UK Running conduit in walls to knockout boxes for low voltage cables?

[BillMcLeod]

Background

I'm running some low voltage cable (e.g. CAT6A data cable; coax cable; HDMI cable and speaker cable) to a number of rooms of the house and would like advice on the best way to do this to avoid plastering the cables into the walls - to give me flexibility to remove / pull new cables in the future (if needed) without having to re-plaster.

It's an old 1915 house with thick plaster walls. We'll be lifting the floorboards, running the cable underneath, and then chasing out a channel in the walls up to a new cutout for a 35mm 2-gang knockout box. Each 2-gang knockout box will be fitted with a 4-module euro plate and the appropriate modules e.g. 2 x RJ45 euro module; 1 x ftype euro module; 1 x HDMI cable euro module.

The knockout boxes have 20mm holes, so I am assuming that I can run 20mm conduit from the bottom of the knockout box, down the chased wall channel and then under the floorboards.

My questions are:

1. What type of conduit to use? Rigid 20mm PVC? Flexible 20mm Conduit? Any particular brands / suppliers recommended?
2. How do I couple the conduit to the knockoutbox?
3. Am I best only running the conduit as far as under the floorboards (to stop them being plastered in) or should I try to run them all the way back to 'base'?
   1. The advantage of doing the full conduit 'back to base' would presumably allow me to pull new cable without lifting carpet or floorboards, but this isn't the biggest pain in the world if I need to do it... Having to re-plaster and re-decorate would be a bigger nuisance.

 

[Pete999]

Push clips work well in chases for both round and oval conduit.

Yeah but saddles????? nah

 

[littlespark]

If the chase is wide enough, what’s wrong with saddles? No need to bother with the back bar, just nail it in place with felt nails.

To use the clip in fixings, you’de need to cut the chase deeper.

 

[radiohead]

I disagree on gluing being essential. It isn't if the conduit is installed correctly, if people are installing plastic conduit so badly that it requires gluing to remain secure then they need to have a look at their workmanship. However I respect the views of others who feel gluing is required even if installed properly, and am not so ---- that I feel the need to plaster other peoples posts with red crosses.

 

[ipf]

However I respect the views of others who feel gluing is required even if installed properly, and am not so *---- that I feel the need to plaster other peoples posts with red crosses.

I hope you accidentally left the 'b' out on that one...…..if not, I worry for you!…..but at least you don't use glue.

 

[Pete999]

I disagree on gluing being essential. It isn't if the conduit is installed correctly, if people are installing plastic conduit so badly that it requires gluing to remain secure then they need to have a look at their workmanship. However I respect the views of others who feel gluing is required even if installed properly, and am not so ---- that I feel the need to plaster other peoples posts with red crosses.

I disagree on gluing being essential. It isn't if the conduit is installed correctly, if people are installing plastic conduit so badly that it requires gluing to remain secure then they need to have a look at their workmanship. However I respect the views of others who feel gluing is required even if installed properly, and am not so ---- that I feel the need to plaster other peoples posts with red crosses.

So it's wrong in your eyes to disagree with someone is it Mate? and I agree that the red cross is a bit BANAL.
So how can I disagree without the red cross? and you consider gluing PVC conduit is only required if the conduit is installed incorrectly do you? Answers on a post caed leave the red crosses out please, it's BANAL

 

[davesparks]

I disagree on gluing being essential. It isn't if the conduit is installed correctly, if people are installing plastic conduit so badly that it requires gluing to remain secure then they need to have a look at their workmanship.

Installed correctly in my opinion means it is glued together, that's the way I was taught to do it and so that's the way will always do it.

I've seen far too many PVC conduit installations that have come apart either though mechanical damage or thermal expansion/contraction to be happy with it not being glued.

 

[littlespark]

And apart from all that, the smell of the glue gives you a nice little buzz

 

[davesparks]

And apart from all that, the smell of the glue gives you a nice little buzz

I don't know about a buzz, but it gives me a headache after a while.
Much like trying to read some of buzz's posts!

 

[radiohead]

So it's wrong in your eyes to disagree with someone is it Mate? and I agree that the red cross is a bit BANAL.
So how can I disagree without the red cross? and you consider gluing PVC conduit is only required if the conduit is installed incorrectly do you? Answers on a post caed leave the red crosses out please, it's BANAL

I disagree on gluing being essential. It isn't if the conduit is installed correctly, if people are installing plastic conduit so badly that it requires gluing to remain secure then they need to have a look at their workmanship. However I respect the views of others who feel gluing is required even if installed properly, and am not so ---- that I feel the need to plaster other peoples posts with red crosses.

In answer to your post Pete
How can it be wrong in my eyes to disagree with someone when I have stated in my above post that I disagree? There are however ways to disagree with an explanation of reasons rather than petulant red crosses. That's how you disagree.
Nowhere did I say that glue can be used as an excuse for poor installation, just that if installed correctly there is no need for glue for security, and I stand by that statement.

 

[Pete999]

In answer to your post Pete
How can it be wrong in my eyes to disagree with someone when I have stated in my above post that I disagree? There are however ways to disagree with an explanation of reasons rather than petulant red crosses. That's how you disagree.
Nowhere did I say that glue can be used as an excuse for poor installation, just that if installed correctly there is no need for glue for security, and I stand by that statement.

No petulance intended in the red cross Mate,