Flat twin cable with sheathed CPC.

[R-fur]

I was an apprentice in 76 and cant remember what colour the sleaving was, I think it was green/yellow but always referred to as green sleaving.

 

[loz2754]

The combination of green and yellow was introduced in 1978 according to the IET.

 

[Pretty Mouth]

Yes it had to be insulating as opposed to conductive but it wasn't there as an insulator.

Here is the regulation:

D29 (ii)
Where the sheath of earth-continuity conductors complying with reg D28(i) is removed adjacent to joints and terminations, earth continuity conductors of CSA up to and including 6mm2 shall be protected by insulating sleeving complying with bs2848.

D28(i) refers to CPCs within cables (not flex).

Make of it what you will, but to me its main purpose is as an insulator.

 

[IAmSparkytus!]

6193B (I'm assuming you need LSF) has been available for years. While it doesn't meet any British Standard, I can think of nothing that prohibits its use.

Other cable types are also available with insulated CPC and are widely used in 3ph installations. I do occasionally come across T&E in 3ph boards, but it's a very rare occurrence.

What are the alternatives with the sheathed earth?

 

[nicebutdim]

What are the alternatives with the sheathed earth?

6193B

 

[timhoward]

I bet they are delighted at Quickwire, they finally get a 2.5 sq mm junction box out and then the every day standard cable spawns an alternative!

 

[IAmSparkytus!]

6193B

I’m sure I’ve seen an LSF round cable used on sites before as well with an insulated earth. Not flex, something a bit more substantial but not FP either, didn’t seem to have the outer sheath where you can sort of score then bend slightly to make to snap and strip (if that makes sense)