Posted: 8/8/2006 2:27:33 PM EDT
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Its been a while since I've been hit. And this time I wasn't even doing anything that should have warrented it. I have one of those IDE->USB adapters and am working with a hard drive. There are two parts to this thing. The actual USB dongle, and then a power bring to run the drive. I have the drive happily sitting on a metal rack (which is indirectly grounded by the computer cases sitting on it) while it transfers files. I pick up the drive and my fingers are touching the drive and my kuckles touch the rack and I get pinpricks of pain. Ow, I instantly know I have been electrocuted by AC. After the drive is done copying files I separate it from teh power supply and break out my voltmeter. It measures a difference of ~50VAC from the DC ground of the supply to earth ground. The current is difficult to measure as it is a sudden discharge. A little pissed off I cracked open the power supply (NO USER SERVICABLE PARTS INSIDE) just to take a look. Glorious. As I suspected earth ground is not tied to DC/case ground.  Not the worst shock by far. But at least the other times I got jolted it wasn't the result of a badly designed product. -Foxxz -Foxxz |
Beerskie anyone?
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I got hit just two days ago, pluged in a 220v TIG welder and made the circut complete somehow. Had the inside of my right knee up against the welder and my left elbow touching the compressor. Shot right through me and seemed to make an extra trip around my nuts, they ached for hours. Held it for about 3 seconds because I couldn't do ANYTHING, finally fell down and that did it. I do NOT want to do that again. |
(just kidding)
Don't ever let me touch it, or touch me with it.   There are a couple seconds after I get nailed where, umm, shit happens.
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