20mm Plastic Trunking
- Thread starter polomints
- Start date
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I take it you mean conduit, not trunking?
The guidance is every 1.5m, but IMO that's asking for trouble outdoors. I'd not be surprised if every 50cm wasn't close enough to avoid it sagging when it gets warm.
Don't forget the sliding couplers to allow for expansion/contraction.
What you should probably forget is the whole idea - PVC conduit is troublesome outdoors.
Why do you want to use it anyway?
The guidance is every 1.5m, but IMO that's asking for trouble outdoors. I'd not be surprised if every 50cm wasn't close enough to avoid it sagging when it gets warm.
Don't forget the sliding couplers to allow for expansion/contraction.
What you should probably forget is the whole idea - PVC conduit is troublesome outdoors.
Why do you want to use it anyway?
You are correct I did mean conduit, I am going to install a couple of halogen lights and having seen conduit used on properties around my area I thought it looked better than the cable being exposed.
I assume that your point regards expansion effect on any couplers in practice would mean only sliding them half way on and not fully up to the internal shoulder.
I assume that your point regards expansion effect on any couplers in practice would mean only sliding them half way on and not fully up to the internal shoulder.
No. You need to use proprietary expansion couplers.
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How are you going to connect the conduit to them?
PVC?
Have you seen it after it's been baking in the sun?
Even better when its had sun, frost, sun, frost, sun.
Mind you, at the moment we are only going to get frost, frost, frost, frost...
Don’t trust it. Got my anorak on standby
Where do you get these from ? my normal suppliers cannot supply.
Yes I have 40 meters of it running the length of my south facing garden housing cctv cables, it is supported by the hedge and trees and has shown no signs of problem in the last 5 years.
With the intention of using it on a gable end I had not thought there would be a problem.
Still straight as an arrow, is it?
Generally speaking, pvc conduit is no good outside.
You'd have to rely on glue to make the joins watertight.
You'd have to rely on glue to make the joins watertight.
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