wet electric

[spenny]

whats the thoughts on an wet 12.5kw system being installed in a house with a 9.5kw shower already in situ wired in 10mm, the heating contractor's pack has a contactor that is wired from the load side of the 45a pull switch , he says in a 1mm cable , i say it need's come from 45a in 10mm , be fused down to 3 or 5 amp then wired 2 contactor , but 2 10mm in the load side ,, aye right ,, anyone any solutions????

 

[bugsy]

10mm feed to contactor Via 45a isolator , 10mm from contactor to load, 1mm from switch to coil ( 6a ocpd - could be from lighting circuit)