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Re: NST's ARE ALL DEADLY !!!!!!!!
After a lot of head scratching we found the cause of the shocks.
1. Reinhard was right, the zaps from carrying the Secondary are static,
though they are worse after a run. But if a "Volunteer" carried the sec
around the lab, he got 1 zap about every 23 steps.
No Geeks were harmed in testing :)
2. The HARD bites I got while changeing the NST setup were under the
following conditions.
The control panel was completely shut down and the key was on a necklace
around my neck. The Emergency Stop button was down, the Fire button was up
(both open).
I was standing on wet concrete pavement outdoors in a city park.
Problem: We only switched the hot side, as is the norm. We do not switch the
Neutral side for safety reasons.
In this event the suspected cause of my bite was the Neutral in the park
floating to about 60VAC and grounding itself out...though me!
The panel is being redesigned, and we now unplug the panel from the source,
and the NST from the panel before makeing adjustments.
Safety through fear, pain, and respect. :)
Chris B.
>Original Poster: "Stan" <sdarling-at-columbus.rr-dot-com>
>
>The secondary shock is almost certainly some form of static discharge.
>I have gotten a shock from touching my secondary many times, but it's
>more like the winter touch the doorknob static shock than an AC mains or
>NST shock. These static shocks can be unnerving, especially when you
>are new to coiling. But, after a while, you get used to them and don't
>even notice them any more.
>
>Believe me, when you get shocked by either 120 mains or NST output you
>know it! I gave myself a pretty decent shock off a 12/30 and the
>muscles in the arm the current went through kept cramping for a day or
>two afterwards.
>
>I'm not trying to play down your shocks, Chris, but I just have to
>believe (based on my own painful experience), that you were getting some
>sort of low current static shocks....
>
>Comments?
>
>-Stan
>
>Tesla List wrote:
> >
> > Original Poster: "Christopher Boden" <chrisboden-at-hotmail-dot-com>
> >
> > I got bit 3 times last week. twise from a shutdown and unplugged NST
>bank
> > when I grabbed the Primary side (110VAC) connection several seconds
>after
> > shutrdown.
> >
> > Also, while walking to the car holding the secondary coil, I got bit 5
> > times. Even AFTER we connected the top and bottom leads together and
> > grounded it out for a few seconds. Both of these have us stumped, though
>we
> > think the Ground in the park may be floating a bit.
> >
> > Chris "Sparky" Boden
> > The Geek Group
> > www.geekgroup-dot-org
> >
>
>
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