I'm trying to install a 50amp breaker for a NEMA 14-50R outlet. After taking off the cover and investigating how the existing wires are installed, I'm unsure of the best way to install the new breaker.
I already have an existing hole in the drywall towards the bottom right, so I believe I wire to come in from that end. In addition, it seems like the top is quite congested already and I feel like if I were to try to cut a hole up there, I'd nick a wire.
My question is if I come in from the bottom right, can I use the right neutral bar for the white and ground wire and then take the black and red to cross over (staying towards the bottom and left side of the breaker box) to cross over to the left side, where I would install the 50amp breaker?
Or, since I'm coming in from the bottom right, I should keep everything on the right side and go straight up to install the 50amp breaker? If I do this, how should I route the red/black wires?
Unrelated question... for the main power coming into the house, it seems like the black wire isn't 100% all the way into the clamp. If I flip the main power switch off, can I loosen the holder, push up the wire, re-tighten the holder? I assume the lines are still hot regardless if I flip that main breaker switch or not.