Niagara, Lockport, and Ontario Power Co. bus-bar system at the powerhouse. Here we can see the charming M-3250 "Shawinigan Type" in ugly brown supporting a bus-bar system with what appears to be some type of isolation switch setup. Notice the glass windowed, wall tubes on the right side. I'm guessing that each section of these bus systems is connected to a 3-phase transformer bank located below.