Plastic conduits plastered in walls

[RMS]

Hi all,

Is it okay to plaster 20mm conduit in walls or is there a risk of the plaster cracking due to temperature change and expansion of the conduit. I am thinking of using it to rewire my house.

Any help appreciated.

 

[oharaf]

You would have to sink it fairly deep so that the plaster skin was thick enough.

What about capping?

 

[daytona]

you would need to bury it a bit deeper anyway,so the coupler flushes in properly.makes for a very pukka job does conduit

do it mate,no issue

 

[RMS]

The reson I am thinking of using it is because the cables can be renewed easily. Also the width of the chase is halfed and makes plastering easier as I will be plastering. The walls are thermolite so they are very soft. I am using a grinder as it is neater. I was just worried incase the plastic conduit caused the plaster to carck over time.

 

[RF Lighting]

I did some in my house about 8 years ago.

No sign of cracking yet....

 

[regsmyth]

Are you talking about round 20mm pipe, or flat oval, or square trunking? Just curious.

 

[RF Lighting]

I have 20mm heavy gauge PVC conduits in my walls, but regularly install oval conduit for folk without issue

 

[regsmyth]

AFAIK vertical chases shouldn't be deeper than 1/3 wall thickness.
Horizontal chases shouldn't be deeper than 1/6 wall thickness.
This might affect your choice of conduit/covering.

 

[equitum]

The reson I am thinking of using it is because the cables can be renewed easily. Also the width of the chase is halfed and makes plastering easier as I will be plastering. The walls are thermolite so they are very soft. I am using a grinder as it is neater. I was just worried incase the plastic conduit caused the plaster to carck over time.

Why would you want to renew the cables after you have just rewired it ??

Why go to the hassle, time and cost to wire in conduit when you can just bury the cables (that will outlive you) in the plaster ?

 

[daytona]

if thats what he wants...............

far better job anyway and as for expense heavy gauge tube is cheap as