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Originally Posted by pickleboy
typically speaking there is no need for earth ground in powder coating. the circuit is only needed to run from the control box to the part on the groound side, and from the box to the gun. static charge takes care of the rest. if you are grounding the clamp and parts to earth ground this could possibly be causing you to not get full charge on the powder transfer to part. just a thought.
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Well I was grounding my gun to the top of the rack, and the bottom of the rack is grounded to the earth ground. How could I use a multimeter or something to test if I have good ground? I remember reading a method but I can't remember where it was...but I always make sure my hooks and rack are ground down enough to expose bare metal for good ground....not to mention at my clamp is ground too.