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>> Looks pretty much identical to me...
>
> It has no ground connectors and is smaller.
Ah, OK. You can't really tell the scale from the image...
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"Invisible" <voi### [at] devnull> wrote in message
news:48f33a4b$1@news.povray.org...
>
> So it seems putting 250 V through your hands isn't necessarily an instant
> fatality like they tell you on TV.
>
Through your hands, no. Through othe parts of your body, maybe.
I've been zapped by mains current once (240V, SA standard). I was trying to
remove the network cable from a server (10-base-2, coax), and as I turned it
to unplug it, my wrist brushed against the power cable, which was missing
insulation right at that point.
Next thing I was sitting with my back to the wall of the server cupboard
(1/2 a metre from the server)
I'd been resting elbows on the floor of the cupboard, so the current only
flowed wrist to elbow, but I couldn't write or type properly for a short
while afterwards.
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Gail wrote:
> Through your hands, no. Through othe parts of your body, maybe.
You would have thought holding the two halves in either hand, there'd be
a rather high chance of the current crossing your chest cavity... hell
*I* wouldn't like to try it!
> I've been zapped by mains current once (240V, SA standard). I was trying
> to remove the network cable from a server (10-base-2, coax), and as I
> turned it to unplug it, my wrist brushed against the power cable, which
> was missing insulation right at that point.
> Next thing I was sitting with my back to the wall of the server cupboard
> (1/2 a metre from the server)
>
> I'd been resting elbows on the floor of the cupboard, so the current
> only flowed wrist to elbow, but I couldn't write or type properly for a
> short while afterwards.
I bet that hurt! o_O
Actually, come to think of it, there *was* that time I was trying to
figure out why mum's electric shower wasn't working properly. I took the
cover off and had a look at the circuit board. I couldn't see anything
wrong with it. Of course, all circuit boards run at a mere 5V, so it's
quite safe to touch even thAAAAAARGH!!!! >_<
I guess standing in a fiberglass bath tub saved me. It hurt quite a bit
though. (I mean, it stopped hurting as soon as I let go, but I nearly
headbutted the wall!)
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"Invisible" <voi### [at] devnull> wrote in message
news:48f3154d$1@news.povray.org...
> It's amazing what you can find out on teh interwebs...
>
> For example, that plug you use to plug normal equipment into the
> electricity grid. Apparently there's a name for it. It's called "BS 1363".
> (Memorable, eh?)
We use both of these:
http://en.wikipedia.org/wiki/Image:M_plug.jpg,
http://en.wikipedia.org/wiki/Image:C_plug.jpg
It's irritating, as the two require different sockets and so people tend to
have a number of convertors lying around to allow the 2-pins to be used. All
the wall sockets are for the 3-pin only.
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Invisible wrote:
>
> Not something you think about every day - until you realise that less
> civilised countries just use a plain metal stick so it's frighteningly
> easy to pull out of the wall, plug in backwards, electrocute yourself
> with by touching the pins while inserting/removing, insert random
> objects into the socket, etc.
>
Heh, that's not a jab at the U.S. style plugs, is it? Our wall sockets
are just the right size for a determined toddler armed with only a
screwdriver to, err, well ... That's why we invented any number of
different solutions to prevent determined toddlers armed with
screwdrivers from sticking the end of the screwdriver in the appropriate
slot and causing a simultaneous power and life failure. :)
So, can't a kid stick something metallic in a British design socket?
> I guess it's like you don't realise how stringent UK health and safety
> rules are until you see some pictures on the TV of workers in some
> random country using blowtorches and angle grinders without any safety
> equipment at all...
I remember on a cruise to Mexico, they were working on fixing the pier,
they had run out to their power tools, above the salty water, what
looked like a pair of wires, twisted together at some points to extend
it. OSHA would have had a field day with their utter lack of regard for
basic electrical safety.
--
~Mike
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Invisible <voi### [at] devnull> wrote:
> >> Looks pretty much identical to me...
> >
> > It has no ground connectors and is smaller.
> Ah, OK. You can't really tell the scale from the image...
(Of course "smaller" meant "smaller in volume". Naturally the round part
has the same radius.)
--
- Warp
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scott wrote:
>
> Saw a big 3-phase motor once, the supply cable was simply stripped back
> and tied around the contacts on the motor! No cover, nothing.
>
My favorite are the 3-phase plugs. I had one hell of a time trying to
unplug one, until someone walked up, twisted the plug and pulled it
right out.
Reminds me of the test bench we had set up once. 3-phase from the
wall-socket, neutral screwed to a big steel plate, and 3 phases into
breakers, all nice and well exposed. Some guy from a vendor was out
trying to diagnose some problems we were having with the bus and
electronics on the test rack actually jammed his screwdriver straight
into the contact of one of the phases. That had to hurt :/ Then after he
got jolted pulled out his multimeter to see why the ground plate was
"hot" I just told him he should be more careful when he's holding long
metal objects around hot electrical stuff.
Man, I miss working at the equipment division sometimes. :)
--
~Mike
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Invisible wrote:
> OTOH, take a look at those overhead power lines. It's not so much that
> the current involved might make your heart stop beating... it's more
> that your body is liable to be transformed into an actual human crisp. ;-)
Somewhere on Youtube there's a video of a backhoe making contact with a
(I think) 15kv overhead line. Needless to say, the backhoe was no more.
--
~Mike
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scott wrote:
> http://en.wikipedia.org/wiki/Europlug
We use those (or used to) for some devices but most have this:
http://en.wikipedia.org/wiki/Image:Australian_dual_switched_power_point.jpg
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Invisible wrote:
> That worked for about 20 minutes, and then the ends unhooked.
> Frustrated, my dad picked up the ends again... and then got up off the
> floor and UNPLUGED THE HEATER before repeating this action. ;-)
As a kid, about 5, for some reason still unknown to me today, I got it
in my head that I should unplug the clock that was on top of a dresser,
so I crawled underneath the furniture, grabbed the plug, slid my fingers
behind it to get more leverage, and >Thump< a nice 110V hit. From that
day forward, I've had a very healthy respect for electricity. But, no. I
wouldn't recommend anyone make contact with live wires. It's just asking
for a trip to the morgue.
--
~Mike
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