megloff11x
Senior Member
NFPA 33 section 12.5 wants the handle of a powder coat gun to be no more than 1 Mega Ohm to ground.
In ESD work areas, they have everyone in wrists straps and such, and there is some significant resistance to ground to prevent ESD from cooking a circuit board or other sensitive electronics. They don't hard ground to keep you from shorting something to ground, i.e. you touch something live and it goes through your wrist strap, or through you and then through your heel strap. It's been a while, but I seem to recall 500k to a MegaOhm is what the wrists straps, mats, heel things, etc. provide. And I'm pretty sure I have the rationales correct but correct me if I'm wrong.
Back on subject, does NFPA want your powder coat gun handle to be ground-ground as with a metal enclosure, or are they doing this as with ESD to keep static off but not allowing a "short?"
I wish there was a little more elaboration. Can anyone clarify the matter?
Matt
In ESD work areas, they have everyone in wrists straps and such, and there is some significant resistance to ground to prevent ESD from cooking a circuit board or other sensitive electronics. They don't hard ground to keep you from shorting something to ground, i.e. you touch something live and it goes through your wrist strap, or through you and then through your heel strap. It's been a while, but I seem to recall 500k to a MegaOhm is what the wrists straps, mats, heel things, etc. provide. And I'm pretty sure I have the rationales correct but correct me if I'm wrong.
Back on subject, does NFPA want your powder coat gun handle to be ground-ground as with a metal enclosure, or are they doing this as with ESD to keep static off but not allowing a "short?"
I wish there was a little more elaboration. Can anyone clarify the matter?
Matt
