Bonding non electrical devices

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reboldhack

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I read article 250.4 regarding bonding of electrically conductive materials likely to become energized. Does the Code mention anything with regards to grounding for purposes of dissipating static electricity from conductive (metal) devices that are part of the buillding?
 
Re: Bonding non electrical devices

What do you mean by "conductive devices"? Do you mean components of an electrical system that are intended to carry and control but not utilize electrical energy? These devices would all be bonded to the equipment grounding system and therefore, I do not believe "static" would be an issue.

Do you have a specific concern or are you just generalizing?
 
Re: Bonding non electrical devices

I have a laboratory with a metal framed (non electrical) 'pass through' device for non hazardous liquid transfer between two rooms. It came with a bonding strap (and no instructions); I checked NFPA 77. Maybe the strap is for use in Class 1 Div. 1 applications but even that doesn't seem to apply unless liquid transfer is taking place.
 
Re: Bonding non electrical devices

For the sole purpose of neutralizing static charges, it can be grounded with any means, i.e. a local EGC, building steel, grounded water system piping, ground rod, etc...


Roger
 
Re: Bonding non electrical devices

I found out through trial and error the safe discharge of static electricity is a difficult problem to over come especially when liquids are beginning transferred. There is a lot of info on the web. Many grounding ideas some work most do not.
This is a bigger problem than most realize.

dcv
 
Re: Bonding non electrical devices

dcv, instead of saying you have searched websites to no avail, why not tell us what you have found to remedy the problem?

It's not to the best interest to "toy" with the forum.

Originally posted by dcv:
BRENTP I've read your post for sometime and I learn a lot from them ,but I have to ask how much longer are you going to toy with these guys with this post....... let 'em in on it
Click to expand...
This was from this thread

If you have substantial information pertaining to a thread, we would be interested in hearing or reading about it.

BTW, eliminating static charges can be difficult to remedy as you say, but Reboldhack didn't indicate it was a problem.

Roger

[ July 30, 2004, 09:03 PM: Message edited by: roger ]
 
Re: Bonding non electrical devices

I don't know if I like the idea of bonding non-electrical equipment that would otherwise not likely become energized.
 
Re: Bonding non electrical devices

This reminds me of the maintenance building that I spent most of my time in while I was in the Air Force. It had a 1" X 1/8" (approximately) copper bar that was stood off from the wall and was about 2 feet above the floor. I was in a Munitions Maintenance Squadron and worked on the nuclear weapons that were carried on the B52s. We would use the copper bars to ground the bomb trailers, racks, vehicles, etc. while we were working on them. At the time, I had no knowledge of building wiring so I didn't check out much else.
 
Re: Bonding non electrical devices

Originally posted by reboldhack:
I read article 250.4 regarding bonding of electrically conductive materials likely to become energized. Does the Code mention anything with regards to grounding for purposes of dissipating static electricity from conductive (metal) devices that are part of the buillding?
Click to expand...
There are other NFPA codes that would cover this.
 
Re: Bonding non electrical devices

dcv, instead of saying you have searched websites to no avail, why not tell us what you have found to remedy the problem?

It's not to the best interest to "toy" with the forum.
Click to expand...
Recently I had an experience with a static electric charge and a desel tank. The tank is about 100 gallons located about 10' off the ground on top of welded a metal frame with a hose and nossle at one end ,the problem was, every time someone tried to fuel their equipment a strong static charge would give 'em a shock ,I myself could hear this charge build up as the fuel was pumped.
After several different attempts to stop this,I ended up with a bare copper solid #10 wire attached to the tank wrapping the hose and attached to the nossle and another wire from the tank to a ground rod.
Has anyone else had a simular experience?
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Roger, I'm truely sorry for "toying" with the forum. I was only tring to share an experience I had ,I which I wrote about and copied here from a post in this forum "grounding and bonding".


So far in my experience with static electricity discharge,I have found it is a case by case bases, what I did in this instance has not worked else where.
 
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