The big casino's in Vegas have large central plants where they receive the standard distribution voltage (12-13KV)from the utility. The huge casino's receive transmission level voltage (69KV) at their central plants where it is stepped down to 12KV. At any rate the power company meters at the 12KV or 69KV in the CP substation then the casino's distribute their own, load side of the meter, 12KV class system. Usually 12,470V, to many unit substations around the casino. Some are 12.47KV-480/277 some are 12.47KV-208/120V.
