Re: External conduits

[Jim Noble <yahoo-groups@xxxxxxxxxxxxxxxxxx>]

Hawes,Timothy Edward (GEG) wrote:

> I've buried some 50mm ID black twin-wall trunking in the garden for
> mains and LV cabling (2x ducts). I got a 50m roll and paid about 55
plus
> vat from a place in Farnham, Surrey (mail me off-list if you'd like
the
> no.)  or any builder's merchant should be able to get it for you.
>

Could be useful. Although I've just noticed Screwfix have 10m of 50mm
pump delivery pipe for £25.99 (shame I'm refusing to use them while they
maintain this stupid "go away we've got enough orders for today"
policy...).

> I've also used the 40mm push-fit waste pipe inside the house for cable
> ducts between floors (hidden in a stud wall).


I think my backup plan will be to use 40mm waste pipe...

> > What's the best way to top water collecting inside it?
> Don't have any low points / pockets i.e. don't start at a high level,
> drop down, then rise back up.


Not a lot of choice there! Has to come out of the house above floor
level, and go below the decking, which is itself below the house floor
level...

> I've recently discovered that a tumble
> dryer exhaust vent makes quite a neat cover for the hole through the
> wall and lets you maintain the correct bend radius for the cables
> without the whole thing looking like a dogs breakfast (bring ducting
up
> into dryer outlet & secure, clip ducting to wall).


Bing! <light goes on> Saying that has reminder me that there's an
unused
tumble drier vent not far from where the cables need to come into the
house... :-)

>
> > I suppose I could use a bit of drain or waste pipe to form a
> > complete dry route into the house at both ends...?
> Also a good solution, and probably cheaper than 50m of twin-wall
conduit
> if you're only doing a short length and you'll also get a choice of
> joints, bends etc. Plenty of silicone on the joints should keep it
> watertight. You might also get it in brown too to disguise it a bit.


Hiding it isn't too much of an issue. It'll mostly be out of site below
the deck.

> You might also want to think about how to make it rodent-proof i.e.
stop
> rodents using the ducting like a cat-flap. Squirrels are a problem
here,
> rats would be more unpleasant.


Hmm, yes, good point. That makes me want to use drainpipe all the way...

> > Fix it to the underside of the decking joists, or let it lie
> > on the ground? (it's shingle)
> I'd clip it to the underside if it were me.


That could be fun. There's only about a 6" gap at most, underneath the
joists. Maybe it's the excuse I need to get an air nailer (got a plumbed
in compressor in the garage :-)

Ta!

Jim