User Manual

Power, electrical, and controls 30
• Redundant power installation (2N load)—Four busways are powered from one power feed, and the
remaining four busways are powered from a different power feed.
Drop boxes
The internal electrical busways provide a location to connect each of the drop boxes, which then power the
PDUs. Stagger the drop boxes on the electrical busways by connecting one drop box to busway #1 and
connecting the next drop box to busway #2. A staggered configuration enables load balancing with the rack
equipment and is necessary to ensure redundancy.
Side view shown
Disabling power
• To disable power to a single PDU, open the drop box breaker that powers the PDU, and then disconnect
the PDU from the drop box.
• To disable power to a single rack, open the drop box breakers that power each of the PDUs installed
in that rack.
• To disable power to a single busway, open the appropriate breaker for that busway on the
corresponding electrical busway panel on the HP POD 40c G2 exterior.