For his points about safety re touching 120v vs 240v, both are just as capable of being lethal. The whole "it's not voltage that kills it's current" is a tired line that gets repeated ad nauseam. You can hold a 1mV 10A power cord in both hands and nothing will happen because the voltage is not high enough to overcome your body's resistance. High voltage WITH high current kills.
The sockets in the US can provide 15A, 240V systems provide 10A. Lets say your body resistance is 100,000ohm (going off the high end)
120v/100,000*15= 18mA
240v/100,000*10= 24mA
10mA across your heart is already enough to cause death.
TL;DR don't touch either damn system, neither is "safer" than the other in terms of you becoming part of the circuit.
These days, insulation is good enough and safety devices like RCDs are mandatory (I believe also in the US?), so it's largely a moot point either way. If you had the chance to design a country's electrical grid from scratch, you'd probably opt for higher voltage lower current after the main distribution points, but I don't know of any major benefits of one over the other either way.
The sockets in the US can provide 15A, 240V systems provide 10A. Lets say your body resistance is 100,000ohm (going off the high end)
120v/100,000*15= 18mA
240v/100,000*10= 24mA
10mA across your heart is already enough to cause death.
TL;DR don't touch either damn system, neither is "safer" than the other in terms of you becoming part of the circuit.
These days, insulation is good enough and safety devices like RCDs are mandatory (I believe also in the US?), so it's largely a moot point either way. If you had the chance to design a country's electrical grid from scratch, you'd probably opt for higher voltage lower current after the main distribution points, but I don't know of any major benefits of one over the other either way.
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