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Topic Title: SUb mains to flats, whats the norm
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Created On: 01 November 2013 09:35 PM
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 01 November 2013 09:35 PM
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Grandfortune

Posts: 350
Joined: 10 April 2007

hi all,

been reading various posts on sub mains to flat but cant seem to find the best method

what would you recommend, looking at drawing to price and looks like there is a ducting for electrical and plumbing services.

just wondering if to use SWA or concentric

your thoughts please

Cheers
Grand
 01 November 2013 10:02 PM
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leckie

Posts: 1872
Joined: 21 November 2008

Well let's say you use swa; and you are going to terminate this into an insulated consumer unit, how? I would prefer PVC/PVC on cable tray/basket. Lot easier to terminate. Care of design must be taken to avoid the need for rcd protection for the sub-main otherwise swa or similar may be required
 01 November 2013 10:20 PM
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OldSparky

Posts: 592
Joined: 28 June 2011

i use sy flex where possible
 01 November 2013 10:20 PM
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OldSparky

Posts: 592
Joined: 28 June 2011

i use sy flex where possible
 01 November 2013 10:31 PM
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largelunchbox

Posts: 373
Joined: 06 July 2008

Originally posted by: leckie

Well let's say you use swa; and you are going to terminate this into an insulated consumer unit, how? I would prefer PVC/PVC on cable tray/basket. Lot easier to terminate. Care of design must be taken to avoid the need for rcd protection for the sub-main otherwise swa or similar may be required


cant see what the problem is or issue with terminating a swa into a con unit?
 01 November 2013 11:21 PM
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Grandfortune

Posts: 350
Joined: 10 April 2007

I can't see it being easy to terminate tbh
 02 November 2013 12:23 AM
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aatomic69

Posts: 20
Joined: 23 August 2013

Where is the meter situated? In flat or at point of incoming supply to building (communal meter area)
You would normally use concentric cable to a point of isolation in the flat ie a red link fuse. Then into meter then to consumer unit.
Or if meter was downstairs in communal area- From meter to switch fuse(providing over 3m run) then SWA or cable of choice to consumer .
 02 November 2013 03:22 AM
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MrP

Posts: 843
Joined: 24 March 2006

Hi Grand

There are two posts running at present sub mains

Its Split con for me its cheaper than SWA, its lighter, goes in faster you dont need a gland.

Works for me and has done for many apartment blocks

MrP
 03 November 2013 09:35 AM
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Grandfortune

Posts: 350
Joined: 10 April 2007

Thanks guys,

Mr P, what do you do about RCDing it, i used to do flats a while back and we did use split con, it was so nice to work with and i agree a lot faster, i assume if i make sure i adhere to the 50mm rule i dont need to rcd, am i correct?.

thanks again
grand
 03 November 2013 12:24 PM
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MrP

Posts: 843
Joined: 24 March 2006

Grand

Don't bury it keep it surface no problem if you have to come down to a CU nice bit of trunking or use a wooden board butt up to the ceiling to mount the CU and hide all the final cables keeping 51mm clearance it works and complies

MrP
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