Nick wrote:
"Pete Verdon" d wrote

In the same area, though, is a run of SWA that supplies the shed. It's
clipped to the house wall, the side of the patio, and then to the garden
wall to run down to the shed. This new concrete I'm planning would be
poured over part of the cable, so it would come down the house wall into
it, then emerge up the garden wall on the other side.

Might it be worth laying some kind of duct to allow for future additions or
mods?

The problem with such a duct in the "pouring" face of a drain gully is
that the duct is likely to catch a fair bit of any water being poured in.

I suppose I could run the ducting a little way up the walls either side.

Mind you, I'd need some kind of split ducting to install it in-situ - I
don't want to remove half the cable to feed it into a tube.

Best just slap concrete over the lot, I reckon. The odds of needing to
get at that cable are minimal, and any future ones (also unlikely) can
take a different route.

Cheers,

Pete