Hello

Following on from my recent installation of an extractor fan.

The fan I fitted requires 4 connections: neutral, permanent live, and two
switched lives. I bought myself a length of 4 core cable of the required
rating but I'm confused about which colours to use and whether there might
be a different coloured cable that I should have used.

The cable that I bought has inners coloured brown, blue, black and
green/yellow. I wired the blue to the neutral and the brown to the permanent
live - leaving the black and green/yellow for the two switched lives. I have
a 3 pole isolator on all of the live cables, but even so, I'm not
comfortable with having a green/yellow for a potentially live cable and I'd
like to find a solution to this asap.

What is the normal convention in these situations - is there a 4 core cable
with different colours made specifically for this type of installation?

Thanks
Thomas