Feeding a out building 77mtrs | Page 3 | on ElectriciansForums

Discuss Feeding a out building 77mtrs in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

max vd = 3% of 230 = 6.9
max mV/A/m = 6.9/(77x35) = 2.56 mV/a/m(i used 35A as Ib, no diversity applied)

so 10mm is not suitable, but 25mm2 is.


whats your Ze at the main board, so we can see iof iot will meet disconnection times?

Going to use 16mm 3 core swa and have a 100m/a rcd with time delay,and 30 m/aRcd protected board in outbuilding to omitt tripping back at main board,Obviously earthing the sheathing.

so your going to ignore Vd.

Whats your Ze?
 
That reminds me of the outside bogs down under (very painful down under):-------:
:38:

You don't get that problem with European toilets, they're so low that you fall over & crack your head. Then forget what you went in there to do in the first place. :oops: (Well I did anyway):tounge_smile:
 
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