How to sleave mixed old and new wiring

[davidr]

Hi

I'm adding a new light and switch in a bedroom to existing 1.5mm red and black lighting circuit with plenty of spare capacity. A new 4-way junction box will have both red and black T&E and blue and brown T&E plus earths.

Do I sleave the new switched live blue wire with brown or red sleaving? Can you still buy red sleaving?

I'll put a sticker on top saying mixed wiring schemes.

Thanks

 

[rebuke]

I don't believe it is defined (but not 100% sure on that) - given your new switched live is in new colours (i.e. blue), then i'd go for brown sleeving - i.e. be consistent with the actual cable you're using...

I'm fairly sure in terms of stickers, the only requirement is to have one on your consumer unit - it's not a bad idea to put one on the junction box as well, but make sure there is one on the CU, as I'm fairly sure this is required in the regs...

 

[ban-all-sheds]

Yo - go for consistency with the cable, so for harmonised sleeve it brown, but if there's sleeving missing on the old cable, use red.

And yes, sticker needed on CU.

PLAN B - use old colour cable and avoid all these problems...

 

[davidr]

[PLAN B - use old colour cable and avoid all these problems...[/quote]

Thanks both - where can I buy old cable for reasonable cost - I thought it was banned?

A guy on ebay wants £15 for 10m of old three-core+earth plus £10 P&P !

Think I'll use blue and brown and a 90p B&Q yellow sticker !

 

[Albert]

[PLAN B - use old colour cable and avoid all these problems...

You should not use the old colours... The idea is to mark the S/L so it will not be confused with the neutral; red or brown, I think, will be fine as long it is marked.

It is not complicated to put a sticker on the CU.

 

[GaryMo]

You should not use the old colours...

If an installation comprises fully of red and black conductors and you choose to add to or alter an existing circuit with pre-harmonised twin and earth I wouldn't have though you would have a problem as long as the deviation is noted on the MWC or EIC.

 

[ban-all-sheds]

I agree.