Power Distribution Considerations for Data Center Racks
A well planned rack level power distribution strategy is important to ensure continuous power to all IT equipment and to monitor and control power consumption. Proper consideration should be given to the electrical, physical as well as the manageability characteristics of the PDUs. Electrically, IT equipment should be chosen to run within the 200 - 250 range whenever possible. When loads within a rack exceed 5kW, a 3-phase PDU should typically be chosen while a 1-ph PDU is good enough for loads below 5kW. Physically, PDUs need to be easily installable and they need to have the appropriate number of outlets to power all equipment. Remotely manageable PDUs with switching and metering capabilities provide the ideal feature set for highest levels of availability as well as data center efficiency.