Re: Cavalier Attitude (Setting the record straight)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Alexander Rice by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ajjrice-at-yahoo-dot-com>


Just to add that when you are hit by an arc of some sort it will heat and
damage the tissue at the points of entry and exit greatly decreasing the
toal resistance - hence the dangers of MOT's and such - if your body's
resistance was really xMegOhms and stayed that way it would be fine, in
reality it is mostly contact resitance and as i say - arcs reduce this
greatly

Be careful and remember Darwin's theories of natural selection

Alex



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, June 26, 2001 4:51 PM
Subject: RE: Cavalier Attitude (Setting the record straight)


> Original poster: "Ray Haynes by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<ray.haynes-at-home-dot-com>
>
> Had enough antidotal evidence? Here is some "shocking" data from a
Tektronix
> "Biophysical Measurements" book.
>
> For 60Hz Arm to Arm >
> 300uA Threshold of sensation
> 1mA Threshold of pain
> 10mA Can't let go
> 100mA-3A Ventricular fibrillation and PROBABLE DEATH
> >3A Severe burns and shock
>
> Ventricular fibrillation is produced by current directly through the heart
> during a specific portion of the cardiac cycle know as the "vulnerable
> period". The vulnerable period for ventricular muscle occurs during the
> upstroke of the T-wave and a single shock impulse lasting for LESS THEN
0.1
> second could cause ventricular fibrillation if received during this
> vulnerable period.
>
> Skin resistance can vary between 20K and 200K ohms for normal DRY hands.
The
> lower layers of skin have around 1000 ohms of resistance which comes into
> play when the outer layers are WET.
>
> -------------
> In conclusion, dry skin and a couple of thousand volts with 100mA of
> available current WILL probably kill you. With wet skin under a 100 volts
> could do the trick. Also a single very quick pulse, like a discharge from
a
> cap, can be enough to cause ventricular fibrillation, i.e. DEATH. And this
> is not taking it to account any injuries caused by the involuntary muscle
> contraction caused by the shock.
>
> Electricity doesn't kill people, but carelessness can.
>
> Ray
>
>


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