In C, two generators are employed and required and the addition of a bus section switch.
D, represents a number of generators supplying two independent circuits. The additional set of bus bars employed for this purpose necessitates an additional bus section switch, and also additional selector switches for both feeders and generators.
E, shows a standard system of connection for a city street railway system having a large number of feeders.
Figs. 2,645 and 2,646.—Diagrams illustrating general principles of switchboard connections.
This arrangement allows any group of feeders to be supplied from any group of generators.
