Are you worried about the insides of corners etc? How is it assembled at
corners, surely not like a water pipe with fittings? I don't think I've ever
come across this sort of thing, most conduits I've seen are jointed black
painted tubes with a thread on the end which is often not used for fixing it
seems. Brian

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"Ben Blaukopf" wrote in message
...
Finally got round to looking at the upstairs lights in this place, and
discovered that all the chased-in cable uses 15mm copper as conduit
containing 1 or 2 1.5mm cables (well, could be 1.0)

My understanding is that this doesn't need earthing (it isn't) because it
contains normal T+E, so double insulated.

My concern is that when I pull new cable through it, I run the risk of
damaging it, particularly if I'm running two cables. I can deburr as much
as possible - it's already deburred - and tape over the edges - but is
there anything else to help matters?