I need to bake 60 potatoes and I have two kitchen wall ovens. The larger oven has two racks and the smaller has one rack. I will split them by putting 40 in the bigger oven and 20 in the smaller one. What's the best way to bake them (temperature and for how long)?

Wash the potatoes and place them on a single level (for better air circulation) in the oven.  Bake at 400°F for about one hour or until the internal temperature of the potato is 200-210°F.