HP 600 Modular Disk System - Manual (Page 15)

Setup 15
performs an emergency shutdown of the hard drive bays within a drawer if the temperature exceeds this limit
for greater than 3 minutes. To recover the system, AC power cycle the MDS600.
CAUTION: To reduce the risk of damage to the equipment when installing third-party options:
• Do not permit optional equipment to impede airflow around the MDS600 or to increase the
internal rack temperature beyond the maximum allowable limits.
• Do not exceed the manufacturer’s TMRA.
Power requirements
Installation of this equipment must comply with local and regional electrical regulations governing the
installation of IT 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 MDS600 from power fluctuations and temporary interruptions with a
regulating UPS. This device protects the hardware from damage caused by power surges and
voltage spikes and keeps the MDS600 in operation during a power failure.
When installing more than one MDS600, you may need to use additional power distribution devices to
safely provide power to all devices. Observe the following guidelines:
• Balance the MDS600 power load between available AC supply branch circuits.
• Do not allow the overall system AC current load to exceed 80 percent of the branch circuit AC current
rating.
• Do not use common power outlet strips for this equipment.
• Provide a separate electrical circuit for each power supply in the MDS600.
Electrical grounding requirements
The MDS600 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 MDS600 connected to the same power
source, HP recommends the use of a power distribution unit (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 MDS600 is not recommended.