4mm3 core swa current??

[spark13]

Hi all was wondering if u can help me friend of mine has wired a supply to a shed in 4 mm 3 core swa( using 1 core as the earth ) this is on a 20 amp breaker . The run of the cable is approx 12m with 3-4 metres through a loft space and the rest clipped to a wall outside the load in the shed is approx 6 kw my friend seems to think he will need a bigger cable but another electrician has told him the 4mm saw would be fine to put on a 32 amp breaker thus solving his problems ?
Just looking for your views if you'd be so kind thanks very much for looking

 

[PrenticeBoyofDerry]

what reference method for loft space?

 

[spark13]

The cable is laid on top of insulation going through loft space then goes outside clipped to wall then into shed ? Thanks a lot

 

[PrenticeBoyofDerry]

4mm sound okay, 6kW load would require 26A minus any diversity, so I would say for loading reasons 32A MCB can be used, as the cable can handle that, the volt drop is within the permitted allowance.

 

[JohnW2]

Hi all was wondering if u can help me friend of mine has wired a supply to a shed in 4 mm 3 core swa( using 1 core as the earth ) this is on a 20 amp breaker . The run of the cable is approx 12m with 3-4 metres through a loft space and the rest clipped to a wall outside the load in the shed is approx 6 kw my friend seems to think he will need a bigger cable but another electrician has told him the 4mm saw would be fine to put on a 32 amp breaker thus solving his problems ?

6kw (about 26A) supplied via the 4mm² cable (on a 32A MCB) should be fine, both in terms of current-carrying capacity and voltage drop.

Kind Regards, John

 

[ban-all-sheds]

Hi all was wondering if u can help me friend of mine has wired a supply to a shed in 4 mm 3 core swa( using 1 core as the earth ) this is on a 20 amp breaker . The run of the cable is approx 12m with 3-4 metres through a loft space and the rest clipped to a wall outside the load in the shed is approx 6 kw my friend seems to think he will need a bigger cable but another electrician has told him the 4mm saw would be fine to put on a 32 amp breaker thus solving his problems ?
Just looking for your views if you'd be so kind thanks very much for looking

hi all i am currently studying at college doing the 2330 course

Still struggling with basic cable sizing calculations though?

Just what part of your user ID do you genuinely lay claim to?


And BTW - please use English when posting here.

 

[securespark]

Like BTW and Flaccus, you mean???