Oval tubing is better
All it is for is to protect from the plasterers trowel damaging the cable Oval also helps if a cable has been damaged to pull another cable through without ripping the wall to bits
protective channelling is cheaper and the option id go for particularly if youve got loads to do. As previously stated conduit will allow you to pull/feed cable(s) through it in the future. But what are the chances of that being necessary ?
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