Existing Junction box With Service conductors (before any disconnects)(695.3 A (1). (ahead of but ot within same cabinet.) This is located in remote Pumphouse one room.
All the rest of Loads just about required to keep pumping station running Including Fire pump. Remember Water System not single building. Fire pump for Lack of Pressure.
If from utility Company transformer where do you get seperate Transformer??? Seperate Service yes Transformer???