I agree, too. Drain straps were fairly common in the 60s to stop static
popping in AM radios. I think carbon additives in tires mostly put a stop to
I've used antistatic sprays on the driver's seat before, and it helps for a
day or two. I even got tired of brushing my knuckle against the latch, so I
just live with the ZAP.
Carbon has been added to tires since about 1920. Carbon is what makes tires
black. Absent carbon, tires are WHITE.
Carbon (soot) was added to automotive tires to prevent decomposition due to
ultraviolet radiation. It had nothing at all to do with electricity.
Good plan - works every time. For me, the, uh, shock value is strictly SHOE
dependent. I have one pair that just jolts the crap out of me when I get out
of the car unless I hold onto the door jamb latch with my right hand's
fingers as I exit the car. (There is no shock when I wear real leather dress
shoes.) As long as I hold onto that latch when exiting, I receive no shocks
whatsoever under any circumstances with any clothing in any season. I live
in the desert southwest where it's really dry, and that dryness probably
exacerbates the issue. So if that method works here, it should work
I don't know why;leather soles insulate fairly well,and the static
discharge is to the auto chassis,not to ground.
Unless your leather soles are really damp(and electrically leaky).
I wouldn't depend on that pair when working on anything electric.
That is because you drain off the charge -as it is generated- by your butt
sliding across the seat. Now,with the insulating shoes,try to not touch the
chassis and instead brush your knuckles against the ground and see if you
still get a shock;I doubt you will.
I'm confused about the draining off the charge as I slide across the seat. I
thought I was building up a charge when sliding across the seat. (These are
2004 Accord EX cloth seats. I have had the same issues with previous cars:
'97 Civic and '91 Civic.) And yes, my point was that with the "insulating"
shoes, I don't need to touch the chassis in order to prevent a shock, as
there is none.
When you refer to "the ground," as in brushing my knuckles against the
ground (which is how I normally walk) ;-) do you mean the concrete the car
is sitting on? I suspect you do -- I'll try that today.
When you hold onto the door frame and slide.
When you aren't "grounded" is when your body builds up a significant
Insulating shoes would RETAIN the body's charge,conducting shoes would
drain it(if contacting a "ground");that's how an anti-static strap or shoe
works in electronics repair(I'm an electronics tech),it has a resistor and
connects to a earth ground to slowly drain off charges -as they are
generated- by your clothes.
They actually make shoes designed to drain static charges,you have to be on
a conductive mat or surface.they make static draining floor coatings,too.
I had to take a anti-static course every year as part of ISO9000 procedures
for my company,wore anti-static lab coats,wrist AND heel straps,and tested
every day to be sure they were working.I used to work on equipment
sensitive enough to measure the charge generated when I moved just an arm
or leg when ungrounded.
sit naked on the seat,and you won't build up a charge either.Skin itself is
not a good static charge generator.Don't do it in public,though!!
Then the police will charge you!
Since that sentence is incomplete, I don't know what you're saying.
Regardless, today I wore my "bad" shoes and got out of the car without
holding onto the door frame. I, uh, dragged my knuckles across the parking
garage floor, and when I touched my car there was no shock. Pretty good!
However, I tried the same in my home's garage, which has metal rods in the
concrete. When I dragged my knuckles across THAT floor, I got a shock.
On Thu, 01 Mar 2007 17:12:27 -0700, Howard Lester wrote:
Not sure if you are joking or not. I am going to approach it as if you
When he said "ground", he didn't mean the ground you walk on. He meant
electrical ground. IE the body of the car. Hold the door frame, slide
across the seat and exit the vehicle, maintaining contact with the metal
the entire time. You will not build a charge.
I wasn't joking, because that is what he intimated. For years I have done
exactly what you describe, and it is foolproof. Jim seemed to have suggested
a different method, and, having tried it yesterday, it apparently does work
(as long as there's no metal in the concrete!).
The belt in a Vandegraff generator rubs against a collector brush,inside
the globe. Didn't you look at the diagram? Or read the text?
Also the support tube insulates the two pulleys from each other,unlike a
engine block and metal brackets suporting the alternator.(and ground straps
on the alternator and engine.)
you don't get a charge buildup rubbing an insulator against a metal
object.It's strictly insulators/insulators.
BTW,I have actually held a VDG globe and had discharges from my toes right
through my combat boots,in USAF PMEL tech school.They didn't insulate as
well as the instructor thought they would.Didn't hurt,though.
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