occupancy sensing switch like MS-OPS2 puts a current on the ground wire. I don't like doing this, since ground wire is not meant to carry current.
The wiring diagram suggests connecting both the green wire and the metal face plate to the ground wire.
If neutral wire is available, can I connect the green wire to neutral, and the metal plate to the ground?
There is no version of this switch that requires neutral wire. There is a more expensive sensor switch that requires neutral wire.
MS-OPS2 install manual