PRACTICAL OPERATION OF DYNAMOS. 



191 



Fig. 1 19 as a millivoltmeter connected to a shunt and also ar- 

 ranged to be connected through a high resistance to the bus bars 

 so that it may be used as a voltmeter if desired. The dotted 

 lines in the diagram of connections in Fig. 1 1 9 show a voltmeter 

 (not on the panel) which may be connected either to the main 

 bus bars or to the " potential buses." 



One of the feeder panels in Fig. 1 1 7, having eight two-pole 

 switches, controls eight pairs of feeders and the other controls 



Fig. 117. 



six pairs of feeders. The feeders on both of these panels are pro- 

 tected not by circuit breakers but by fuses as shown in Fig. 1 20, 

 which figure gives a front, back, and side elevation and a diagram 

 of connections of that panel in Fig. 1 1 7 which controls eight pairs 



