The rack PDU manages and distributes power, and is usually installed directly on the rack, taking power from the rack power supply (branch circuit), and distributing it from an uninterruptible power supply, utility power, generator, or other auxiliary power source (either AC. The rack PDU manages and distributes power, and is usually installed directly on the rack, taking power from the rack power supply (branch circuit), and distributing it from an uninterruptible power supply, utility power, generator, or other auxiliary power source (either AC. However, a power distribution board is installed alongside electrical wirings to ensure that the electricity is equally and consistently distributed throughout the house. What is a power distribution board? A power distribution board is one of the essential components used for electrical wirings in. A distribution box is a key part of electrical systems in buildings. It helps control and distribute electricity to different areas. Inside, you'll find parts like circuit breakers and fuses that protect the system from problems like overloads and short circuits. It can protect circuits, regulate voltage, and isolate and control.