First year practical exam,need help.

[Delta]

Hello,
I've got a practical exam on thrusday and need some guidance on a part of it.

I've got a ring final circuit consisting of 4 twin sockets with a fused switched connection unit to be connected as a spur to supply a pre-wired tubular heater.

As I've not been given any details of the heater I'm not sure what size conductor I'm going to need.

Thanks in advance,

Tim

 

[CT13]

It was 4mm CSA singles in plastic conduit when i did mine but it was also run radially off the ditribution board as a seperate circuit and not spurred off the ring.

I would enquire as to the rating of the water heater, ours was 3 kW.

 

[Delta]

We have a separate 3Kw immersion heater circuit to put in aswell, which I would say needs a 16A type B breaker and 2.5mm FTE cable.Would I be correct in saying that?