I have a question. My well is powered from a panel located in the garage. I would like to be able to power it from a generator when the power goes out. In lieu of a transfer switch could I install a 220 receptacle on the wall and a 15' or so cord. With a plug connected to the the well. When I have power the cord would be rolled up and plunged into the walk. When power is out I could unplug it from the wall and connect to the generator out side. Is this safe and okay?