[Beowulf] Newbie Question: Racks versus boxes and good rack solutions for commodity hardware

Robert G. Brown rgb at phy.duke.edu
Sun Dec 14 20:30:19 PST 2008

On Sun, 14 Dec 2008, Geoff Jacobs wrote:

> Yes, it is possible to kill yourself with low voltage. You have to
> really work at it and/or be unlucky, but it can be done. A DC resistance
> from leg to arm of 100 ohms or so is hard to achieve. Stabbing oneself
> with electrified needles, for starters.

As in:


Improving the human race one incident at a time...

There was also the joy of touching a 9V battery across the tip of your
tongue (safe enough, but more than enough to convince you that 9V can
make you go "Ow").  Or the dangers of 12V batteries in a saltwater
environment or even when it is raining and your hands are wet and your
skin is maybe a bit split when you grab one by the posts.

As I said, do NOT mess with even "low" voltage electricity unless you
know things like what a conductor is, or you too might qualify for a
Darwin!  And we'd hate that...:-)


Robert G. Brown	                       http://www.phy.duke.edu/~rgb/
Duke University Dept. of Physics, Box 90305
Durham, N.C. 27708-0305
Phone: 1-919-660-2567  Fax: 919-660-2525     email:rgb at phy.duke.edu

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