Electronics > Beginners
Is there a particular reason Japan is 100 volts?
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janoc:

--- Quote from: tooki on August 30, 2018, 09:50:41 am ---And of course, there were also some system voltages that simply died out over time. Isn’t there still some weird low-frequency AC in some parts of USA for industry or something?

--- End quote ---

You mean like Switzerland's (and also Austria's and Germany's) 15 kV, 16.7 Hz railway overhead wire voltage?
langwadt:

--- Quote from: GeorgeOfTheJungle on August 30, 2018, 09:13:16 am ---
--- Quote from: Alex Eisenhut on August 30, 2018, 02:46:54 am ---Not as exciting as what they do in Brazil!

--- End quote ---

What do they do in Brazil?

--- End quote ---

https://www.worldstandards.eu/electricity/plug-voltage-by-country/brazil/ ?
IanMacdonald:
The EU 230v is a piece of pure bureaucracy. It's actually 247v here. Notionally 240 +-6%. Many parts of Scotland have slightly high voltage, probably to allow for transmission drops.

High-ish supply voltages used to be a cause of frequent equipment faults in the days of valve equipment, since there often wasn't much tolerance on electrolytic cap ratings, etc. 

Interesting case here:
glarsson:
What I get out of the wall sockets certainly changed. Before the EU change the voltage was a bit above 220V, now it is a bit above 230V. Usually I see about 235V.
Seekonk:
The first US standard was 166.6 Hz.
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