It's interesting, and I'm learning a lot too. I have designed,(and partly built) units for export to USA, Australia, and other countries. Only the US marked has been a challenge because of their own standards so different from Europe.... or actually not when you learn it to know. Most US 480V machinery will run at 400V 50 hz and visa versa. 20% more power out in the 480V system, but it works, and no smell of burned equipment :-)

dsk