HP Performance Optimized Datacenter 20c User Guide - China

Power, electrical, and controls 28
Redundant power installation (2N load)—Each busway is powered through parallel power paths from
independent power feeds.
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.