PVC Conduit Question

[RDB85]

I’m looking to buy some PVC Conduit for some security lights rather than clip the cable. We don’t use it in work. But I know I need 20mm conduit but would I be okay using 20mm inspection elbows? I assume they just fit inside?

 

[freddo]

Can you post a photo showing the issue? It's not something I've come across before!

 

[Risteard]

I know it should do this doesn’t it’s the same diameter. So it doesn’t push inside. Not sure if it’s the conduit or the fixings I’ve bought. The fixing are a brand make and the conduit was given to me.

I'm going to guess that you have 25mm conduit with 20mm accessories/fittings.

 

[RDB85]

Measures the conduit and the inspection bend both 2cm.

 

[littlespark]

Plumbing drain pipe comes in a 21mm diameter size. Could be you’ve been given drain pipe.

 

[freddo]

21.5mm overflow pipe?

Oops, crossed with LS.

 

[ipf]

Who 'gave' you the conduit/pipe?

 

[RDB85]

So looks like I need some 20mm pipe then. Thanks it was a mate, he’s not a plumber though it was a fellow spark lol

 

[Pete999]

No not if the conduit is 20mm, 20 mm everything Saddles, fittings and bending spring.

 

[telectrix]

Measures the conduit and the inspection bend both 2cm.

that'snot conduit. it's a wet-pants' water pipe.

 

[Mike Johnson]

Yes overflow pipe, but if you must use it, asa it is thick walled I have successfully turned it down at the end by putting a mandrel inside and turning it on an electric drill with some sandpaper or file, gets you out of a problem if needs be.

 

[telectrix]

Yes overflow pipe, but if you must use it, asa it is thick walled I have successfully turned it down at the end by putting a mandrel inside and turning it on an electric drill with some sandpaper or file, gets you out of a problem if needs be.

easier to get the right conduit. and why white? bloody eyrsore. black is more appropriate.

 

[RDB85]

easier to get the right conduit. and why white? bloody eyrsore. black is more appropriate.

Because I have white pvc windows and doors and a white iron gate. So black would stick out.

 

[Simon47]

Every brand of conduit I've used has had the make and size printed along it - typically about once a meter. I try and put the printing at the back where it's not visible when I fit it.
As to fitting vs forming ... Well that's a tricky one. I agree that well formed bends and sets look waaaay tidier than a load of bends and short bits of pipe. But on the other hand, making well formed bends and sets is an art form in itself and I would imagine a novice would need "a few attempts and some spare pipe" during the learning process (especially doing it free-form with a spring). I don't consider myself very good at it
As mentioned, give the pipe a good rub (to warm it) before bending, and bend it well past where you want it to stay as it will spring back considerably.

 

[Mike Johnson]

As much as the hate a plumber on here extends, they have their own problems in that each manufacturer of plumbing fittings make then all a slightly different size so not that easy to co-ordinate fittings to fit together, and then we have tried to fit plumbing pipe into conduit fittings, will this madness ever end. LOL

 

[davesparks]

Because I have white pvc windows and doors and a white iron gate. So black would stick out.

If it is being used externally it should be black.

Post automatically merged: Apr 15, 2020

Yes overflow pipe, but if you must use it, asa it is thick walled I have successfully turned it down at the end by putting a mandrel inside and turning it on an electric drill with some sandpaper or file, gets you out of a problem if needs be.

That won't make it compliant as an electrical conduit though, it is manufactured to a different BS and made from a different material.