Author Topic: How to properly ground dust collection system?  (Read 19000 times)

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Offline Sudirondack

  • Posts: 1
Re: How to properly ground dust collection system?
« Reply #30 on: February 09, 2021, 10:52 AM »
I’m setting up a new dust duct system in my shop and was planning on helping the static issue by wrapping the pvc pipe.  I’m planning on wrapping the 4” pvc pipe/duct with 14ga copper wire and at 3’ intervals inserted the wire thru the pipe wall about an 1/8” via a small hole, spliced the wire on the outside and spiral the wired around the pipe another 3’ to another hole and so on until grounding to the DC at one end and earth ground at the other.  Any thoughts on this approach?

Offline hdv

  • Posts: 335
Re: How to properly ground dust collection system?
« Reply #31 on: February 09, 2021, 11:47 AM »
You can do that, of course. But it will be of no use at all. You are trying to ground a very good insulator (PVC). Only the places where the wire touches the pipe will be grounded. All other parts of the surface will not be grounded at all.

Offline GarryMartin

  • Posts: 1885
Re: How to properly ground dust collection system?
« Reply #32 on: February 10, 2021, 04:41 AM »
Best article I ever found on this subject. Hope it helps.

http://www.woodcentral.com/articles/shop/articles_221.shtml

Offline jobsworth

  • Posts: 6723
  • Festool Baby.....
Re: How to properly ground dust collection system?
« Reply #33 on: February 10, 2021, 11:53 AM »
 @GarryMartin

good to see you posting again Garry, keep it up and dont be a stranger

Offline Paul_HKI

  • Posts: 73
Re: How to properly ground dust collection system?
« Reply #34 on: February 19, 2021, 06:42 PM »
School time.  Industrial electrician who regularly works in ATEX type environments dispels a few myths.  Worth watching.

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Offline kevinculle

  • Posts: 429
Re: How to properly ground dust collection system?
« Reply #35 on: February 20, 2021, 07:36 AM »
When I first installed my dust collection system I spiral wrapped all of the 4" PVC piping with 14ga stranded wire and grounded that to nearby copper water lines.  As was said it had little effect on the static charge in the piping as the copper wire only drains the charge from a relatively narrow strip along the wire since the PVC is an excellent insulator.  When I redid my shop layout I omitted the ground wire and there is no discernable difference in static charge when the system is running.

Offline SouthRider

  • Posts: 195
Re: How to properly ground dust collection system?
« Reply #36 on: February 20, 2021, 08:00 AM »
If you haven't already purchased/installed pvc consider snap together metal duct from Oneida (it's plenty sturdy enough, and ships easily). I sent them a drawing of my shop with desired equipment location and they designed a system for me. By the time you buy all the fittings pvc approaches steel in cost, and steel is easily grounded. A lot easier to adapt gates too.

Just a thought.
"We, the willing, led by the unknowing, are doing the impossible, for the ungrateful. We have done so much, for so long, with so little, that we are now qualified to do almost anything, with nothing at all."

Offline Mini Me

  • Posts: 58
Re: How to properly ground dust collection system?
« Reply #37 on: March 27, 2021, 07:14 AM »
I used to sell Clearvues and have had one installed using PVC ducting so I have a fair bit of experience in this area including all the myth and truth of it. If you were running a lot of fine dust through the ducting such as from a wide belt sander earthing might help in minimising static build up but having said that you can't earth an insulator and that is what PVC is. My system has never presented me with a problem but it is screwed directly to a metal framed building and has been there for about 10 years. Another mitigator of static build up is high humidity so if you live in an area of high humidity you should not have many problems at all. I can't recall any of my customers having the problem and without exception they all used PVC ducting as metal is simply not readily available here and the price is off the planet anyway. All in all for  the normal short time most hobbyists have a DE turned on the problem is most probably not worth worrying about in my experience.