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CAUTION: Protect the server from power fluctuations and temporary interruptions with a
regulating uninterruptible power supply. This device protects the hardware from damage
caused by power surges and voltage spikes and keeps the system in operation during a power
failure.
When installing more than one server, you might need to use additional power distribution devices to
safely provide power to all devices. Observe the following guidelines:
•
Balance the server power load between available AC supply branch circuits.
•
Do not allow the overall system AC current load to exceed 80% of the branch circuit AC current
rating.
•
Do not use common power outlet strips for this equipment.
•
Provide a separate electrical circuit for the server.
For more information on the hot-plug power supply and calculators to determine server power
consumption in various system configurations, see the Hewlett Packard Enterprise Power Advisor
website (http://www.hpe.com/info/poweradvisor/online).
Electrical grounding requirements
The server must be grounded properly for proper operation and safety. In the United States, you must
install the equipment in accordance with NFPA 70, 1999 Edition (National Electric Code), Article 250, as
well as any local and regional building codes. In Canada, you must install the equipment in accordance
with Canadian Standards Association, CSA C22.1, Canadian Electrical Code. In all other countries, you
must install the equipment in accordance with any regional or national electrical wiring codes, such as the
International Electrotechnical Commission (IEC) Code 364, parts 1 through 7. Furthermore, you must be
sure that all power distribution devices used in the installation, such as branch wiring and receptacles, are
listed or certified grounding-type devices.
Because of the high ground-leakage currents associated with multiple servers connected to the same
power source, Hewlett Packard Enterprise recommends the use of a PDU that is either permanently wired
to the building's branch circuit or includes a nondetachable cord that is wired to an industrial-style plug.
NEMA locking-style plugs or those complying with IEC 60309 are considered suitable for this purpose.
Using common power outlet strips for the server is not recommended.
Connecting a DC power cable to a DC power source
WARNING: To reduce the risk of electric shock or energy hazards:
• This equipment must be installed by trained service personnel, as defined by the NEC and
IEC 60950-1, Second Edition, the standard for Safety of Information Technology
Equipment.
• Connect the equipment to a reliably grounded Secondary circuit source. A Secondary
circuit has no direct connection to a Primary circuit and derives its power from a
transformer, converter, or equivalent isolation device.
• The branch circuit overcurrent protection must be rated 27 A.
WARNING: When installing a DC power supply, the ground wire must be connected before
the positive or negative leads.
WARNING: Remove power from the power supply before performing any installation steps or
maintenance on the power supply.
CAUTION: The server equipment connects the earthed conductor of the DC supply circuit to
the earthing conductor at the equipment. For more information, see the documentation that
ships with the power supply.
Setup 28
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