From:ISBN 0-8306-1420-6 TAB Books

The Handbook fo electronic Safety Procedures

Chapter #2 "Electric Shock, Unsafe at any Voltage"

Page 10: "Fatalities have occurred at voltages as
low as 24 volts ac, which shows that almost no
volatge can be considered safe if adverse circumstances are
present (if, for example, you are sweating profusely
or you are standing in water)"

"Just how badly you are affected by an electric shock
depends on the following primary factors:

1) the amount of current measured in milliamperes
that flows through the body

2) The path that the current takes from entry to exit from
your body

3) The time, measured in milliseconds, you are in the circuit."

"The resistance may vary from 300 ohms to
100,000 phms, depending on the thickness of your
callouses, if any, amount of eprspiration, your age,
the area of electrical contact, and the path the
current takes through your body

If the skin is broken or cut, the resistance may be as
low as 300 ohms. Although resisatnce varies
from moment to moment and from person to person,
at 500 ohms you cannot safely touch more than 9 volts

As resistance decreases, the current increases.
Between 1 and 6 mA you may recieve just a 'tingle'"

Based on Experiments performed by Charles F. Dalziel at the
University of CAlifornia at berkely.... "the safe let-go
currents are now considered to be 9 ma for men
and 6 ma for women"

Let-go level means a level where anyone could let go of a shock
and despite the tingling of the shock..

"The effect of severity of the shock
depends also on the current's path through
your body."