North American Ac Power Cabling; Power Cabling In A Secondary Rack With One Or Two Disk Chassis - HP XP20000/XP24000 Manual

Figure 16 Power cabling in a secondary rack with one or two disk chassis
.

North American AC power cabling

Each XP20000 rack requires 20-amp, single-phase 200 VAC power supplied by four power cords
with plugs, four receptacles, and four main disconnect devices (circuit breakers). If the second rack
contains only one disk chassis, only two power cords and breakers are required, but four are required
if you plan to add another disk chassis.
The HP XP20000 comes from the factory with the AC power cords and plugs based on the power
option ordered.
Connect each AC power cable to a separate receptacle on a separate circuit breaker, and connect
each pair of power cords (the left pair and the right pair) to separate distribution panels to ensure
power fault tolerance.
CAUTION:
Do not apply power until instructed to do so by HP. An HP representative should be present whenever
the disk array is being connected to a new power source.
Branch circuit requirements
To protect the disk array, your building must be wired correctly. Each supply ("hot") conductor must
be protected by a short-circuit protective device and by an overcurrent protective device.
on page 55 specifies the overcurrent protective devices for single-phase operation.
58 Electrical specifications for the HP Disk Arrays
Table 24