Power Supply Req: Need 20A 240V
Dude: Don't monkey wire this up.  There's no way you;re going to get 16 amps at 240 out of a 10 amps outlet.  I understand in the down under your convenience outlets are at 230 or 240, if not, and you are at 120, it's even much worse. But still, whatever you are supplying, do it right.  The approach of parrallelling  two transformers to deliver the needed amperage.... that would require them  to be on the same phase forever. That is a hack job. Just run the correct cable and breakers and sleep easily.