Ohm_Boy said:As a general rule, the ground conductor should be the same size as the current-carrying conductors, and is typically determined by circuit current. For a 15 Amp circuit, one would use #14, w/ a #14 ground.
Definitely do not confuse the electrical ground with the bonding of the equipotential grid.
I understand the difference between grounding and bonding. But tell me this...on my setup my main pump, booster pump, heater have a copper wire connecting all them on the outside, THEN the copper wire is connected to the ground in my subpanel. So, it sounds like my equipment is GROUNDED, but not bonded? In each piece of equipment the internal ground and external screw connector are both connected to the metal frame/case.