Great insight guys!
I am installing 8Kw instant heater (Stiebel Eltron DHC8EL), which is rated at 8Kw@220V (or 8.7Kw@230V). If I calculate correctly, this means it will draw approx 26-27Amps.
If I installed a 30A CB using 4mm wire inside a conduit across 10m distance, with an isolator switch within 1m of the heater, would this be sufficient?
Your help would be greatly appreciated.
Thanks
Quentin