IBM RS/60000 Series Site And Hardware Planning Information page 150

Dual Power Installation
The Eserver pSeries 670 is designed with a fully redundant power system. Each system has two line
cords attached to two power input ports which, in turn, power a fully redundant power distribution system
within the system. To take full advantage of the redundancy/reliability that is built into the computer
system, the system must be powered from two distribution panels. The possible power installation
configurations are described as follows.
Dual Power Installation - Redundant Distribution Panel and Switch: This configuration requires that
the system receives power from two separate power distribution panels. Each distribution panel receives
power from a separate piece of building switch gear. This level of redundancy is not available in most
facilities.
Switch Gear
Switch Gear
132
Site and Hardware Planning Information
Distribution
Panel
Distribution
Panel
System