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Video about the danger (or otherwise) of static in dust extraction systems

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Mike313:
Hi Folks,
I thought some might be interested in this video. Just flagging it - I'm not saying I agree or disagree - just that it might make interesting viewing:

https://www.youtube.com/watch?v=WJ8NMYlhaLQ

Mike.

Doug Barratt:
You don’t need to go to the trouble of copper wire & screws just stick aluminium tape along the length of the plastic ducting & connect that to earth, it will stop the build up of static.

I also have never heard of a fire caused by static in a small extraction system but I’ve had enough static shocks to now have my system earthed.

Twisted Trees:
I actually found galvanised was cheaper than PVC and solves the problem intrinsically. dust fires from static sparks? possibly in flour mills where there is a lot of fine dust, but I tend to avoid sanding enough to create an explosive cloud! also never heard of anyone having the problem, except when using the same sanding belt for wood and metal.

burywoodturners:
Try this https://en.wikipedia.org/wiki/Dust_explosion#Sources_of_ignition. There are may others on youtube
Ron

Twisted Trees:

--- Quote from: burywoodturners on December 12, 2019, 08:27:54 PM ---Try this https://en.wikipedia.org/wiki/Dust_explosion#Sources_of_ignition. There are may others on youtube
Ron

--- End quote ---

All the examples cited do not include sawdust, so yes it is a potential risk but not seen specific sawdust examples yet...

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