"Art Greenberg" wrote in message
m...
Murphy's Law also states that, having put cleanouts in for later
addition of drops, no such drops would ever be needed.

Oh, they'll be needed alright. They just have to take too sharp of a bend to
get to the Y that was almost conveniently located.

SonomaProducts.com wrote:
But I can be
convinced with science so maybe I'll research that while I look around
for answers about using pvc or abs.

http://home.comcast.net/~rodec/woodworking/articles/DC_myths.html

Yep, Bill Pentz's site gives pretty much the same conclusions.
However, I did like the info Bill provvided about using aluminum tape
inside and outside the length of the ducting jump grounded acrocss
joints, etc. This at least avoids getting zapped. Also, the big danger
I guess is sucking up sparks from mechanical activity. The article you
referenced speaks about how not just explosion but even more likely
smoldering fires. Yikes. I think maybe Bill's suggestion to NOT
include a floor sweep opening where you can suck up screws to spark
off the impellors is probably a good idea.

I guess I'll be adding a few fire sprinklers to my garage shop.

On Apr 3, 2:05*pm, B A R R Y wrote:
SonomaProducts.com wrote:
*But I can be
convinced with science so maybe I'll research that while I look around
for answers about using pvc or abs.

http://home.comcast.net/~rodec/woodworking/articles/DC_myths.html

SonomaProducts.com wrote:
OK, so I figured when I formalize my dust collection for the home shop
I'll just go to Grizzly and order all the metal pipe, fittings and
blast gates I need. Going all metal I'll avoid the static problems.
Going with smooth pipe I avoid the friction loss of flex, yada, yada.
Well even with a very conservitive 2 branch run it is a bit costly.

So if I go plastic and religiously run the copper wire, etc. can I
just use standard ABS or something of the sort?

I've been using Schedule 40 PVC since 1976. No static problems, no
buildup to speak of, no explosions, no problems at all. No need to glue
anything or tape anything either. I have mine set up so the collector is
about 15 feet from my pre-collector drum, and everything except the
finest dust, and very little of that, gets to the collector. Most of
that gets filtered out before it hits the fan so about nothing ever hits
the fan, a good thing I think.

The only fire I ever worried about was when I used to smoke. I could
imagine a hot ember being collected somehow and smoldering until hours
later... never happened though. I may have had the table saw smoking a
few times too, that would make me nervous... Static electricity, I
doubt it... I have a hard enough time getting my chain saw started, and
it has vaporized gas and a spark plug, not wood chips and dust:-)

--
Jack
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