Consumer unit labelling

golfpaul · Aug 1, 2014

What labelling needs to be on a new CU?

Ive got the RCD/date of inspection/circuit info labels, I know i need a label for different coloured conductors.

Do I need a label on the MET? Also, the supply is through a DP isolator, does that need a label?

Ive got an Elecsa assessment shortly so needs to be right :crazy:

Thanks.

Pete999 · Aug 1, 2014

Installation test results, I would imagine the DP isolator belongs to the DNO or di you install it?

Andy78 · Aug 1, 2014

Section 514 is what you need to know

golfpaul · Aug 1, 2014

Yeah i installed the isolator.
Does the met need anything?
Test results - on the actual cb?

Thanks Andy, ill check out 514.

Pete999 · Aug 1, 2014

Test results on the cb? sorry not with you on this mate, What I meant was a copy of the certificate with the results on it for reference if anyone else does any work in the future, not sure if this is a requirement but it can;t do any harm.

Richard Burns · Aug 1, 2014

Relevant ones may be:
RCD testing
Periodic inspection
Mixed colours as you said
Circuits must be identified
I think there is some case for have a schedule of circuits with the CU but not required by regs, just that a schedule is available.
All (external to enclosures) Main earths and main bonding connections should have safety electrical connection do not remove label
If you have a dual supply then you would need to label for that
The main isolator could be usefully labelled main isolator / switch (it is a circuit after all).

Just make sure they are in sensible places and remember that they do not need to fixed to the CU they can be adjacent to it.

trev · Aug 1, 2014

The mixed colour wiring sticker annoys me. If you don't know what colour means what on both the new and old colours then you have no business poking around in there.

golfpaul · Aug 1, 2014

trev said:
The mixed colour wiring sticker annoys me. If you don't know what colour means what on both the new and old colours then you have no business poking around in there.

Totally agree Trev.

Ok - Main earth and main isolator, ill sticker them up too - cheers.

Geordie Spark · Aug 1, 2014

trev said:
The mixed colour wiring sticker annoys me. If you don't know what colour means what on both the new and old colours then you have no business poking around in there.

Gan canny with them son .. they canit help not being as clivvor as us Geordies.

Sum o' them need Sat Nav t' find theor way t' the netty man!

golfpaul · Aug 1, 2014

Geordie Spark said:
Gan canny with them son .. they canit help not being as clivvor as us Geordies.

Sum o' them need Sat Nav t' find theor way t' the netty man!

To quote Partridge.

"That was just a noise..."

trev · Aug 1, 2014

golfpaul said:
To quote Partridge.

"That was just a noise..."

Not to me it wasn't

davesparks · Aug 1, 2014

The most important thing is that you have an accurate circuit list, the rest is just decoration

Andy78 · Aug 1, 2014

Richard Burns said:
Relevant ones may be:
RCD testing
Periodic inspection
Mixed colours as you said
Circuits must be identified
I think there is some case for have a schedule of circuits with the CU but not required by regs, just that a schedule is available.
All (external to enclosures) Main earths and main bonding connections should have safety electrical connection do not remove label
If you have a dual supply then you would need to label for that
The main isolator could be usefully labelled main isolator / switch (it is a circuit after all).

Just make sure they are in sensible places and remember that they do not need to fixed to the CU they can be adjacent to it.

Aye, 514.9.1 details the info required to be provided.
If you are using model forms for certification not all this information is included on them, and so a separate DB schedule needs to made up to be left with the board.
Most third party duplicate forms include all the necessary info on the schedule of test results so this suffices as a provision of all the required information.

telectrix · Aug 1, 2014

and don't forget the sticker with your name and phone number for future work.

Geordie Spark · Aug 1, 2014

telectrix said:
and don't forget the sticker with your name and phone number for future work.

An divven't foret th' lyebl wot sez "THIS WAY UP" - just so them them knaas if it's been fitted upside doon.

telectrix · Aug 1, 2014

that's to make sure it's not been fitted by an aussie or, worse, a plumber.

Risteard · Aug 1, 2014

trev said:
The mixed colour wiring sticker annoys me. If you don't know what colour means what on both the new and old colours then you have no business poking around in there.

Whilst I don't disagree there is more scope for confusion in a three-phase installation given that what was a phase conductor is now the neutral conductor and what was the neutral conductor is now a phase conductor (or line conductor to ensure that my terminology complies with the 17th Edition!).

telectrix · Aug 1, 2014

trev said:
The mixed colour wiring sticker annoys me. If you don't know what colour means what on both the new and old colours then you have no business poking around in there.

what are these new colours? are they changed from red/yellow/blue/black?

malcolmsanford · Aug 1, 2014

telectrix said:
what are these new colours? are they changed from red/yellow/blue/black?

Think you mean white there Tel :willy_nilly:

telectrix · Aug 1, 2014

they're all grey in the dark.

Octopus · Aug 1, 2014

I use PIRform for my certs - and this has the option to print off a circuit schedule, which I then laminate and pass to the client to keep by the CU. This includes my contact details.

malcolmsanford · Aug 1, 2014

Think Tel and I prefer the more technical approach to circuit labeling, on the back of one of these. They can also be used for any design calcs and of course any cartridge fuse replacements, the silver paper just about covers any load size