On 12/2/10 7:54 PM, James Therrault wrote:
On Dec 2, 2010, at 2:44 PM, Dan wrote:
At 8:44 PM -0800 12/1/2010, Jonas Lopez wrote:
a minor wise point here -
if you are ever in your car and a storm causes electric overhead
wires to fall on the car and you can see sparks outside -- DO NOT
MOVE, DO NOT GET OUT OF YOUR CAR - you are in no real danger
provided your not a part of the ELECTRIC CIRCUIT
Correct.
- the metal of your car is ELECTRIFIED but the tires will prevent it
from burning since they act as a nice insulator.
Incorrect. The tires are not made of pure rubber. They are made
from a blend of rubber, synthetics, metallics, etc. Then there are
those pesky steel belts. IOW, your tires are *great* conductors.
They are (luckily!) NOT insulators.
You don't get electrocuted, as long as you're inside the car, because
the current is passing thru the metal chassis, thru the tires, to
ground. Some of the current is going thru you, but it's a trivial
amount, as electricity prefers the better route - thru the tires to
ground.
It might be worth mentioning that the car acts as a Faraday (sp?) box
whereas most of the voltage/current remains on the outer perimeter.
The way out of this is NOT TO STEP OUT as that will complete the
electrical circuit and you will be toast.
Correct. If you were to step out of the car, while still in contact
with the chasis, then the current would use you as the better route
to ground. That would be bad.
BUT if you can jump out BEING SURE YOUR TOTALLY IN THE AIR then you
can exit the car with no problems.
But to take that flying leap... Current jumps at the rate of about
10,000 volts per inch. You better clear the car completely, *and*
all the wet pavement, by quite a bit... This is totally not
recommended. The best thing to do is just sit tight until the power
is turned off.
Yeeeeesh. Personally, I think I'll just stay indoors during a
thunder-and-lightning storm! :-O
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