Reply by Mainiac Matt

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Posted on Dust Collector System - Grounded??

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Mainiac Matt

8034 posts in 2324 days

#1 posted 10-03-2012 03:58 PM

If it were really necessary to ground a pvc pipe or flex hose DC system, don’t you think there would be at least one report out there of a fire that was started in one of the thousands of systems out there that aren’t grounded?

IMHO, for small hobby shop use, with DCs 3 HP and under you can better spend your money in a lot of other areas of your shop and get a lot more improved safety bang for your buck, than you will by grounding plastic pipe.

If your a commercial shop, generatign a lot of CFM and a lot of dust, then you should go all metal.

In the link above, the cause of the fire is attributed to an accumulation of very flamable waste… and any commercial facility in a heavily regulated country, almost certainly has an all steel pipe DC system.

We’ve had multiple fires in our DC piping at work…. and they have always been attributed to insufficient air velocity leaving deposited wood dust in the horizontal pipe runs (16” trunk line half full) and the ignition source has been sparks from cutting lumber with nails in it (which we routinely do).

We finally got a spark detection and fire supression system installed…. $50K for a system bought at a bankruptcy auction and refurbished and installed by the OEM.

Read up an you’ll learn that trying to ground an system made out of a material that is an insulator is somewhat of an oxymoron.

-- It’s the knowledge in your head, skill in your hands and motivation to create in you heart that makes you a woodworker. - Mainiac Matt

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