Server racks contain a large number of devices that require stable electrical power. Power Distribution Units (PDUs) distribute this power from a single source to multiple outlets within the enclosure. Without a central distribution unit, separate supplies would be needed for every device, adding complexity and taking up valuable rack https://johnnyydehj.isblog.net/h1-how-power-distribution-units-support-power-management-in-server-cabinets-h1-57200904