Discussion regarding mixed colours in CU

[HappyHippyDad]

I am having a discussion with a friend who is currently training to be an electrician. He is adamant that you cannot mix colours withing a consumer unit. He says the regulations state it and he will find the reg number (we haven't got one to hand at the moment).

I have always been under the impression that it is ok to mix the colours (i.e using brown/blue for a new circuit in a consumer unit that contains red/black) and then place the required sticker on the CU. We only have the Onsite guide to hand which just states the 'sticker' should be placed on the CU, nothing is mentioned about the wiring in the CU itself.

Is there a regulation that states you cannot mix colours in a CU?

I can't believe there is!

 

[Simonslimline]

I wonder if he has found the reg number yet lol.

 

[HappyHippyDad]

I wonder if he has found the reg number yet lol.

Nope, still waiting

 

[cliffed]

Mixed colours were way back,fight against racialism.

 

[Deleted member 26818]

This is probably something to do with when the change occurred.
There was a 6 month period where either the old or the new colours could be used for new installations, but not a mixture.