I know there are purpose built DBs available for this, but they seem quite overpriced in comparison by buying a bog standard 12 way board and an additional main switch.

mtfpuk2011 · Jul 18, 2013

I just pulled a new a ring circuit in for my assment the guys are dow to earth who do it so up to u

Geoffsd · Jul 18, 2013

Yes, I've done that and used for an assessment - no problem.

As you say, label it well or you could fit a 4 pole isolator.

Richard Burns · Jul 18, 2013

You are making modifications to a consumer unit that is type tested, but I still think that there should be no problems with this arrangement, as you say if it is suitably labelled then there should be no problem.

DNS1 · Jul 19, 2013

Thanks chaps, much appreciated.

As I said, I'd be happy doing it any time, but it's just a worry knowing that if the inspector is narrow minded then I'll be stuffed and have to pay for another visit!

stidge · Jul 19, 2013

Should be fine mate, label well all good !

SPARTYKUS · Jul 19, 2013

DNS1 said:
Thanks chaps, much appreciated.

As I said, I'd be happy doing it any time, but it's just a worry knowing that if the inspector is narrow minded then I'll be stuffed and have to pay for another visit!

If they ever try that trick just walk onto the next robber- I mean scheme provider {cough} and tell them to get stuffed. They'll soon back peddle. Money money money! Yes! Safety safety safety? No!

DNS1 · Jul 29, 2013

Got round to setting up the board I was asking about:

[ElectriciansForums.net] 2 supplies, one board

That configuration look decent enough? Obviously I'll be labeling it very clearly so people know both supplies have to be isolated before opening the board.

Still paranoid about the scam inspector failing me because it's a bit different...

Rampantchilli · Jul 29, 2013

Sorry to seem dim, but why have you come out of the bottom of the main switch into the bottom of the Rcd? Convention has it out the bottom of the main switch then into the top of Rcd, with neutral links to relevant neutral bars and live busbar straight out of the bottom of the Rcd then across to CBs.
Just make sure you can connect your rcds up this way, as in my mind its backwards, but I'm happy to be corrected

DNS1 · Jul 29, 2013

Busbar wasn't long enough to link the 6 MCBs and the RCD which is why I've used the links.

Just decided to run between the switches and RCDs that way as it looks neater. I did have to check the manufacturers specs to ensure the RCDs could operate both ways but all is fine!

Octopus · Jul 29, 2013

How are you going to explain to the Elecsa Assessor, why you have ALL your "daytime" circuits on one RCD. That won't comply to the regs IMHO.

DNS1 · Jul 29, 2013

Murdoch said:
How are you going to explain to the Elecsa Assessor, why you have ALL your "daytime" circuits on one RCD. That won't comply to the regs IMHO.

It's only a small flat (1x socket ring, 1x lighting radial, cooker, shower, bathroom radiator and water heater). That still likely to be an issue?

Octopus · Jul 29, 2013

DNS1 said:
It's only a small flat (1x socket ring, 1x lighting radial, cooker, shower, bathroom radiator and water heater). That still likely to be an issue?

As I said, IMHO a single RCD is not compliant.

I would put a call into the Elecsa Technical line and consult them, but with a word of warning, they are like economists and have differing opinions.

DNS1 · Jul 29, 2013

I might as well put the lighting on an RCBO.

Should make it compliant shouldn't it?

Octopus · Jul 29, 2013

Hum, yes it would.

Now given the time you have spent, may be a ready built "out of the box" board would have made sense?

2 supplies, one board

DNS1

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mtfpuk2011

Geoffsd

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stidge

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SPARTYKUS

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