What's the reasoning behind that?.The maximum charge you can use on single phase is currently 20 amps
So QLD electricians are not allowed to install circuits in excess of 20A in the 1p context?.
I know my electrician in NSW was reticent to install more than a 20A 3p circuit. I tried to talk him into more than that but he said 20A was all I needed for the Gen3WC. I wonder if there are special regulations attached to >20A circuits which are State agnostic?