voltage drop

[ample current]

If im running an armoured cable to a garage that is to be converted to living accomadation, i was thinking of running a 6mm armoured cable out of the original house clip along the wall outside and into the garage conversion to a small 2 way sub board. do i simply work out the VD of the 6mm cable then add it to the VD of the new lighting circuit in 1.5 in the garage conversion.
Thanks

 

[johnboy6083]

I would design the submain with 3% volt drop max, and then allow 3% for the final circuit. Obviously this would be dependant on the supply voltage being acceptable.