La longitud del centro de carga para una de alimentación con derivaciones con cargas de 130 A a 45' (13,72 m), 100 A a 70' (21,33 m), 50 A a 100' (30,48 m) y 60 A a 150' (45,72 m) es de:
a. 70.65'.
b. 73.20'.
c. 75.94'.
d. 78.97'.
d. 78.97'.
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