Just got off the phone with a mechanic from Cummins/Onan. He says it is normal to have an open ground in an outlet when on gen power. He also said it was up to how Alliance installs it, as most folks have said He said since the coach itself isn't grounded to earth, you would have an open ground. I brought up the bonded plug. He said they do that on the smaller portable gens, but again it was up to Alliance, and how they wire it. I am now going to call Alliance. I'm leaning towards the this is normal category. Otherwise, it's a trip to the dealer. Thank you all.