I have a small portable generator (2200W / 120V). It is only used for emergencies (heat and lights in the winter and fridge and lights in the summertime) when the power goes out (which thankfully doesn't happen very often). I would like to wire a small manual transfer switch (up to four circuits) but my electrical panel is about 55 feet from an exterior wall where the generator will be running. What wire size should I go with? I have about 50 feet of wire to run inside the house and I am adding about 5 feet for the extension cord between the generator and the outlet in the wall.