On 2008-02-03, Stephen Robinson wrote:
Carl Byrns wrote:
"Stephen Robinson" wrote in message
...
That suits me. Under the right conditions, 48 volts is plenty enough
to kill. Therefore, one inevitable result of 48 volt electrical systems
in cars will be the occasional dead mechanic.


How will 48v kill people, except for causing a fire, which 12 v is quite
capable of doing that also.

Do you own an arc welder? Look at the open circuit voltage(should be on the
case somewhere). Now look at all the shock hazard warnings.

If you don't own an arc welder the open circuit voltage is usually around 48
volts and arc voltage is around 25 volts (sound familiar?) and at the right
amperage that is enough to kill you.

-Carl


You need the VOLTAGE to to push the CURRENT in order to kill
someone(approx 30 mA).The human body is a very high resistance object,
which needs very high voltage to provide that current. 48v ain't gonna
be enough.

Not the case if a wet human body is holding on to car frame, while
grabbing firmly some unlucky item energized to 48 volts. Resistance
depends mostly on how contact is done.