Running cables through a cavity

[DNS1]

Just seen someone mention on another thread that running cables in a cavity is bad practice.

Can anyone elaborate for me, I was under the impression that this was ok but not ideal in a new build etc.

How should it be done these days? I'm in a 1990s flat and just wondering how a rewire will be possible without completely trashing ALL the plasterboard!

 

[Dan the spark]

Damn these donught fingers haha

 

[cdavies33]

If the cables are run within the plaster you'll need rcd protection, you will never cut in 50mm in standard breeze block because you'll be breaking a reg from part A of the building regs.... Structure I think it is, Also I'm a Jib Approved spark thank you very much!

 

[rich.250]

I wasn't suggesting you weren't, just I know I was told by my old boss not at college. Just questioning why more emphasis isn't on it at college

 

[Dan the spark]

If it's a domestic they will all be covered by rcd anyhow

 

[rich.250]

Ok lads, but how is it to be done on a new build now?? I can be sure of it that all the domestic installers out there aren't carrying 25mm Galv, bushes, end boxes, etc!

So how are they doing it!?!

Sorry mate I miss understood. I didn't read properly. I see you meant installation method

 

[cdavies33]

Anybody got anything else?? Hate to sound rude but every one hasn't complied with bs 7671 yet, except with what I said, Galv conduit method hacked in!

 

[jase]

am i being thick? how do you feed an outdoor socket from and existing socket or fuse spur inside then if you cant go through cavity?

 

[cdavies33]

If it's a domestic they will all be covered by rcd anyhow

Are you kidding me?!?! Tails to the consumer unit we are talking about here!

 

[cdavies33]

am i being thick? how do you feed an outdoor socket from and existing socket or fuse spur inside then if you cant go through cavity?

Your allowed to go directly through the cavity just not vertically through it!

 

[rich.250]

Are you kidding me?!?! Tails to the consumer unit we are talking about here!

Yes your method is correct for tails.
I should really start reading all the posts first. Lol
I was just referring to standard installation.
And yes straight through is fine.
I think you will find that the majority of domestic installs don't comply from what I have seen

 

[cdavies33]

Yes your method is correct for tails.
I should really start reading all the posts first. Lol
I was just referring to standard installation.
And yes straight through is fine.
I think you will find that the majority of domestic installs don't comply from what I have seen

I agree, I bet 99% of contractors out there just run them up the cavity and just keep it hush hush and I have no shame in staying I done and still do it this way. But if anyone does have another method bar the galv conduit route, be sure to let me know!

 

[DNS1]

If it's new build you run your cables in capping to the accessories prior to the plastering/dot and dabbing

Is the capping really necessary?

I've always been under the impression that for a new build the cables are normally just clipped direct to the breeze block before the dot and dabbing...

 

[rich.250]

I've seen a lot of that. I always try to make a rewireable system using oval conduit to roof/floor void, this means cables can be replaced wit no disturbance of decoration.
Better practice I think, and quicker than clipping loads of cables

 

[rich.250]

I agree, I bet 99% of contractors out there just run them up the cavity and just keep it hush hush and I have no shame in staying I done and still do it this way. But if anyone does have another method bar the galv conduit route, be sure to let me know!

I suppose you could fuse down in meter box and run earth metallic sheathed cable to distribution board lol

 

[Dan the spark]

Sorry cdavies thought you were referring to the t+e