I am finishing my basement. Walls and ceiling will be covered entirely. I need to install junction boxes behind the ceiling (up in the joists) or inside of the wall itself. From what I understand, the main consideration for this is that the junction boxes need to be accessible after the area is finished. For this I plan on using a wall panel to open/close access to this area.
What I have not been able to find information on, however, is how many you can put in proximity to each other. I have provided a picture here of a tentative install (they are nailed in place, but easily removable) of six junction boxes in an area between two wall studs. I will not be insulating this stud bay. I will fireblock the above area and ensure to my best ability that it is air tight with expanding foam and fireblock.
Is there any problem with this installation and does it satisfy NEC? (the yellow Romex here is NOT live by the way)