multicore supplies

[Matthew]

Hi guys, been an electrician for a few years now and feel quite silly for asking this. I was recently doing a PIR on two different flats in different locations and found that the L supply was one core brown and the N was multiple cores then the earth was again multiple cores all of which coming from one cable. I have heard of these before but never seen one and would like to know what they are called and in the test cert do i fill in 1 cable for live 25mm and 10 cables for blue 1.5mm for example.

Thanks Guys

 

[xraytek]

Is this it?

Split Concentric Cable BS7870

 

[Guest123]

I think xraytek has it, deffo sounds like split con to me.

They will both be 25mm overall CSA.

 

[Matthew]

Cheers guys. Your both a big help.