Effects of Electrical Shock Current is the killing factor in electrical shock. Voltage is important only in that it determines how much current will flow through the body's resistance. Electric utilities classify effects of current if it breaks through the skin, since that risk can occur in emergencies. The following table summarizes effects of 60-hertz current on an average human body for that situation. No sensation 1-8 milliamperes Sensation of shock.
Person can let go.
8-15 milliamperes Painful shock. Person can let go at will, if muscle control not lost. 15 to 20 milliamperes Painful shock. Muscle control to adjacent muscles lost. 20-50 milliamperes Painful.