Both holes are threaded with the same 10-32 tap. How is one better for the purpose of connecting the EGC than the other????????/
Don
Don:
OK, I agree with your thoughts, but when was the last time you worked in an existing building trying to fish in and re-wire, or add additional circuits?
Say, the original electrician installed 4 inch square metal boxes, (1900 Boxes) and did not use all of the cable entries, removed the clamp(s) that were not used, and attached the EBJ or EGC to the screw you mention, often with no real head on it?
Now the new installer, who may be a DIY'er takes the cable into the opening where the cable is usually installed, and doesn't have a clamp like we might in our junk box?
I see that as the possible future hazard, that it could represent, because the installer will, and has installed the cable into the box without any clamps all.
I have seen this happen many times during my career, where the cables were not secured to a clamp because it was not in the box!
I am sure that some of the other "old work installers" here understand what I am talking about.
There were comments made by someone indicating that the IAEI One and Two Family includes the discussion that supports my issue and that clamps are not allowed.
It should be noted that both the present Author, and Previous Authors Simmons and Tedesco have been members of the CMP Panels involved.