Trip

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  1. Trip's post in Static shock? was marked as the answer   
    ==> The volume of dust
    To expand on PB, it's the volume, size of particles and their velocity. There are other factors such as volume of pipe, interior surface of pipe, etc, etc...
     
    A dual-drum is a great example...  You get twice the fun...
     
    Further, the second drum is typically a finer grit (giving finer particles), they create lots of particles per second, require high CFM/sfm to move them along the pipe, etc...
     
    I've never gotten a shock from a dual-drum, but as PB says, it'll wake you up...
     
    Come to think of it, don't believe I've gotten a shock from any of my stationary sanders... But did receive one from my planer (the DC ground wire running through the flex-connect came loose). It was impressive...
     
    FYI: When setting-up a new stationary tool, I use a VOM* to measure continuity between the tool and the DC system to verify that the DC's connection grounding wire is in-place. The tool is left unplugged to prevent a false continuity reading...
     
     
     
    *Volt Ohm Meter