316 



ELECTRICAL EQUIPMENT 



TABLE 



ACTUAL SPEEDS OF WATER- 



Voltage. Standard generator voltages for all frequencies 

 are 240, 480, 600, 2300, 4000, 6600, with the corresponding 

 motor voltages 220, 440, 550, 2200, 6000. There is no motor 

 voltage corresponding to 4000 volts, since this is only used 

 on three-phase, four-wire lighting distributing systems. In addi- 



