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#114499 - 04/04/03 11:36 PM Dust Collection Systems  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,439
NY, USA
This is a topic that was brought up awhile ago and I meant to post some pictures I had taken. This system is a 2hp 'Grizzly' brand Dust Collector (specs say 1550 CFM) that my Dad installed down in his basement woodshop following procedures outlined in a book that he bought. Model was similar to this: (from www.Grizzly.com )

[Linked Image]

Here are pages from the book describing 2 installation procedures:

[Linked Image]

[Linked Image]

more pictures to follow...
Bill


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#114500 - 04/04/03 11:40 PM Re: Dust Collection Systems  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
He decided to run the wires on the inside and outside to be extra sure:

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]


#114501 - 06/14/03 01:49 PM Re: Dust Collection Systems  
PaulCornwall  Offline
Member
Joined: Jun 2003
Posts: 112
England
no way..... theres no need for all that earthing,,the metal junctions are connected via plastic pipes,, how can they become live?????


#114502 - 06/14/03 02:29 PM Re: Dust Collection Systems  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
Paul,

Admitedly, this may be more than is really necessary, but it was done to discharge static electrical buildup, as recommended by a book (shown) on how to install Dust-collection systems.

Bill


#114503 - 06/14/03 02:59 PM Re: Dust Collection Systems  
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
Roger that Bill. If you read the NFPA code on static electricity (OK the number escapes me at the moment) you will find you ALWAYS must run a conductor alongside your plastic piping in many hazardous or static prone areas.

Folks that are shooting sawdust through plastic pipes with no ground are living pretty dangerously. The power in one good spark can set up a very dangerous explosion.

I had to get into this very heavy when we did the fuel farm at Dulles, it's pretty amazing how much electrical buildup you can get with fuel running through pipes. The fuel never really touches the pipe due to differing polarity of fuel and pipe.

Pretty interesting, but a bit thick for quick answer.


#114504 - 06/17/03 08:55 PM Re: Dust Collection Systems  
Inspector Grump  Offline
Member
Joined: Jan 2003
Posts: 18
Bloomfield,NJ,USA
Many years ago, I worked for Tiffany & Co. The polishing of silver and the static it produced, gave many polishers a good jolt and set many a dust collector on fire. The only way we could somewhat control static was to run #4 bare copper through the pipes, dust hoods and bond everything in the area. On dry and cold days we still would get static discharges. we had to attach a ground wire with a clip lead.


Larry

#114505 - 06/20/03 08:02 AM Re: Dust Collection Systems  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
I learned about this the hard way,(as with most things), while taking down a PVC vacuum transfer system for documents (the type that sends little bottles through it).
The sttic zonk knocked me clean off of an aluminum ladder, and I sprained my ankle. This gave me some time to figure out what went wrong.
In retrospect, 25 years or so later, I was very lucky to have been just a few feet off of the ground...S


#114506 - 06/20/03 04:56 PM Re: Dust Collection Systems  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
My 2-year-old's hair stands on end when he slides down his plastic slide...


#114507 - 06/20/03 07:37 PM Re: Dust Collection Systems  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
Bill,
Having had a static shock myself off of an Industrial D/Collection system, I know that those grounding wires will pay for themselves.
BTW Bill, good pictures!. [Linked Image]


[This message has been edited by Trumpy (edited 06-20-2003).]


Let's face it, these days if you're not young, you're old - Red Green grin

#114508 - 06/24/03 09:38 PM Re: Dust Collection Systems  
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
I seem to recall Fine Homebuilding running an article, which asserted that the codes (requiring such grounding) did not apply, nor was there an ignition hazard present, in dust collection systems of the size likely to be found in a home shop. Industrial size systems being another matter.
Anyone out there have any primary data available?



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