It will work fine and you will not have any problems on any 220 volt receptacle.
What most of you don't realize is that the neutral and ground and tied together when it hits the electrical panel. I have been using a 50 amp receptacle with only one ground & neutral since 2003 and have never had any shocks or issues within rv and no irregular stray voltages that were mentioned. It works for me for my purposes and would never recommend others do the same. I have been a Electrician for over 40 years and know what I am doing. I did drive a ground rod at the 50 amp receptacle box.
