In article ,
"Roger R" writes:

"John Rumm" wrote in message
...

What's the point in PVC channel anyway? It offers little protection. Is
it just to make thing easier for the plasterers?

Basically yes - protects the cable from trowel damage, and holds it flat
to the wall. It is sod all use later should you want to extract and
replace a cable.

I don't understand why you say it is no use later if extraction and
replacement of the cable is required. I would have thought that was the
principal advantage, please advise.

I have rewired a house, and made extensive use of the capping
whereby I used the old wires to pull the new wires through.
There was only one piece in the whole house I couldn't pull out.

Oval trunking is easier, but that's not normally used for first
fix in a new building as it's thicker.

--
Andrew Gabriel