I have a submersible water pump with a power cable that ends with a three-pronged plug with a protective neutral contact. Having a matching outlet is problematic - there are only unearthed outlets at where the pump will be installed.
Now I don't see why earthing should be needed in the first place. The pump will be fully submerged into a well with drinking water that will have contact with earth. So I assume that it will be automatically earthed at all times.
Is earthing required in such setup?