When attaching wires to the side screw terminals of an outlet or switch (i.e. device) I had learned to form a J-hook and slip it under the screw head with the hook orientation following the clockwise direction of the screw when tightened.
However I've noticed a lot of wiring devices now seem to be designed to prevent the J-hook from being looped over the screw. On the left side of the screw there is sufficient space to slip the correct wire gauge down under the screw head, but on the right side where the end of the J-hook would land is much narrower, this prevents the hook from being slipped over the screw head. It looks like this is by design.
O.K. so back the screw out enough to gain enough space on both sides of the screw head in order to slip the hook under. But when trying to back the screw out at some point turning the screw becomes extremely difficult, almost like it hit a limit by design. The amount of force needed to back out the screw to open enough space to slip the hook under the screw head on both sides of the screw head seems excessive.
Why do these devices have different wire clearances on either side of the screw head and why does backing the screw out seem to hit a limit?
Do I have a misunderstanding of how to attach a wire the side terminals of a device?