took OUT all the grounding wire I installed in my dust Collection hose

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Forum topic by steve6678 posted 11-05-2012 01:35 AM 1210 views 0 times favorited 8 replies Add to Favorites Watch
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438 posts in 2261 days

11-05-2012 01:35 AM

When I started lay-out of my shop I decided to start with a 6.5hp Shop-Vac and a Vortex add-on.
They work very well, way better than I ever expected.
I ran 2 1/2” clear hose with elbows, T’s, Y’s and blast gates for all machines.
My shop is small so it still has good suction even 20 ft. away.
I also have a inlet for a hose, w/blast gate, that I use for my orbital sander and connect to the Planer, Slot Mortiser, and also “clean” clean-up from the floor.
I try to use my other Vac for shop cleaning, I like to keep the “system” clean from dirt and floor type objects.
So…I was having a MAJOR issue with shavings and debris getting hung in the copper wire, ALL the time, crazy frustrating.
I took it all out and caulked the holes.
Now, my blast Gates close all the way, I don’t get clogs; the jointer is another issue, I believe a jointer NEEDS a 4” suction, just doesn’t suffice on a 2 1/2” system. I keep the door with the hose and blast gate located at the jointer easy to open, and sometimes just let it flow out on the floor, it’s not dusty, just shavings, and easier to vac later.
The planer is no problem with the 2 1/2” hose, it sucks it ALL up always.
I have had good luck with this economy system, it was cheaper than a full DC, and it works, thanks to Vortex from Rockler, and a CleanStream filter. THE BEST filter, and you won’t regret the $29.
So, I NEVER had a static problem, and I still don’t, nothing…
I used to get a slight buzz, elect. feel running a sander at a friends shop, he had the metal ducts for DC, no grounding.
I still have all the clamps at the blast gates wired to the machines, but NO wire running through my hose.

-- Steve - Dust sucks!

8 replies so far

View Dusty56's profile


11822 posts in 3889 days

#1 posted 11-05-2012 01:59 AM

20+ years gone by considering grounding my DC systems….still thinking about it… doubt that static electricity exists , but I’ve been shocked more getting out of my car than I ever have in the shop environment…never even seen a spark , just a little dust adhering to the DC piping. : )

-- I'm absolutely positive that I couldn't be more uncertain!

View steve6678's profile


438 posts in 2261 days

#2 posted 11-05-2012 02:08 AM

I thought I would try to do everything “correct”, the kit was only $11, so…but I feel it didn’t warrant a grounding wire throughout the system, besides, in 2 1/2” hose it clogs up too easy with the wire.
I see NO evidence of static elect. or anything I am afraid of…I know it works 100% better and efficient.
I still have a copper wire running from the MAIN water pipe in the house to the DC, and wires from clamps to machines metal contacts, good enough.

-- Steve - Dust sucks!

View Mike Gager's profile

Mike Gager

665 posts in 3469 days

#3 posted 11-05-2012 02:22 AM

fwiw you can run the copper wire on the OUTSIDE of the piping and it will do the same job without the clogging. however as many people will say, its most likely not needed at all

View crank49's profile


4032 posts in 3172 days

#4 posted 11-05-2012 03:07 AM

I have had a $25,000 bag house turn into a charred pile of junk from some of that “ain’t gonna happen” static sparking. It can, and does happen.

May not be very likely in a small home/hobby system, but still possible just the same.

I wouldn’t run the wire inside the duct, just along the outside and wrap around a screw head at each connector. The screw should be pointed and extend into the air stream a little; not enough to cause plugging though.

As for your jointer, run a 4”: duct from the jointer to a drop out chamber right next to the machine, then connect your 2 1/2” suction duct to that. Then the big shavings fall out of the air stream before they ever get into the small pipe.

View steve6678's profile


438 posts in 2261 days

#5 posted 11-05-2012 03:12 AM

Drop-out chamber…Nice!

-- Steve - Dust sucks!

View Tedstor's profile


1678 posts in 2834 days

#6 posted 11-05-2012 06:19 PM

Theres always a small chance that a small, hobby DC could start a static fire.
Theres also a small chance you might drown in your own toilet.
I don’t personally use a grounding system in my DC. I don’t wear a life jacket when I take a dump either. :)

View Swyftfeet's profile


170 posts in 2373 days

#7 posted 11-05-2012 06:35 PM

Also static electricity tends to flow on the surface of wire, stranded/braided is much better (more surface area). Its pretty serious overkill on a home system. Hobby level wood shop fire is more likely because you hit a nail or something and get fire due to hot metal sparks getting in your dust. Or dirty blades can cause enough friction I imagine, that and BLO rags.

Out of my rearend statistics: I’m betting your more likely to be hit by a meteor than a fire due to static in your system.

Also a slight buzz that you felt at your friends house is voltage(AC) leak from some power source. Static doesnt buzz like that. It is a build up of DC voltage that discharges instantly upon connection with ground. He could have a ground loop somewhere in his system and really really needs to get that checked out, they can kill you.

-- Brian

View OggieOglethorpe's profile


1276 posts in 2311 days

#8 posted 11-05-2012 08:37 PM

Years ago, I had ground wires in my PVC pipes. They caused clogs, so I pulled them out. I don’t think I ever noticed a difference.

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