Dust collection, Looking for some advise.

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Forum topic by ncdon posted 12-07-2010 08:12 PM 738 views 0 times favorited 2 replies Add to Favorites Watch
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214 posts in 2298 days

12-07-2010 08:12 PM

It’s time to “hard pipe” my table saw. I want to run 4 in thin wall pvc piping in the overhead. It looks like 30 ft
will get me up, and over to the area where I’ll drop down to the saw. I’ve been told that static electricity is a
problem with pvc, and that I should run a wire inside and outside the piping to carry any charge to ground.
My shop is a metal building. The structure itself is grounded. I will be using metal straps to secure the pvc
to the steel rafters of the building. Would not those straps carry any charge to ground?
I’d really like some help on this. I’m not much of an electrician.

-- Don, North Carolina, Working full time at retired.

2 replies so far

View dbray45's profile


3147 posts in 2198 days

#1 posted 12-07-2010 08:28 PM

I put the wire on the inside and connected the wire to the saw and to the blower unit. Connect to the straps as well.

-- David in Damascus, MD

View TheDane's profile


4938 posts in 3085 days

#2 posted 12-07-2010 09:06 PM

I’m not an expert on dust collection, but I’ve a lot of experience with ESD (electro-static discharge … I used to be a licensed electrician and I work for a software manufacturer and computer systems integrator … we spec out and/or install server farms, control rooms, etc.).

I would advise running the wire outside the pipe (either PVC or metal). Make sure you have a solid connection on both ends … I have seen some DC setups where the copper wraps around the pipe one or two turns per foot.

Wire run inside the pipe will work, but may catch chips, which could in turn impede air flow.

While on this subject, some fear improper grounding may constitute a fire hazard. I think the chances of a fire are rather slim. I suppose it could happen, but I have always been more concerned about the ‘shock’ from ESD, as well as the damaging effects it can have on surface-mounted or solid state electronics (like you computer and a bunch of other electronic items you may have in the shop).


-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

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