11-29-2007, 05:51 AM
What kind of voltages are you dealing with here? This is potentially dangerous and you may need to consult a professional, but let me try and help.
The ground wire should provide the path of least resistance to earth ground. Paint is an insulator so you don't want to connect a grounding wire to a painted surface.
Zero ohms means no resistance, and on many digital multimeters "OL" or overload also means zero resistance.
If the shock you are getting is from static electricity that would mean you have a difference of potential between your body and the metal rack.
I would make sure that the power supply is grounded properly first, then the metal frame of your rack is also connected to ground. There should be zero (or very little) resistance between the metal case and your grounding wires.
The ground wire should provide the path of least resistance to earth ground. Paint is an insulator so you don't want to connect a grounding wire to a painted surface.
Zero ohms means no resistance, and on many digital multimeters "OL" or overload also means zero resistance.
If the shock you are getting is from static electricity that would mean you have a difference of potential between your body and the metal rack.
I would make sure that the power supply is grounded properly first, then the metal frame of your rack is also connected to ground. There should be zero (or very little) resistance between the metal case and your grounding wires.