I worked as an electrical civil engineer for few years.
>> the world needs a low voltage standard
we have high voltage standard because it means we can have low amperage to transit same VA.
Because voltage doesn't kill, amperage does.
It's for safety.
DC is far more safer then AC, but it's not that much safer.
If we convert 20A 240V AC (very bad, you can't move your hands away) to 48V DC we get a wooping 110A (instant death)
But if we convert 20A 120V AC, we'd get 55A 48V DC. It's on the same level and has the same problem with moving your hands away.
My country used 220V (as most do!) so switching to DC would mean huge safety threat, but for 120V countries I'd say – go for it!
Not an electrical engineer, but doesn’t the voltage combined with the bodies resistance dictate the amperage? So anything under 50VDC just can’t transmit enough amps through the body to be harmful?
>> the world needs a low voltage standard we have high voltage standard because it means we can have low amperage to transit same VA.
Because voltage doesn't kill, amperage does. It's for safety.
DC is far more safer then AC, but it's not that much safer. If we convert 20A 240V AC (very bad, you can't move your hands away) to 48V DC we get a wooping 110A (instant death)
But if we convert 20A 120V AC, we'd get 55A 48V DC. It's on the same level and has the same problem with moving your hands away.
My country used 220V (as most do!) so switching to DC would mean huge safety threat, but for 120V countries I'd say – go for it!