Hitachi HA820 G2 User Manual page 53

Power requirements
Installation of this equipment must comply with local and regional electrical regulations governing the installation
of information technology equipment by licensed electricians. This equipment is designed to operate in
installations covered by NFPA 70, 1999 Edition (National Electric Code) and NFPA-75, 1992 (code for Protection
of Electronic Computer/Data Processing Equipment). For electrical power ratings on options, refer to the product
rating label or the user documentation supplied with that option.
WARNING: To reduce the risk of personal injury, fire, or damage to the equipment, do not overload the AC
supply branch circuit that provides power to the rack. Consult the electrical authority having jurisdiction
over wiring and installation requirements of your facility.
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.
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, 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, Hitachi Vantara 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.
Hitachi Advanced Server HA820 G2 User Guide 53