well from my personal experience i had 440+ try to pull me in but somehow or by the hand of my lord i only suffered a 2nd degree flash burn, and humans probably could only handle 110-220volts without serious injuries. Could be wrong...
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10V would require very thick (and therefore expensive) cables because the current required to supply a given power would increase by over 10 times. 1000V would be very hazardous under fault conditions (and even non fault conditions) but would only need thin cables, although the insulation required would be considerable.
Somewhere in between these two values is a region of acceptable cable size and safe enough voltage to be in a house.
In fact 110V is probably on the low side. I understand that US kitchens don't have electric kettles. This is down to the current required to deliver nearly 3000W to a kettle which is what you need to boil in a decently short time. The current needed for this is 25A in the US, whereas in Europe at 220V it is only 13A and so virtually every house in the UK has an electric kettle.
Somewhere in between these two values is a region of acceptable cable size and safe enough voltage to be in a house.
In fact 110V is probably on the low side. I understand that US kitchens don't have electric kettles. This is down to the current required to deliver nearly 3000W to a kettle which is what you need to boil in a decently short time. The current needed for this is 25A in the US, whereas in Europe at 220V it is only 13A and so virtually every house in the UK has an electric kettle.
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its not worth the time and money for every house to change. and it works just fine and dandy.