I recently opened up an old electrical box with a weak ground. To fix the ground problem I wanted to connect a ground wire to a green grounding screw into the box.
However, the old box doesn't have any holes for 8-32 sized screws, but only for the larger holes (for mounting?).
A) Is there any reason why I cannot screw the grounding wire into one of the larger holes in the box?
B) What size screws fit the larger holes?
C) Would any normal screw metal type work?