SWA Through Wall

[uksparks]

Hi,

Whats the best way to take 10mm SWA through this wall?

This is one side of it, and the other is accessible as just the metal, no block work in the way, so literally a thin sheet.

I don't usually deal with commercial buildings like this, so would like a little advice on it really.

I need to fix the cable down the outside and someone has suggested a using a bit of tray, but can only use self tappers down the outside.... so cannot get any better fix than that.



I feel I need some form of gland that will look ok and need to seal the hole up, any ideas?

 

[uksparks]

Thanks Gavin, presumably you get these covers that work in conjunction with cble tray etc? I've just googled it but can only find plastic covers...

 

[davesparks]

An offcut of trunking and a bit of fettling would make you a nice metal one if you wanted

 

[Leesparkykent]

Deck tight or deck mate or whatever you want to call them, google it. This will do the job for cable entry.

 

[davesparks]

I assume you've explored all possibilities for dropping down and coming out below the metal cladding?

 

[uksparks]

Yes it's not really an option due to the way it's done inside, it's a new office unit and they ate not looking for damage.

Fortunately there's a shed load of basket above the false ceiling so can just plop the cable in that with the others, nice and easy really.

 

[davesparks]

What an attractive building to have an office in!

Don't forget it may need LSF cable, steel cable ties, fire sealing when passing through fire barriers on that basket

 

[uksparks]

Fortunately the board is within a cupboard in the office that is on the side of the building, I just need to go up with the other swa and into the basket with other circuits, I'll seal anything up that I affect etc, I think I've worked out what I need now.

I appreciate all your help.

 

[UNG]

Use a Dectite seal or a cable transit if you Google "cable transit" you will get a number of manufacturers in the past I have used the Roxtec and the Hawke transits the Roxtec one being easier to use without special tooling being needed

 

[uksparks]

Thank you, ill take a look.

 

[uksparks]

Ok so I have been to Edmundsons and got a few bits to play with and found what I am going to do.

The next problem I have just come up against is the fact that you cannot get a SP 63A RCBO...

I was planning on taking 10mm from the dist board to an adaptable box on the outside to gland the swa on to. But that first stretch needs to be protected, so now I have the problem of getting a 63A RCBO for the twin and earth.

I was originally going to take SWA from the board to the end point but then taking it through the metal skin of the building is going to look bad taking 10mm 3 core SWA straight out at 90 degrees to the wall and having a huge bend on it outside sticking out.

Any ideas?

 

[driverman]

Can you not soft wire internally, adapt box on outside for SWA?

 

[uksparks]

yes I can, but the cable will then need RCD protection from the board to the adaptable box...

Then that presents the problem of getting a SP 63A RCBO

 

[driverman]

yes I can, but the cable will then need RCD protection from the board to the adaptable box...

Then that presents the problem of getting a SP 63A RCBO

What if internal soft cable was clipped surface / visable? Would it require to RCD protected then?

Edit: Think you may say cable in roof space. What about if room at DB, installing 2 x circuits each protected by 32a RCBO's

 

[uksparks]

The issue is I have to come through a thin steel wall at 90 degrees basically.

 

[uksparks]

What if internal soft cable was clipped surface / visable? Would it require to RCD protected then?

Clipped is not an option, its to sit in a basket above the ceiling.