Wiring bathroom downflow wall heater?? help please.

[bleach]

Hi all, I am new to this site. I have a 2kw soneva bathroom downflow wall heater that I want to get installed. I would like to do the cable runs myself and get an electrician to check and connect up.

My question: I have sorted the location requirements for the heater. I plan on fitting a 13amp switched FCU outside the bathroom then cable to a flex out-let not quite directly above the heater and butt to the ceiling (to save chasing or trunking). From this I need a flex to the heater. Shall I use 1.0mm or 1.25mm flex and does it need to be 2 core or 3 core? its just that there is no earth terminal on the heater?

Does all this sound ok? I can do it like this without a ceiling pull cord can't I? (with having swittched FCU outside bathroom instead?

Any help appreciated guys!

 

[followgers]

I'm surprised that the heater does not come pre-wired with a length of flex. It is almost certainly double insulated (electrical symbol of a square inside a square) is this is the case, it should not have an earth connection to the mains. When running 8.7 amps, 1.0mm would be fine as 2 core 1.0mm heat flex has a current rating of 10amps. Hope this is of use to you.