ABSTRACT
Now suppose the load triples. We modify the system by using three sources, serving one-third the total load from three identical circuits, as shown in Figure 34.1b. Even though we have tripled the capacity, we have also tripled the conductor cost, since we now need a total of “6A” conductors. We further modify the system by making a common return path, as shown in Figure 34.1c. Apparently, this accomplishes little since the return conductor must have size 3A since it must have three times the ampacity, and we still need a total “6A” worth of conductors.
