domestic conduit question external is plastic exceptable?

[pbrender]

Hi Everyone,

is it exceptable to use plastic conduit outside on a domestic install or should it only be galvanised steel?


I have to run power in 2.5 t&e approx 3m outside along a brick face, they have already bought the plastic conduit!

thankyou to everypne who answered my first post.

paul​

 

[Deleted member 26818]

Yes it is.

 

[Des 56]

Is the plastic conduit suitable ?
Is it going to get fried by sky high temperatures or whacked with heavy objects

:tank::66:
If you think its suitable,then it probably will be

 

[pbrender]

thankyou!

I don't know why, but, I was concerned with it weathering badly and becomeing brittle!

thanks again that will make that job even quicker!:icon6:

 

[johnboy6083]

It's a question of risk in my opinion. Is it likely to get damaged, or vandalised. These are questions you will have to ask. I would of probably gone with galv, but if they've bought PVC, then thats what you may have to use. Don't forget to allow for expansion on runs longer than 3m in PVC.

 

[pbrender]

yes,

will be about 3m off the floor and down a side wall so out of diredt sunlight and adverse weather,chance of impact virtually zero!

so plastic is the way for this job!

happy days!

 

[Spudnik]

Rewired a kennels about 10 years ago, using pvc and its still going strong.

 

[SW1970]

It's a question of risk in my opinion. Is it likely to get damaged, or vandalised. These are questions you will have to ask. I would of probably gone with galv, but if they've bought PVC, then thats what you may have to use. Don't forget to allow for expansion on runs longer than 3m in PVC.

Johnboy, what's your recommendation on how to cope with expansion on longer runs? Many thanks.

 

[jaresquire]

I believe you can get expansion joints that allow for some movement.

 

[sparks_114]

Black conduit (PVC) is preferred when used outside, white when inside.

 

[MarkieSparkie]

Hi pbrender, If you're using plastic, heavy weight PVC conduit is more robust for external use, also black PVC has a higher resistance to the ageing effects of exposure to UV light.

 

[johnboy6083]

Johnboy, what's your recommendation on how to cope with expansion on longer runs? Many thanks.

You cut the tube short in the coupler, and seal it with flexible sealant ontbe outside. Use a polyeurathene sealant, that is designed for exterior use. I hate it when I see long PVC tube runs that start to bend. Another idea that is use on long runs of pipe is expansion loops. They put put a bubble in the pipe, so that the bends absorb the expansion. This wouldn't look very good in conduit though, unless the bends were needed anyway, for example to set around an obstacle.

 

[Engineer54]

Black conduit (PVC) is preferred when used outside, white when inside.

Doesn't matter much about the colour, it's far more to do with the grade and thickness of the PVC conduit that's being installed externally.

 

[Silly Sausage]

You cut the tube short in the coupler, and seal it with flexible sealant ontbe outside. Use a polyeurathene sealant, that is designed for exterior use. Ihate it when I see long PVC tube runs that start to bend. Another idea that is use on long runs of pipe is expansion loops. They put put a bubble in the pile, so that thebends absorb the expansion. This wouldn't look very good in conduit though, unless the bends were needed anyway, for example to set around an obstacle.

How about using short sections of flexible conduit properly joined with couplers & solvent cement?

 

[johnboy6083]

flexible conduit is not usually IP rated, and the stuff that is, costs.