Quote from Joe T's post:
Howdy:
It just so happens that UL agrees with those of us here who have not accepted the clamp screw threaded hole for the termination of the "Equipment Grounding Conductor" or "Pigtail Equipment Bonding Jumper."
How many of you will come back and say: "You were right"?
Qualify this statement and I will be one of the first to say you are correct. Don has been very diligent to research the facts concerning this debate and disclose his findings whether they support his position or not. I think it is only fair to expect the same from Yooper or Joe. It has been determined that Raco, Appleton, Thepitt and Steel City have UL listed 1 gang device boxes on the market with tapped holes that have no markings identifying them for a specific purpose. I would really like to know the complete correct answer to this debate. Please don't throw a bomb. Offer UL listing info or NEC reference to support such statements as the one quoted above.