The real history of why 60Hz and much more
Morgan Olsson email (remove spam text)
Thank you Martin McCormick, good points.
One addition note:
Until about ten yeras ago some countries in Europe had 220V Nordic, Germany(?)), other had 240V (GB, France...)
Now all(?) have officially 230V, and all new installations are made to deliver 230.
All old units still work, as 230V (plus variation) is within spec of both 220 and 240V old appliance)
Nice middle road.
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