HP Cluster Platform Introduction v2010 Introduction Manual page 30

An HP Cluster Platform is provided with industry-standard power connections that typically
do not require direct connection (hard wiring) to a power supply. However, hard wiring might
be required for the following reasons:
• Local electrical standards explicitly require such wiring.
• HP recommends that you install an inline uninterruptible power supply (UPS) as part of
your site preparation. In addition to power supply conditioning, a UPS ensures high
availability and the ability to perform an orderly system shutdown (and subsequent fast
recovery) in the event of a prolonged power outage.
You cannot order UPS devices as part of an integrated cluster or as an upgrade option; you
must order them separately from HP or third parties. Depending on the model of UPS that
you choose, its installation requirements might specify a dedicated branch circuit and a
hardwired connection. Other UPS models might be pluggable. Be sure to determine the
correct connection requirement.
Note :
If you connect the cluster to a UPS, do not allow the overall cluster AC current to exceed 80
percent of the UPS's marked electrical current rating. (See
If hard wiring is required, you must arrange for suitable trained personnel to complete the wiring
circuit to the specification of the system's power distribution units (PDUs). The integrated
protection provided by each PDU is defined as follows:
• Surge suppression clamping level: 275 to 320V RMS
• Surge current: 10,000 amps per unit
• Spike protection: 500 joules, 10 x 1000 microsecond
The following PDU characteristics enable you to plan the power service for your system. You
also need to take into account the power consumption information described in
• Voltages – the PDUs shipped with your system are designed to work with worldwide
voltages.
• Your power distribution hardware must provide four grounded receptacles (outlets) per
rack for the following connectors:
— The input connector for the United States and Japan is a 3.6-m attached cable with a
prewired model L6-30P plug (NEMA standard) connector rated at 24 amps.
— The international cable has a 309-32A (IEC standard) connector rated at 32 amps.
The pin configuration of these connectors are shown in
30 Installation Planning
Section 1.7 (page 31)).
Section
Figure 1-6.
1.7.