408.20 requires the equipment grounding bus, and 110.3(B) tells us that listed equipment shall be used as per any instructions in the listing. That means one wire per terminal unless two per terminal are permitted. No bundling of all equipment grounding conductors in a panelboard.
Creighton
Thank you Creighton!! I hope this settles this question that also asked in other areas on the net, and as stated the answer can be found in the reference that you quoted!
