Mike, I was highlighting one of the quirks of the wording in our code.
Green, or green/yellow, is reserved for the 'equipment grounding condustor' alone. That's the 'earth' wire from the receptacle to the panel. This is also sometimes referred to as the 'bonding' conductor.
The wire from the panel to the ground rod to the panel has a completely different name: the 'grounding electrode conductor,' or GEC. No color is specified; indeed, it need not be insulated at all.
The same issue arises with the 'water bond,' or wire from the panel to where the water line enters the house.
So, we look to other parts of the code which reserve other colors for specific uses. The only reserved colors are green, green/yellow, gray, white, and in one special circumstance, orange.
In common practice, the wire is solid and bare, while the similar 'water bond' wire is stranded and has black insulation.
