Re: also I still don't get what advantages 110v has
As a general rule yes, but not entirely the case.
Very high currents can be survived with no ill effect if the voltage is too low to overcome the body's resistance, i.e. the amps can't get into your body. Do not try this but one can put clean dry hands on either terminal of a car battery (many of which can produce upwards of 600A) and not feel a thing.
Ultimate it's energy that kills, power (voltage x current) applied for long enough time.
Biting the hand that feeds IT
