<p>I work on trucks that have 4 900cca batteries wired in parallel. On a hot sweaty day 12v running down your arm is down right uncomfortable. Getting hit with a quad flash strobe set up will make a guy mean the rest of the day. </p>
<p><blockquote type="cite">On Aug 20, 2010 1:10 PM, "Atwood, Mark" <<a href="mailto:atwoodm@paragon-inc.com">atwoodm@paragon-inc.com</a>> wrote:<br><br>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">From Underwriter Lab documents….</span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt"> </span><span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt">Testing in 1950s determined that a </span><span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt">shock and let-go value of not greater than
42.4 volts was </span><span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt">an acceptable level in most dry locations
and would not </span><span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt">be lethal to a person in contact with the
circuit. </span><span style="font-size:11.0pt">This</span><span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt">value of 42.4 volts peak would not be
acceptable in a wet </span><span></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt">location since the resistance of a person’s
body would be </span><span></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">much
lower in a wet condition.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">It’s extremely person to person dependent. Our skin resistance
varies wildly and the difference between Dry skin and Wet skin is something
like 100,000 ohms to 1,000 ohms. Sort of a wide range.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">But again, the “generally accepted” safe low voltage is 40V, or
in the case of UL Listing, 42.4.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">I have to believe that played a big role in the FAI guideline
initially of not exceeding 42V.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">AC current is different, both more and less lethal. More
because it fibrillates the heart, but less because you have a chance of letting
go. Very situation dependent. </span></p><p><font color="#500050"><br><br> <br><br> <br><br> <br><br>Mark Atwood<br><br>Paragon Consulting, Inc. | President<br><br>5885 Landerbrook Drive Suite 130, Cl...</font></p><p class="MsoNormal">
<span style="font-size:8.5pt;color:#1351F3"><a href="mailto:mark.atwood@paragon-inc.com" target="_blank">mark.atwood@paragon-inc.com</a>
</span><b><span style="font-size:9.0pt;color:black">|</span></b><span style="font-size:8.5pt;color:black"> </span><span style="font-size:8.5pt;color:#1351F3"><a href="http://www.paragon-inc.com/" target="_blank">www.paragon-inc.com</a></span><span style="font-size:11.0pt;color:#1F497D"></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt">
<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org" target="_blank">nsrca-discussion-bounces@lists.nsrca.org</a>
[mailto:<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org" target="_blank">nsrca-discussion-bounces@lists.nsrca.org</a>] <b>On Behalf Of </b>Bob
Richards<br>
<b>Sent:</b> Friday, August 20, 2010 12:01 PM<p><font color="#500050"><br>To: General pattern discussion<br>Subject: Re: [NSRCA-discussion] Question.</font></p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">>>>The
voltage in a battery is not the lethal element, current of Amperage
is.<<<</span></p>
</div><p><font color="#500050"><br><br> <br><br>So are you saying that a 1 cell 5000mah pack is dangerous enough to kill 1000 people? :-)<br><br> <br><br>A...</font></p></td>
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<p class="MsoNormal"><span style="font-size:10.0pt"> </span></p>
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