¿Cuál es la distancia del centro de carga de un circuito derivado trifásico de cuatro cables, 208V, con cargas fijas no continuas provenientes de 50A a 50' (15,24 m), 30A a 70' (21,34 m), 30A a 80' (24,38 m) y 30A a 120' (36,57 m)?
a. 70.30' (21,43 m)
b. 75.71' (23,07 m)
c. 81.64' (24,88 m)
d. 92.12' (28,08 m)
b. 75.71' (23,07 m)
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