Well heres my nickels worth.
Generally the human body has between 800-1000 ohms resistance as typical. Body internal resistance, contact resistance, moisture,duration of voltage, as well as the path of the current, we always tell our apprentices 'Right hand right.
According to our little handy chart: 16ma shock is painful just about to the point where you cant let go called" threshold" You may be thrown clear.
23ma shock painful severe cant let go- muscels immobilize- breathing stops
1000ma ventiricular fibrillation(usually fatal)length of time.....0.03 seconds
at 100ma 3.0 second duration.
Generally voltages of less than 40 volts to ground are considered safe. Voltages 50 volts and greater is considered lethal.
And we are required to ground for voltages higher than 50 volts according to 250.20(B)
a 9ma shock is Painful-but can still let go.
Seems to be some misinformation out there.
Mark
