On 03/01/2019 10:16, Tim Watts wrote:
On 02/01/2019 22:36, RJH wrote:
On 02/01/2019 22:14, Tim Watts wrote:
On 02/01/2019 21:05, RJH wrote:

3) Routing the wiring. He's intending to use 20mm plastic tube
conduit, which for layout reasons has to go up, round, and down to
the sockets/lights/switches. It'd obviously be neater to route all
the cables in one run of conduit - is there some guidance relating
to stuffing conduit with cable?

Yes - there's the fill factor:

https://www.rm-electrical.com/wp-con...Technical1.pdf


Excellent, thanks.


That's purely on space. In essence, if it fits easily, it's OK.


Are you proposing to use singles?


As in a single run of cable? I need to draw it all out, but at the
very least there'll be the 13A socket and the lighting cable running
through the conduit, to keep things neat.

The lighting cable could in theory be quite skinny - 3A, for the 160W
load?


No - as in single insulated cores - if you are running 100% in trunking
or conduit, it makes sense - more manageable.

I was going to say that too


You can buy that by the metre in some electrical wholesales (think TLC do).

Surely he's going to need a reel of each


If you run T+E in conduit/trunking with multiple circuits you need to
apply a grouping factor (a 1 multiplier to the current carrying
caapcity of the cable).

I am not sure of the calculation with singles for multiple circuits -
did look at my Regs but couldn't find a table for that case.