C-Bus cable direct in chased masonary wall?

Hello fellow cbussers'
About to renovate my bathroom, need to move the key input switch.
A question for the competent installers, is there any reason you cannot install a C-Bus cable direct in chased masonry wall?
As I understand it, AS/NZS3000 only requires conduit when non-vertical runs are installed. (not that it offers any real protection from a masonry bit!). If we install directly up above a switch then we are allowed to install direct into a channel chased into the masonry wall and then covered over with mud / mortar.

Is there any reason such as "temporary moisture against the pink sheath" that you would not do this?

 

I would run the C-Bus cable inside a plastic conduit of some sort. That way you can pull it out/replace it if necessary. It also provides additional moisture protection for the cable.

Plastering the cable in is probably something that many have done on the odd job to get out of a sticky situation but not something that I suspect many will admit to doing.

 

The only reason to run a conduit is to allow the cable to be replaced.