At the end of the day it doesn't matter, it just is.
Welcome to the sitehave to use a better estop circuit as to meet regulations anyway.
All devices have a resistance
All devices have a resultant load (current)
The PUSH is the Voltage
As far as Australia is concerned we are the same sized country as the mainland of USA.
But we only have 20 million people living here
This means we need to push power further between power stations, hence, we use a higher voltage
The reason we have a lower frequency . I don't care really