Electrical power consumers are divided into which 3 busses?

• A. Shed bus, Nonessential Bus, Essential Bus
• B. Essential Bus, Nonessential Bus, Shed bus
• C. Shed bus, Essential Bus, Main bus 1
• D. Nonessential Bus, Essential Bus, Main bus 2

Answer: (A)

Power distribution divides electrical consumers into three buses: essential, nonessential, and shed. The essential bus powers the systems that must stay on under all conditions. The nonessential bus covers items that can be turned off to save power but can be brought back when possible. The shed bus is the one that can be disconnected to reduce load when power is tight or during faults, preserving capacity for critical systems. So the correct set is shed bus, nonessential bus, and essential bus. Other options bring in a main bus, which isn’t one of the consumer categories.