While web surfing, noticed a similarity between the American NEMA 10-20R outlet
Hubbell catalog, page A33 and the Australian 20A 3 pin flat earth outlet
Australian Mains plugs varients .
Wondering if these are in fact compatible, physically and as the American one is intended to provide 240VAC@20A 60Hz, almost electrically, difference being both non-ground pins are hot, vs hot and neutral for the Australian outlet. And 50 vs 60Hz.