u/Rocannon_

My house built in 1976. The ground wires are typically bonded to the metal boxes with clips. As I’ve replaced devices I’ve found the clips to be uniformly intact and tightly gripping the boxes.

The light switch I just replaced didn’t have a ground screw; the new one does. My understanding is the new switch‘s strap grounds it to the box, so I don’t really need to use the ground screw. However, I went ahead and screwed a ground wire pigtail to the back of the box and attached that to the switch’s ground screw.

So, i did a belts and suspenders, or did I do wrong?

I'm going to run NM-B (12/2) from a pantry to a closet to install a ceiling light. The existing construction is such that a 6 to 8-inch portion of the NM will be exposed in the pantry; the rest of the wiring will be enclosed in a wall and ceiling. I plan on using a standard 3/4-inch 90 degree elbow to protect the wiring where it's exposed. As I read the NEC, I have to put a bushing on each end.

Is that correct?