Re: Number of cables per conduit?

[Robert Jennings <yahoogroups@xxxxxxxxxxx>]

Jon,

Is it a new build ? If it is I would consider using cable tray. It is
what electricians will use so it is cheap, easy to source and has many
sizes, joints etc. Lay it on to of your joists so it doesn't weaken
them.

Robert

On Wed, 2006-10-04 at 08:59 +0000, Jonathan Shaw wrote:
> Are there any guidelines on the number of cables (Cat5, CT100, speaker
> etc) that will fit into 20 or 25 mm conduit?
>
> Common sense suggests that the conduit cannot be filled to the max,
but
> what is the practicle limit?  9 x 5mm cables in 20 mm conduit?
> Does it help to pull a bundle through at a time?
>
> I am thinking of running a 40mm waste pipe as a main conduit from
Node0
> along the length of the house.  The joists are 180mm deep so can use a
> 45mm hole if my reading of building regs is right. I was then going to
> spur off 20/25mm conduit from this into the walls to the various
> outlets.  Does this sound OK?
>
> TIA
> Jon
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