Grounding Tek retrofit into wooden canopy? NEW troubles...

[Myka]

I am in the process of wiring up my Tek retrofit today, and notice there now is a green grounding wire in the kit (didn't used to be in other kits I have used). The instructions say to attach the two green wires together (one from ballast, one from the power cord), and then to an Earth Ground. It is an Advance ballast with a metal casing.

From another thread:

Originally Posted by mike31154

If the metal case of the ballast is attached to a metal fixture, which is in turn grounded/bonded, then yes, the ballast is grounded/bonded. If you're mounting the ballast to a wooden or otherwise non-conductive material in a hood, as is the case for many retrofit applications, then you'll want to run a grounding/bonding wire from the ballast case to a proper ground. If there's a short inside the ballast to its case, the first time you touch it, could be unpleasant.

I am mounting the Tek into a wooden (and painted) canopy along with a couple halides. How do I ground the Tek ballast? What exactly is a proper ground? What should I screw that ground into?

On another note...the halides are grounded right? The halides are pendants that I am mounting into the canopy, not retrofit. Vertex electronic ballasts with PFO pendants, plug n play.

I don't get electricity...