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Radial Voltage Drop Calculation?... By Load or MCB Rating?

I'm doing the calculation for total voltage drop. I have 14 radials/ways going out. As I understand it, that would equal a max allowance of 0.285% voltage drop per radial/way. Or some sort of mixture throughout not exceeding the 4% drop allowance overall. Firstly, is this correct?

Secondly, should I be doing my calculations based on actual Load or the MCB ratings of the individual radials/ways?

Thanks in advance!

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0 Nano Brewery over 4 years ago

Thanks all. Oh right!?... I was of the understanding that the allowance is for the whole installation?...

https://www.tlc-direct.co.uk/Book/4.3.11.htm
Qoute form Example 4.8 from the above link:- "It is important to appreciate that the allowable volt drop of 4% of the supply voltage applies to the whole of an installation. If an installation has mains, sub-mains and final circuits, for instance, the volt drop in each must be calculated and added to give the total volt drop as indicated in {Fig 4.10}."

...is that incorrect? Cheers!
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0 Nano Brewery over 4 years ago

Thanks all. Oh right!?... I was of the understanding that the allowance is for the whole installation?...

https://www.tlc-direct.co.uk/Book/4.3.11.htm
Qoute form Example 4.8 from the above link:- "It is important to appreciate that the allowable volt drop of 4% of the supply voltage applies to the whole of an installation. If an installation has mains, sub-mains and final circuits, for instance, the volt drop in each must be calculated and added to give the total volt drop as indicated in {Fig 4.10}."

...is that incorrect? Cheers!
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Radial Voltage Drop Calculation?... By Load or MCB Rating?

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