Given: A photo store, 277/480v three phase service, 1200 square feet has no show window, no sign, 277v flourescent lighting operating 9 hours per day. A single-phase panelboard feeds: 12 receptacles, 16A 120v printer, 30a 240v developer, 40a 240v developer. The minimum size single phase service panel should be at least _____.

Given: A photo store, 277/480v three phase service, 1200 square feet has no show window, no sign, 277v flourescent lighting operating 9 hours per day. A single-phase panelboard feeds: 12 receptacles, 16A 120v printer, 30a 240v developer, 40a 240v developer. The minimum size single phase service panel should be at least _____.