NEC 210.70(C) requires a light and switch in attics and underfloor spaces where mechanical equipment is located.
1. Is the space above a tbar ceiling in a kitchen considered an attic?
2. If yes, then all fan coils, exhaust fans and air handlers located above a tbar ceiling will require a light and switch.
My interpretation is this is only applicable above a hard lid ceiling not a tbar which is designed to be removed to access equipment above it.