Why is the voltage 110v in some parts of the world and 240v in others?
Wouldn't it be easier all round if everyone in the world used the same voltage so we didn't need step up/down transformers etc?
Answers:
It is even kinda funnier then the other two answers. We went from 110 to 120 (as 220 became 240 when 440 went to 480)!!!
The bigger problem is not the VOLTAGE as you can see, they are all just halved. The real problem from here to most European countries is the FREQUENCY. We use 60 Hz current in the US, they use 50 Hz. So you need adapters to use a US 120VAC 60Hz product on a 220 VAC 50 Hz circuit.
Why? Why are they on the metric scale while we use a weird mix. They are pretty well standard. We have SAE, IEEE, miles,feet,inches etc. They just move the decimal point.
Other answers:
Good question. I'm sure there is a historical reason. Next question, who's going to change? Probably people on the 100-127V systems, since most of the world uses 200-240V
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