[VAC] Re: AC/DC question

["Dr. Gerald N. Johnson, electrical engineer" <geraldj@xxxxxxxxxx>]

The bigger problem with the hot 120 hooked to the trailer ground is that
it zaps people (and pups) when they touch the trailer while standing on
the ground. 120 volt shocks are more hazardous than higher voltage
shocks because 120 volts tends to put the heart into fibrillation and
there's no natural way OUT of fibrillation. You get about 4 minutes to
get to a defibrillator or good CPR and I'm not sure about the
effectivity of CPR when the heart is in fibrillation before the brain is
dead from lack of blood circulation. Higher voltage shocks (while
tending to produce burn injuries) tend to stop the heart and merely
falling over can be enough kick to start the heart again. CPR works well
when the heart has stopped.

Gerald J.