I will be installing my dust collection system soon. It will all be
6" PVC pipe. It will only get used about 1 weekend per month.
I would like to find out who has had the best luck grounding similar
It seems that some run a copper wire only inside the pipe, some run a
copper wire in and outside the pipe, and some have run aluminum foil
tape on the inside of the pipe.
I seriously doubt dust explosions. Having personally seen these type
tests done at the NFPA lab in the northeast it would be incredibly
difficult to have this happen in a typical home shop.
I desire the grounding to just keep from getting shocked.
What seems to work, and what hasn't worked well?
I am interested to hear only from first hand experience.
You are not likely to be very successful in grounding PVC pipe since
PVC is an insulator.
You could run tape inside the pipe but that won't do much good either
since the air is still a pretty good insulator.
And how do you think that adding a second plate to the capacitor is
going to change matters?
The only way you are going to affect the charge on the particles is if
the ground actually touches them. Thats not going to happen without a
serious interference in the air flow.
Here's what worked for me for the last 5+ years. I went
through the "should I, shouldn't I" routine too, and in the
end, I did it because it was silly not to (cost, maybe $20).
At each junction (elbow, wye, etc) I drilled a 1/8 hole
in the pipe. I drew the (non-insulated) 22 g wire through
each pipe and out each drilled hole. I drew each end taught
and affixed with a split-shot on the outside of the pipe so the
wire would not sag inside & cause clogs.
I joined the wires across each junction with a wire nut.
I grounded the entire system to a copper cold water
pipe that happened to be right next to my dust collector
in the basement. Then I attached it to the collector itself.
I'm not an electrician, but so far, so good. I am retired and
use the system 3-4 times each week (usually several hours
a week total "on" time).
I did read up on it a little, but just used what I thought was
some common sense.
What do you do with your dog and kids during the winter?
Do the same thing with your DC.
Master Woodbutcher and seasoned termite
Shamelessly whoring my website since 1999
My dust pipe from the lathe clogged up due to the shavings catching
on the internal ground wire. I removed the wire and have had not
static problems. Static from the pipe itself will not bother you
since the charge can not move. (For the same reason, 120V in
house wiring does not bother you. The insulation keeps the
charge from flowing through you.) If you do have static problems,
ground the pipe surfaces you will actually touch. In your case,
put the grounding on the outside of the pipe where you might touch
it. This assumes you do not live where you get yourself
a static charge by walking across the carpet in winter. In that
case, talk to your local friends and experts about what they
actually do. If static really causes you problems, investigate
the anti-static information used for manufacturing and repairing
Big John wrote:
Somewhere (bills site?) I read that a business was having the same problems
and wire didn't really do any good. What worked was a strip of the metal tape
along the inside of the pipe and a strip on the outside, joined together
(grounded) by running a sheet metal screw through both layers of tape every
10 feet or so.
Bill (http://billpentz.com/woodworking/cyclone/Ducting.cfm ) used 6"
PVC and used 2" wide metal tape. Installing the tape might not be an
issue with 6" PVC but I want to use 4" PVC. Anyone know about a paint
that adheres to PVC and conducts electricity?
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