ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 10
Recent Posts
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Dimmable LED 2x4 lay in fixtures
by gfretwell. 04/22/17 01:14 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
How do you find a good employee?
by HotLine1. 04/22/17 10:44 AM
Electrode boilers question
by SteveFehr. 04/21/17 08:32 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,487 Are you busy
169,144 Re: Forum
162,495 Need opinion
Who's Online Now
0 registered members (), 55 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
Page 1 of 2 1 2
#214 - 12/27/00 09:19 PM Static Question  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
Can Anyone easily explain how and why static builds up on someone in a car or truck?

I have wondered why I get a shock sometimes getting out of the vehicle. I never really thought much about it. Today after getting gas (self serve) I got back into the van and started to drive away, looked in the mirror and saw that I had left cap off and door open (mind was elsewhere I guess). I stopped and got out to put the cap on and got a nice shock when putting the cap on (touched metal somewhere). Having a spark in front of the entrance to my gastank really caught my attention.

Anyone know of a way to keep this from happening?


Work Gear for Electricians and the Trades

#215 - 12/28/00 01:48 AM Re: Static Question  
Eclavea  Offline
Junior Member
Joined: Dec 2000
Posts: 5
OKC
I've always wondered how to prevent it to. What keeps the static down on me is those fabric softener/ static stopping sheets for the dryer.


Eclavea

#216 - 12/28/00 08:59 AM Re: Static Question  
gto6t7  Offline
Member
Joined: Dec 2000
Posts: 27
Machias, ME
Had an electrician working for me years ago that screwed some jack chain to the rear bumper so it draged on the ground and it stoped him from getting a shock everytime he got out of the van. After time the part of the chain that touched the ground would wear down and he would start getting shocked again so he just added a few fresh links to the end.

Dave T.


#217 - 12/28/00 09:09 AM Re: Static Question  
gto6t7  Offline
Member
Joined: Dec 2000
Posts: 27
Machias, ME
Had an electrician working for me years ago that screwed some jack chain to the rear bumper so it draged on the ground and it stoped him from getting a shock everytime he got out of the van. After time the part of the chain that touched the ground would wear down and he would start getting shocked again so he just added a few fresh links to the end.

Dave T.


#218 - 12/28/00 09:14 AM Re: Static Question  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
I guess that the thing that surprises me the most is that I only drove 5 feet. The charge built up in a matter of seconds. I will surely be more careful next time I get gas!

I'm wondering, is this part of the reason that some states do not allow self serve pumps at Gas stations?


#219 - 12/28/00 09:30 AM Re: Static Question  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
In my opinion most of the static charge builds up between your outer clothing and the seat covers as you slide in or out. If you hold on some bare metal(painted metal is an insulator) on the vehicle as you are getting in or out the charge will be dicharged and no spark will be produced.
In my opinion most of the static charge builds up between your outer clothing and the seat covers as you slide in or out. If you hold on some bare metal(painted metal is an insulator) on the vehicle as you are getting in or out the charge will be discharged and no spark will be produced.
The heat energy is not normally high enough to ignite gasoline vapors, but it is possible. If it did all you would get is a small flash as the vapors around the fill tube burned off. The flame will NOT travel into the tank(the mixture is well above UEL(upper explosive or flammable limit) and it will NOT explode.
Don(resqcapt19)


Don(resqcapt19)

#220 - 12/28/00 09:48 AM Re: Static Question  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
Here are a couple of sites to look at:

This one is a statement from the American Petroleum Institute about static and filling gas tanks. http://www.api.org/apireports/static.htm

This one is some general static electricity information with a section on cars. http://www.eskimo.com/~billb/emotor/zapped.html
Don(resqcapt19)


Don(resqcapt19)

#221 - 12/28/00 09:51 AM Re: Static Question  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
Don,

Thanks for the comments. It makes me feel better!! [Linked Image] I do usually touch metal when getting out, though not purposely. I will try to do it all the time now though just to be on the safe side.


#222 - 12/28/00 05:13 PM Re: Static Question  
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,707
Anaheim, CA. USA
Don hit the nail on the head!
When you slide across the car seat, you scrape up free electrons from the seat. If you do not ground your self while sliding, the charges build up in your body rapidly, which accumulate to create a large potential [voltage]. The car body is considered ground in this instance, however an actual ground connection is rarely required to discharge static charges [just scrape your feet on a carpet when the weather is prone to static, then touch another person. This should demonstrate this point!!].


Scott.


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

#223 - 12/29/00 12:11 AM Re: Static Question  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
Don,

Those were good Links! Upon reading some of the information it seems that static electricity can also be built up from simply sitting on a plastic seat (mine are fabric though) and it might have been lucky that the spark happened after some of the fumes had cleared. I will add some of this info to one of the safety areas soon.

Bill


Page 1 of 2 1 2

Member Spotlight
Admin
Admin
NY, USA
Posts: 3,439
Joined: October 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.015s Queries: 15 (0.003s) Memory: 0.8175 MB (Peak: 0.9919 MB) Zlib enabled. Server Time: 2017-04-23 15:46:08 UTC