What is a bus bar and how does it contribute to system reliability and fault isolation in an aircraft?

• A. A low-impedance conductor that distributes power; centralizes connections and reduces resistance between source and loads; supports easier fault isolation.
• B. A type of sensor that measures bus voltage and triggers alarms.
• C. A circuit breaker used to isolate trouble.
• D. A ground reference network for avionics.

Answer: (C)