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

Nano Brewery
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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    AJJewsbury:


    It might be that some heat-resisting cable plus some additional protection (say in flexible conduit) might be more appropriate. Or maybe something more substantial is needed to protect from impact damage (e.g. steel crash barriers) - if large heavy hard thing with sharpish corners are moved about carelessly. We just can't tell from here.




    Cheers Andy.  You've got me thinking H07RN-F (Can be supplied suitable for up to 90°C upon special request) with either Adaptaflex or Kopex liquid tight conduit (both steel) would be a more suitable option.  A fair bit pricier but probably ticks all the boxes?!?


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