Here in the USA, about half of the power cords on household things have
3 prongs, and the others have 2 prongs.I was looking for some New Zealand / Austrailian power cords for something I am building. Seems like 99% of the sites selling cords for that area have only 3 prongers. Is 3-prong the standard for NZ & Aus plugs? Do all electrical appliances there have an earthground?