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Topic Title: split supply
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Created On: 28 October 2008 08:25 PM
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 28 October 2008 08:25 PM
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carlosreid

Posts: 11
Joined: 14 July 2004

Hi all, went to look at a job today, the owner wants to convert a house into 2 flats,
not done anything like this before.
100 amp fuse, TN C S supply.
Can I split the 1 supply for the 2 flats, he would like a landlords meter for the second flat, so he could then work out the bill for each flat,
each flat will have 2 x 32A and 2x 6A circuits .
Or have a new supply put in for the top floor flat?
He would like to keep the cost down.



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snoop
 28 October 2008 08:28 PM
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spm

Posts: 194
Joined: 23 October 2005

new supply really oh and apply early like now, espesially in london, you wont believe the griev i had ,
 28 October 2008 09:12 PM
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Avatar for Inrush.
Inrush

Posts: 699
Joined: 19 December 2007

Carlosreid can you clarify the design loads proposed for each flat i.e. 2x Ring, 2x Lighting?

Assuming you have the above arrangement you could use the existing supply and sub meter each flat:

First Flat

Ring 1 = 32A
Ring 2 = 32A x 0.4 (Diversity Factor) = 12.8A
Lighting 1 = 2A (Assumed load with diversity applied)
Lighting 2 = 2A (Assumed load with diversity applied)

Second Flat

Ring 1 = 32A
Ring 2 = 32A x 0.4 (Diversity Factor) = 12.8A
Lighting 1 = 2A (Assumed load with diversity applied)
Lighting 2 = 2A (Assumed load with diversity applied)

Total load on DNO = 97.6 Amps

Obviously if you have other demanding loads such as showers or cookers then a new supply could be required.

However it would probably be more economical for the existing supply to be utilised (owing to the cost of getting a new supply installed /existing upgraded to three phase) and any other requirements for water heating /cooking to come from non-electrical services (gas /oil).

Edited: 28 October 2008 at 09:16 PM by Inrush
 28 October 2008 09:29 PM
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spm

Posts: 194
Joined: 23 October 2005

if the flats are to be registered seperatly ie address and have different water supplies or gas then two supplies would be needed, if not as said you could split the supply
 28 October 2008 09:36 PM
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carlosreid

Posts: 11
Joined: 14 July 2004

As i understand each flat will have its own water and gas supply,

1 32a ring
1 32a cooker
1 6a lighting
1 6a smoke alarm

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snoop
 28 October 2008 10:22 PM
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spm

Posts: 194
Joined: 23 October 2005

why not convince client to do electric as well then the properties could be sold seperatly at a later date , iam pretty sure you cant share the supply if other services are diff, due to possible faults but i couldbe wrong there will be someone on here who knows for sure and why,but it just seems like a halfway job not to do it all properly after all the cost of a new gas and water supply is often more than the elecric,
good luck with it.
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