I am in the middle of a kitchen remodel. I originally thought there were (2) 120v circuits into the kitchen, so I thought I'd only have to add a couple more, but that is not the case. The two circuits ended up being multi wire branch circuits that connected to the living room and garage. Therefore I need to add a circuit (each) for lighting, 2 circuits for counter space outlets, fridge, dishwasher/disposal and microwave.
Anyway, the panel is an outdoor surface mount on the back of the house. The house is slab on grade with an attic. I am planning to run the "home run" through the attic and protecting the wires close to the attic access. My current problem resides around dropping the wires from the attic to the breaker box.
I originally just thought about dropping a conduit from the attic to the box just like the one coming out of the top left of the box (see picture: this contains the wires for a 50 amp and 20 amp 220v circuits) to the right side of the box. Then just dropping the NM romex through that. But...as I have read about this, I think the requirements are a little more nuanced than this.
So here are my questions:
1.Can I run the conduit to the right top of the panel and have the conduit just terminate in the box on one and and in the attic on the other end? To do this I will have to cut a hole in the top of the panel with a hole saw. It is 25.5 inches from the top of the top of the conduit body to the top of the breaker box.
2.There is a pop out toward of the bottom right side of the panel. Could I use that pop out and run the conduit a little further to avoid cutting and potentially dropping the waste metal on the live nut inside the panel?
I would use raintight conduit connectors for either of these options.
If either of these are not a problem, can I simply continue the NM romex into the conduit from the attic into the box, or do I need to transition to NM-b or UF romex before entering the conduit?
If I have to transition to UF, can it be in one junction box for the 5 romex cables or do they need to be separate?
Although I am not running a combination of 12 awg and 14 awg (separate circuits for each size of course) depending on the circuit, is a 1-1/4" conduit sufficient for (5) 12/2 romex NM or UF (whichever is required?
Is there anything else I am missing or that I should consider?
Thank you in advance for any advice you can give me.