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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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    Mind you the one time H07 and similar non shielded 'soft' flex are used (and used by the mile)  are the film industry, and events like pop festivals and concerts, where it gets a real beating, being run over and knotted and quite often pulled about with fair robustness during installation as well  -  and it is in fact surprisingly robust. But yes, you do expect to see ferrules, and the right sort of cord grips at each end.

    You may well want something of that sort at least for the last hop from isolator to immersion heater. But I'd certainly agree, it is not common for fixed wiring, where something with a harder jacket and less finely stranded cores is expected.

    Mike.
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  • 0
    Mind you the one time H07 and similar non shielded 'soft' flex are used (and used by the mile)  are the film industry, and events like pop festivals and concerts, where it gets a real beating, being run over and knotted and quite often pulled about with fair robustness during installation as well  -  and it is in fact surprisingly robust. But yes, you do expect to see ferrules, and the right sort of cord grips at each end.

    You may well want something of that sort at least for the last hop from isolator to immersion heater. But I'd certainly agree, it is not common for fixed wiring, where something with a harder jacket and less finely stranded cores is expected.

    Mike.
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