We are installing some recessed lighting in our kitchen ceiling. The ceiling is completely open. The ceiling joists are 2x4s (full 4" tall) and the space above is dead space/attic.

My understanding of electrical code is that when wiring perpendicular to joists the wire must pass through holes in the joists, not above the joists. It's also my understanding that wires/holes must be 1.25" from the edge of studs or 2" from the edge of joists.

This doesn't seem possible in this case, unless I am missing some exception for attic spaces? Or should I just go with boring a hole at the center of the joist and using nail plates? Thanks for your help.