Re: Shock Warning

Thank you Marris,
At last a sensible reply to something we all know if we care to admit
it.
I'm sure many here have had a shock of some type and greater than the
stated currents.
If so are all the posts posthumerious ???

John S.

>--- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...> wrote:
> Take an ohmmeter. Squeeze The terminals as hard as you can. Lick

your

> fingers to make the reading as low as possible. I don't think you
> will get under 2,000 Ohms.
>
> It takes about 100mA to get you to be in trouble, i.e. you can't

let

> go of the leads. Do Ohms Law to figure the voltage needed to get
> 100mA to go thru you when you have 2K of resistance. That works out
> to be 200 volts.
>
> 9VDC does indeed tickle when you touch your tongue to it but it is
> not hazardous, let alone lethal. It takes 100mA at least to get
> yourself in trouble, and then it must pass thru your heart. To do
> that it must go up one arm, thru your chest and down the other arm.
>
> All good techincians and engineers know when you are dealing with
> potentially leathal voltages to keep one arm behind your back. The
> other one you can stick into dangerous parts. If you are wrong,

your

> fingers will get burned but current won't pass thru your chest and
> arrest your heart.
>
> 80VDC is enough to make you sit and take notice if you touch it the
> wrong way. It will not harm you however. 24VDC you can't even feel
> even if you are standing in a bucket of salt water.
>
> You really don't have to freak out about harming yourself at these
> voltages. Been there, done that, still alive and none the worse for
> the wear.
>
> Mariss
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "stevenson_engineers" <machines@n...>
> wrote:
> > >--- In CAD_CAM_EDM_DRO@y..., Keith Green <ksgg@s...> wrote:
> > > Volts don't kill; amps do. Usually the worst is less than

1A

> > > (near to
> > > your body's current) where it interrupts your heart. Volts

would

> > >just be the
> > > "penetrating power" of the charge. If you've got bleeding hands
> and
> > >are
> > > standing barefoot in a puddle of salt water, it wouldn't take
> > >much...
> >
> > So if I touch the leads on my big welder that's rated at 35 volt
> 300
> > amp I'm dead?
> > Funny that stick welders are sold over the counter with NO

warning

> on
> > them about the danger of getting killed by the output leads.
> >
> > John S.
> > >
> > >
> > > keith
> > > ----- Original Message -----
> > > From: "mayfieldtm" <mayfiet@i...>
> > > To: <CAD_CAM_EDM_DRO@y...>
> > > Sent: Saturday, August 17, 2002 1:58 PM
> > > Subject: [CAD_CAM_EDM_DRO] Shock Warning
> > >
> > >
> > > > --- In CAD_CAM_EDM_DRO@y..., "mariss92705" <mariss92705@y...>
> > wrote:
> > > > >
> > > > > You have to work very hard to get shocked by voltages less
> than
> > > > > 80VDC. It may tickle a little bit but that's about it.
> > > > >
> > > >
> > > > True, but don't forget that human skin is an insulator.
> > > >
> > > > If you-all are like me, whenever I work around machines,

tools

> and
> > > > sharp things like chips and tool bits, my hands often have
> > numerous
> > > > cuts.
> > > >
> > > > Be very careful when poking around with electrics with a cut
> > finger.
> > > > Even 12 volts can be lethel under just the wrong conditions.
> > > > Or so I've heard, (could be just a tall tail)
> > > > If nothing else, it might make you do the Jig.
> > > >
> > > > Tom M. :~(
> > > >
> > > >
> > > >
> > > >
> > > > Addresses:
> > > > FAQ: http://www.ktmarketing.com/faq.html
> > > > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > > >
> > > > OFF Topic POSTS: General Machining
> > > > If you wish to post on unlimited OT subjects goto:
> > > aol://5863:126/rec.crafts.metalworking or go thru Google.com to
> > reach it if
> > > you have trouble.
> > > > http://www.metalworking.com/news_servers.html
> > > >
> > > > http://groups.yahoo.com/group/jobshophomeshop I consider

this

> > as a
> > > sister site to the CCED group, as many of the same members are
> > there, for OT
> > > subjects, that are not allowed on the CCED list.
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