Checking installation methods of RFC

[Adam W]

A ring final circuit serving two single socket outlets seems daft to me.

I'm not too sure what OP means by "blow heaters" - I took that to mean some kind of fan heater; turns out he wants to put free-standing heaters on the floor which can be cleared away so they don't get knocked over. I would have been more inclined to use 3x 2400W (probably infra red) heaters at high(ish) level per ring, x2. I've done this before and nothing burned out since the heaters were designed to work through a 13A fuse.
It seems he's intent on going for individual 16A radials wired in conduit as a temporary measure for 3 weeks at a time when heating may not even be required at all.

If any alterations are going to be made to this setup it's likely to be that the commando sockets are changed for BS1363 to make them more flexible, eg so the cleaner can plug in a floor polisher or vacuum cleaner, whereas hard-wiring everything permanently makes it more of a 'dedicated circuit'.

The whole thing seems daft to me.

 

[Adam W]

I am mate, but I would prefer it if the suggestions complied with the rule book.

Meaning what exactly? Where does BS7671 give a value of nominal voltage as 230V, or for that matter any figure other than low voltage "Exceeding extra low voltage but not exceeding 1000Vac or 1500Vdc between conductors, or 600Vac or 900Vdc between conductors and earth"?
Have you actually measured the voltage in this sports hall of yours or are you just going to guess?

 

[Ian1981]

It’s very difficult to design a circuit to a voltage that can vary so using 230 v and designing to this voltage for calculating loads and volt drop gives us a good safety margin to design too I find.
That said some manufacturers put 240 v on the information plates so in that case I use that.

 

[Toneyz]

See appendix 2 from 1995 230v is the nominal voltage that tables and calculations are worked out from.