[NSRCA-discussion] Max volts

[Atwood, Mark]

From a high voltage safety document…

“Voltages of greater than 50 V applied across dry unbroken human skin are capable of producing heart fibrillation<http://en.wikipedia.org/wiki/Fibrillation> if they produce electric currents<http://en.wikipedia.org/wiki/Electric_current> in body tissues which happen to pass through the chest<http://en.wikipedia.org/wiki/Chest> area.[citation needed<http://en.wikipedia.org/wiki/Wikipedia:Citation_needed>] The electrocution<http://en.wikipedia.org/wiki/Electric_shock> danger is mostly determined by the low electrical conductivity<http://en.wikipedia.org/wiki/Electrical_conductivity> of dry human skin. If skin is wet, or if there are wounds, or if the voltage is applied to electrodes<http://en.wikipedia.org/wiki/Electrode> which penetrate the skin, then even voltage sources below 40 V can be lethal if contacted. “

The reality won’t likely be  a lethal issue, but burn factor is already pretty high even at 42v with these big packs.  40C  packs discharge extremely rapidly.


Mark Atwood
Paragon Consulting, Inc.  |  President
5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124
Phone: 440.684.3101 x102  |  Fax: 440.684.3102
mark.atwood at paragon-inc.com<mailto:mark.atwood at paragon-inc.com>  |  www.paragon-inc.com<http://www.paragon-inc.com/>

From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bob Richards
Sent: Monday, March 01, 2010 4:53 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Max volts

Well, the body is not a perfect conductor. It would take way more than 40v to cause any appreciable current to flow, IMHO.

--- On Mon, 3/1/10, Atwood, Mark <atwoodm at paragon-inc.com> wrote:

Actually very true.  But picture someone trying to save weight and combining two 6s packs to one connector and accidently “touching” something in the process.  That will pull a 200amps peak @ 50V…enough to get crispy.



Mark Atwood
Paragon Consulting, Inc.  |  President
5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124
Phone: 440.684.3101 x102  |  Fax: 440.684.3102
mark.atwood at paragon-inc.com<http://us.mc11.mail.yahoo.com/mc/compose?to=mark.atwood@paragon-inc.com>  |  www.paragon-inc.com<http://www.paragon-inc.com/>

From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bob Richards
Sent: Monday, March 01, 2010 2:00 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Max volts

But everyone knows it is current, not voltage, that kills. :-)

(I am just joking, BTW.)

Bob R.

--- On Mon, 3/1/10, Atwood, Mark <atwoodm at paragon-inc.com> wrote:

Biggest problem with raising the voltage is that 40v is generally considered the max non lethal voltage.    You'll be hard pressed to get a voltage increase for general safety reasons.

I'm sure that's why the current limitation  is in the general guidelines in the first place.
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