Phisherman wrote:
On Sat, 13 Nov 2004 21:01:39 GMT, "Paul in MN"
wrote:


"nigel" wrote in message
ups.com...
Following on from the recent DC discussion ... what is the deal with
static charge buildup with all this dust flying around. I've heard
recommendations to add wire spirals around the tubing and connect
it to DC and machine grounds at each end.

I imagine this is only a problem with plastic tubes/conduits ...
metal would seem to be proof against the whole thing.
What do the experts have to say on this?


I can only imagine the static build up that will happen. I am in
the middle of putting up my collector system and the amount of
plastic (ABS) shavings that stick to the cut pipes is amazing. The
stuff is everywhere. Stuck to the saw, the walls, the piping, me; I
mean everywhere. I will definitely have to try to ground this
somehow. I was thinking of grounding to nearby 110V outlet cover
plate screws. Is this a viable way to go?

Paul


That will work if the screw is indeed grounded, but it is better to
use a pipe you know is buried into the ground.

I had a lot of electrical "book learnin'" in kollege but my practical
knowledge is very low. In this situation, grounding a DC to a good earth
ground, should there be a current-limiting resistor somewhere between the
water pipe and wire going through the DC system? If so, what size?

Thanks.

-- Mark