On Jan 28, 11:19 pm, " email@example.com"
Most residential circuits in the US are 220/110...110 being the center-
tap of your utilities transformer. Things in the home such as, heat
registers, clothes dryers, water heaters...tend to be 220 volts.
His valid point was that it's very difficult to wind up with
240V involving your body. You'd have to be in the path
of BOTH hots, which is fairly hard to do. Even if you're
working on a 240V outlet that is energized or say a
water heater, it's not likely you're going to grab one hot
with one hand, the other hot with the other hand. That
is what you'd have to do to get 240V. Typical would be
to grab one hot
while being grounded, in which case you'g be exposed
to 120V. Same thing if one hot shorts to metal in say
an ungrounded appliance. The case will be hot, but
only at 120V.
ANSI Standard C84.1 specifies that the nominal voltage at the source
should be 120 V and allow a range of 114 to 126 V (â5% to +5% Range A).
Service Range B has wider tolerances.
Nameplate voltages are lower to recognize voltage drop from service to
application point. IIRC, 115 is the corresponding value in current the
Historically 110, 115 and 117 volts have been used at different times
and places in North America.
I meant electricity beyond the tiny amounts in our bodies.
But you can't feel the pain from your own electricity. I wonder why
He made us feel pain from 110 volts. He probably knew we'd have
that some day, but it means until 150 years ago, we could feel pain
from it even t hough there wasn't any.
I'm not countring lightning.I don't think people avoid lightning for
the same reasons.
When I was a kid in the 3rd grade I was fixing our old b/w console
unplugged. I thought it would be safe. I discharged a capacitor and it
gave me quite a shock through the rivets in the kitchen knife I was
"fixing" the TV with. If you completed the circuit through both of your
arms it could easily cause cardiac arrest (where the one hand in back
pocket idea comes from). I learned my lesson. Always discharge capacitors!
this always cracks me up
I love the sound the amp makes zzzzzzzzzzzzzzzzt! LOL
That is pretty funny. Actually he probably felt nothing. He touched an
input, the body picks up a lot of things especially the 60hz AC around
him. That is what you hear. If you have a guitar cord plugged into an
amp, and grab the tip if the plug on the guitar end, it will make that
same sound. That amp volume was up pretty high too.
You can do the same with a home stereo using a cord plugged into an AUX,
TAPE, or PHONO input, touch the end of the cord (you wont get a shock).
(Phono inputs do this the best, they have an extra stage of
amplification..... of course most modern amps probably dont have a phono
my best friend bill is a retired electrical engineer.
as to the cap in the bathtub, he said since the easiest path would be
close to the 2 terminals, so the victims shock would be minimal. he
went on to say the entire tub would have a voltage gradient. similar
to a lightning strike but of course far less.
on the GFCI question my buddy uses one as a backup water tank overflow
You would get a minor shock but non lethal.......
On Fri, 27 Jan 2012 09:03:23 -0800 (PST), Bob_Villa
That's what I've been saying. Well, I said that if you throw a radio
or heater in the bathtub, the current will go through the drity soapy
water sononer than it will go thourhg the bathers body. What is
dangerous is catching the radio when your hand is out of the tub and
the only way to ground is through you.
I need volunteers to check this out. It pays 100 dollars per test, to
you or your heirs.
If you caught the radio before it hit the water, nothing would likely
happen, since it's all plastic. Unless it's one of those real old tube
sets with a metal cabinet and hot chassis.
Now this brings up another question. If the tub is plastic or
fiberglass, water supply is pex or pvc and drain pipes are pvc, the tub
is not grounded. I always wondered what would happen, since the person
inside is not really grounded. (I mean is an AC plugged in device hits
the water ????????
Careful, there might be somneone stupid enough on here to try :)
Some other newsgroups there are definately stupid enough people... lol
But the current flow doesn't have to be to ground. Think of a
flashlight. The bulb will light even with a flashlight on a
piece of non conducting material. The current flows from the negative
to the positive poles through the bulb filament. It's about the voltage
difference between two points.
Electricity doesn't flow just through the path of least resistance.
It flows through all available paths simultaneously. The amperage is
in inverse proportion to the resistance in the circuit(s). A person in
the tub could be in the circuit along with the water. The rule
is called Kirchoff's (sp?) Law if you're interested.
The EEs could explain it better probably.
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