Antes de trabajar en un circuito, se debe primero:

a. verificar que el circuito esté rotulado y bloqueado.
b. usar un equipo de prueba para revisar el circuito.
c. revisar el calibrado del equipo de prueba.
d. verificar el funcionamiento del equipo de prueba.


a. verificar que el circuito esté rotulado y bloqueado.

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