Re: grounding lugs
You have to read the fine print that comes with the service panel. Most times it says, "You can install two or more "GROUNDING" conductors if they are the same size. That would be the bare ground wire. Not the neutral or the "GROUNDED" wire. I believe the 2002 NEC just help to clarify this issue. My state still goes under the 1999 NEC for now.