Swa cable size

[Sid1968]

Some advice electrical distributer as put in a power supply in a purpose built cubicle on a farm.
From the cubicle to the cabin where the powers is required is about 80 metres

What swa cable size is required?? Also want to future proof it incase want to build a house or additional cabins

Thanx

 

[ericmark]

Without load information question can't be answered.

 

[bernardgreen]

There is a calculator that will give you the minimum size needed based on the load, the distance and how the cable is installed.

https://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

 

[JohnW2]

There is a calculator that will give you the minimum size needed based on the load, the distance and how the cable is installed.

Indeed - but if the OPs perceived additional future loads (against which he wants to be 'future proofed') include "additional cabins" and "a house", I think he may be facing an unrealistic task, even if the present supply were adequate to service all those possible additional future loads!

Kind Regards, John

 

[ban-all-sheds]

What swa cable size is required??

Quite possibly big, heavy and expensive.

Why can't you discuss your requirements with your electrician?

There is a calculator that will give you the minimum size needed based on the load, the distance and how the cable is installed.

https://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

No - it won't cope with anything >16mm², and that will almost certainly be too small.

 

[Sid1968]

I was thinking of 35m2

 

[JohnW2]

I was thinking of 35m2

80m of even that would (if single phase) only allow you something approaching 70A (which may not be a lot for "a house and several cabins") if you wanted to stay within the 3% voltage drop guidance for any lighting at the end of the run, quite apart from other considerations. ... and it would obviously cost a good few bob!

How much capacity does the supply have which would be feeding this? Is it a single-phase or 3-phase supply?

Kind Regards, John

 

[securespark]

Is there a reason the supply was not put closer??

 

[JohnW2]

Is there a reason the supply was not put closer??

I would imagine that the supply goes to a farmhouse and/or other farm buildings and that the various possible 'cabins' and 'a house' are distant from that supply. However, the OP can presumably clarify.

I would also think that if an additional house ever appears, that will be a matter for the DNO, not a case of running a supply from some existing installation.

Kind Regards, John

 

[Sid1968]

Thanx for all the advice
The cable has to go through farm land thats why the dno install it near to source to a single phase supply to a cabin a cabin with one socket and a light