111.51-3—Protection of vital equipment.
(a)
The coordination of overcurrent protective devices must be demonstrated for all potential plant configurations.
(1)
A short-circuit on a circuit that is not vital to the propulsion, control, or safety of the vessel does not trip equipment that is vital; and
(2)
A short-circuit on a circuit that is vital to the propulsion, control, or safety of the vessel is cleared only by the protective device that is closest to the point of the short-circuit.