Electrical power in an aircraft is delivered to various components through common points known as bus-bars or busses. The electrical power distribution system relies on one or more busses, and the number can differ based on the size and complexity of the aircraft. While manufacturers may use different naming conventions, terms like Essential AC Bus, Left DC Bus, and Battery Bus are frequently used. These names help indicate the bus’s importance, its power source, and the voltage it handles. It’s crucial to understand these systems, especially considering incidents such as the A319 event at London Heathrow in 2009.
