Is as access floor required to be grounded? In an office building, carpeted tiles. Power under floor in raceway. Non-stringered flooring spec'd (tiles screwed down at each corner) and ground straps at corner.
250.4 (A)(3) and (4) required that normally non-current carrying conductive material enclosing electrical conductors....be connected … ground-fault current path. Or likely to become energized also be grounded (paraphrased).
Is the intent to required access floor be grounded?