We get asked this question all the time >>>
Neutral grounding bonding plug is not legal for this application. No exceptions …here is the reason:
The NEC clearly states that all neutrals shall be bonded at the first means of disconnect (your main panel). When you “bond” a neutral anywhere but there it is a violation >> why? because you are allowing the unbalance of a load to be bonded to earth somewhere else.
How is that bad >>> me, you anyone disconnects the ground and gets a shock because the neutral was using the ground as a return path. A ground NEVER has any voltage on it UNLESS there has been a fault somewhere.
Clearly… A neutral is not a ground ever, at the panel only… the neutral is bonded. Neutrals return the unbalance of a load. The ground is there for fault current only.