"Christopher Tidy" wrote: That doesn't look edited to me, but it does look
Have you watched the David Letterman bit called, "Will it Float?" What we
have depicted here is a pair of flip-flops (footwear), supporting a
four-outlet electical thing. I don't think the flip-flops would float by
themselves, much less support the additional weight they are shown carrying.
Then we have an electric cord coming straight up for about 6", but it
doesn't tip. I say it was probably photographed on the deck and "cloned"
Crom yes. I found that out a couple years ago with a machine tool
mounted on rubber feet, on a rubber cable with no ground and a leak
from L3 to the case of the machine.
Laid down on the floor to check something on the bottom side, and
reached up and grabbed the machine to pull myself up. Hot day, nice
and sweaty (big back sweater).
The guy at the next machine saw me doing the Trout out of Water thingy
and knocked me loose. For which Im forever grateful.
It was at least 2 weeks before my testicles dropped back into
"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.
Think of it as having your older brother knock the shit out of you
for torturing the cat." Gunner
You are a thinking kind of guy. What is your thought about what would
happen if the cord *was* plugged in to a generator? (A generator with no
connection to ground.)
I thought that socket was for 200 volt cirtuits. If the socket did have
~200 volts between terminals, and they both contacted the water, is it
likely that the people would be in a high potetial area?
Does anyone know what happens if 220 VAC across terminals spaced 1 inch
apart is imersed in swimming pool water?
On straight line connecting the terminals the gradient is 220V/inc therefore
an ant 1/2" long midway between the terminals would feel like touching a110V
outlet with the hand while standing on the neutral wire.
To visualize the electrical field emanating from the socket, allow some
simplification and inaccuracies, still leaving the concept intact.
If you draw a circle 10 feet in diameter centered 5 feet from the outlet on
a line perpendicular to the 1" spacing, you can think as the 220V are evenly
spaced across the 31.4 feet of the circumference.
A man 6 feet tall floating tangent to such circle will be exposed to
6x220/31.4 or nearly 40V.
If the man was standing in the water on the same circle, at breast level,
arms down, looking toward the outlet,
the 2 feet or so across its thorax would feel about 13V.
For every roughly circular path you can draw around the outlet you can apply
the same concept, the voltage gradient will be 220/path-lenght.
In reality the lines of constant gradient are not circles even under ideal
conditions. I a real pool depend from the water composition and
distribution, the location and conductivity of the wall and the structures
immersed, swimmers included and their geometry.
For example if the wall were made of copper, then the voltage between any
two points would be minuscule.
OTOH, pool water isn't all that conductive. Water in general isn't very
conductive unless it has something like salt in it (consider all the
Christmas lighting set-ups out in the rain...). And, of course, to get a
jolt, one has to make themselves part of the circuit, i.e., connect
themselves between power and ground. Just being in an energized pool
wouldn't do it (consider the little bird perched on the power line...).
So, they'd probably get away with it...
First the assumption of a "floating" generator you expressed is not
guaranteed in the pictures, the source may be grounded on one side, in that
case things get complicated, the man can be touching the bottom (grounded)
and be close to the Hot side and get 220V.
Second what I wrote is based MY understanding basic physic principles,
before anybody risk THEIRS lives to verify this they should make their own
The common wisdom of not mixing water and electricity is fundamentally
Large, wet skin surfaces loaded with body weight are better contact (lower
resistance) than a dry fingertip gently brushing a small electrified screw
head, for example.
Ultimately, is not necessarily the voltage that is dangerous, is the current
across the body muscles, particularly the hearth.
Some of the voltage available from the generator is "lost" to push the
current across all the connections and what is left is actually across the
The official safe voltage is around 40V, I do not remember the details, the
lowest body resistance is 2000 ohms and a current of 10 mA through the
hearth is often lethal.
The fact that 40V across 2000 ohms produces 20mA and the voltage is still
considered safe may be rationalized by considering that not all the current
is going to flow through sensitive organs.