On 04/01/2018 23:05, Steve Walker wrote:
On 29/12/2017 14:37, Andy Burns wrote:
wrote:

George Miles wrote:

Is it allowed to extend an old circuit using black and red wiring
with new
blue and brown.

Yes.

But you should put a warning sticker on your CU(s)

https://www.labelsonline.co.uk/electrical-labels/bs7671-cable-colour-harmonisation-labels


Which has always seemed a little superfluous in domestic premises with
single phase supplies.

Red - Brown
Black - Blue

There's no mistaking which is live or neutral in either case.

Slight possibility of confusion when 3&E is used; Red, Blue, Yellow, or
Black, Grey, Brown - all of which can be lives.


--
Cheers,

John.

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