Electrical Grounding Requirements; Rack Planning Resources; Rack Warnings - HP 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure User Manual

• Balance the enclosure 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 enclosure.

Electrical grounding requirements

The enclosure 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 enclosures 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 enclosure is not recommended.

Rack planning resources

The rack resource kit ships with all HP-branded or Compaq-branded 9000, 10000, and H9 Series
racks. For more information on the content of each resource, see the rack resource kit documentation.
If you intend to deploy and configure multiple servers in a single rack, see the white paper on
high-density deployment at the HP website: http://www.hp.com/products/servers/platforms.

Rack warnings

WARNING!
To reduce the risk of personal injury or damage to the equipment, be sure that:
The leveling jacks are extended to the floor.
The full weight of the rack rests on the leveling jacks.
The stabilizing feet are attached to the rack if it is a single-rack installation.
The racks are coupled together in multiple-rack installations.
Only one component is extended at a time. A rack may become unstable if more than one com-
ponent is extended for any reason.
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