It's not a bad question ...
Caddy and B-Line both make brackets that are designed to clip onto the grid and support a box anywhere in the tile. The 'customary' wiring method is for the last part of the conduit run to transition to flex or MC; then you can still move things if needed.
Yet, these days we're not supposed to 'support' anything from the grid. Light fixtures need their own support wires. Would this bracket also need to have wire supports too? Or, is the support of the conduit enough?
What if the ceiling tile has been replaced by a wood panel, and the box attached to it?
I fear we have pretty much made the suspended ceiling obsolete.
