Conduit Wiring - Colour Check

[GreenBoy1966]

Hi

My neighbour has asked if I could help him re-rout some wiring in his shed / garden office.

The situation is he has moved the door from one end to the side and this now means that the existing plastic conduit (which contains a ring main wired in Red, Black and Green/Yellow 2.5mm singles) runs at waist height across the new door.

He has asked me to help him re-rout the cables up and over the new door.

There is no slack in the cables so re-using them is out of the question, so he will have to use new cables (Brown, Blue and Yellow/Green).

My question is this: Do I need to sleeve any of the new or existing cables to be compliant with regs?

The current ring is from point to point so it is only a case of replacing the affected wires between 2 points - but this will obviously mean that part of the circuit is in new and part in old wiring colours.

Thanks for any comments

 

[GreenBoy1966]

Update

I think from the WIKI this is called an A1 Ring Final Circuit

//www.diynot.com/wiki/electrics:socket_circuits:a1_ring_final_circuit

Also - am I correct in thinking lighting circuits use the same colouring?

 

[wingcoax]

To comply, you need to fix a label to the incoming junction box/mini CU, or equivalent, saying that there are cables to more than one standard. These are available from most good electrical shops.

 

[RMS]

There is no requirement to change the colour of the existing wiring.

Although there is a requirement to fit a warning notice if mixed wiring colours are present within an installation if wiring additions or alterations are made. The warning notice should be placed at or near the consumer unit.

 

[GreenBoy1966]

Thanks for the information

I think I will need to use the warning notices as I don't know where to get Red cables from

Black, Brown, Blue and Yellow/Green is from everywhere - but 2.5mm Red seems a bit thin on the ground.

 

[GreenBoy1966]

Ah - just found a local supplier that apparently does RED cables - only problem is all the cables come in a minimum of 100m so going to have a lot left over!

Never mind - thanks to all for your comments

 

[Paul_C]

The red is becoming thinner on the ground because it's no longer a standard color under the new scheme. Black is still widely available because it's now a phase color for 3-phase systems (brown/black/grey).

 

[ban-all-sheds]

Black, Brown, Blue and Yellow/Green is from everywhere - but 2.5mm Red seems a bit thin on the ground.

Tried fleabay?

 

[securespark]

If they are singles, you'll need to enclose them in conduit: you can't sleeve them.

 

[JohnW2]

If they are singles, you'll need to enclose them in conduit: you can't sleeve them.

My neighbour has asked if I could help him re-rout some wiring in his shed / garden office. .... means that the existing plastic conduit (which contains a ring main wired in Red, Black and Green/Yellow 2.5mm singles) ....

Kind Regards, John.