Larger copper pipes for dust collection?

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If I ground my PVC dust collection ducts to my water pipes, will I need to sweat bigger copper tubing since my dust collector is 240V?
It's a 3HP motor, but not that efficient so I'll run it on a 60A breaker. I'm planning to get about 9,300 CFM, but will use 18-inch duct to make sure the pressure drop isn't too bad.
I don't want SWMBO to get shocked while she's brushing her teeth.
Hope this helps, John
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snipped-for-privacy@bellsouth.net wrote:

Sounds good -- you might want to try a 60CFS motor on a 100Amp breaker with an old 3Phase motor wired in series with an auger bit. And twirl.
Good one.
-- Will R. Jewel Boxes and Wood Art http://woodwork.pmccl.com The power of accurate observation is commonly called cynicism by those who have not got it. George Bernard Shaw
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9300CFM?? That would suck a sinker right off the end of my Popiel!!
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wrote:

Sinker!??? It would suck you right off the other end of your Popiel and be looking around for more
--
Regards,
Mike
Flower Mound, Texas
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That would change the air in a garage every 20 seconds...who needs ducting? It will BE a duct!
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Here is a good read, very informative, take a look at
http://mywebpages.comcast.net/rodec/woodworking/articles/DC_myths.html
Read it through (it's short)
I've got to ask why you need to run a 3hp motor on a 60A ckt, is this what you have? Sound like over kill (way over), if you use a 60A breaker (or more like 50 is what I've seen), does the wiring support this?
9,300 CFM? Careful you don't suck up you're bench top tools. Don't know the size impeller you're using but specs on my delta with 3hp (that's running on a 30A ckt) is about 3000cfm. I live at 7,000 ft, so don't know what the real value is. Vendors don't do a good job of telling us what cfm value you will likely see.

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wrote:

Tools? I hope he dosen't have any small dogs or cats.
Damn, that would suck...
Barry
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snipped-for-privacy@bellsouth.net wrote:

Is the copper used in the plumbing domestic or imported?

A good idea! This stuff should work:
http://www.big-o.com/hdpep/boss1000.htm

Just don't let her use a WaterPik unless it's isolated.
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Jack Novak
Buffalo, NY - USA
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On Sat, 19 Mar 2005 18:27:50 -0500, "no(SPAM)vasys"

You're not giving away the WaterPic!!!!
Oops. Sorry. I thought I was on alt.tv.seinfeld
--
LRod

Master Woodbutcher and seasoned termite
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On Sat, 19 Mar 2005 18:27:50 -0500, "no(SPAM)vasys"

Oh yeah! That 900 mm (~36") should be just about what you need. I didn't see any T's or Y's on that web site though. That could be somewhat problematic. Let's see, 9600 CFM, 36" pipe, set that in front of the Unisaw, you don't even have to worry about offcuts riding by the blade, they'll be sucked right into the collector. 'course if you are cutting small pieces, you might have some problem with them being pulled in as well. That would suck.

+--------------------------------------------------------------------------------+ The absence of accidents does not mean the presence of safety Army General Richard Cody +--------------------------------------------------------------------------------+
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but it could do away with worries about kick back.. just have a lumber bin in the 2,000 gallon cyclone separator..
mac
Please remove splinters before emailing
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> If I ground my PVC dust collection ducts to my water pipes, will I

Gee whiz, it only makes sense, doesn't it?! Seems like the greater the possible static grounding, the greater need for a good ground, hmm? Lessee, 240v, 3 horsies, 60amps, I'd say about the surface area of a good beating! Back to you, John! Tom(Who doesn't mind when she gets shocked)
--
tomeshew


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John,
Put down the beer. Step away from the beer. ....
:-)
+--------------------------------------------------------------------------------+ The absence of accidents does not mean the presence of safety Army General Richard Cody +--------------------------------------------------------------------------------+
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Just use a little Sting-eze, they're barbless hooks.
John
wrote:

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safety
Cody
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wrote:

Naw, don't need it; I got it. Did see you managed to hook one.

+--------------------------------------------------------------------------------+ The absence of accidents does not mean the presence of safety Army General Richard Cody +--------------------------------------------------------------------------------+
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Well let's see, 9300 cfm through PVC will generate a static charge of approximately 350KV, and SWMBO will probably *feel* that. So copper tubing, any size, is out of the question. You need to replace the copper with gold-palladium tubing for superior conductivity, and as a bonus, the tubing looks great as it has a certain *chatoyance* to it. Sure it costs a little more, but you don't want SWMBO shutting down your shop, do you?
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So, the offcuts can be used as push sticks too...
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...and wind chimes!
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At this kind of power rating skip ground it to the pipes, wire the ducting back to the DC and it will power itself.....and most of the tools in the shop. The other advantage is that you won't have any dust within say 100 yds of the shop ( or bugs, or birds, small aircraft ......)
John C

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I was at ahouse where they had temporary power rigged up by some amatuer. They appear to have crossed the neutral and the hot leg. Maybe something else but when you would drink from the copper spigot your tarter would get knocked off your teeth. A low voltage cleaning session.

Jim B.
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