how about using a GFCI instead, and using a pushbutton to connect the ground and neutral together.
This would violate 250.24(A)(5)
250.24(A)(5) Load-Side Grounding Connections. A grounding connection shall not be made to any grounded circuit conductor on the load side of the service disconnecting means except as otherwise permitted in this article.
How about running a switch leg, or use a contactor etc.
There is no need to short a breaker or trip a GFCI.
