2 branches in one electrical box
I'm starting a kitchen remodel. I've run a new dedicated 20A, 12/2 branch for an over-range microwave. The outlet will be in the cabinet above the microwave. I also want to run some LED under-cabinet lights and was thinking of putting the transformer into the same cabinet.
I have access to the overhead lighting branch as well (15A, 14/2). I'd like for the under-cabinet lighting transformer outlet to be switched.
Should I (or can I) install a double-gang box and run the 14/2 wire to outlets on one side of the box and then the dedicated microwave circuit on the other side of the box?
Or should I just install a single gang box for the microwave and plug the transformer into the unused outlet and wire it as a switched split outlet. In a previous house, this is essentially how I wired my undercounter lights, except they were not controlled by a switch.
I don't want to pull any new branches for the undercounter lighting as this seems like overkill for a 60W (max) set of lights.
Thanks in advance!