Server setup 35
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, HP 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.
Rack warnings and cautions
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
component is extended for any reason.
WARNING:
To reduce the risk of personal injury or equipment damage when unloading a
rack:
•
At least two people are needed to safely unload the rack from the pallet. An empty 42U
rack can weigh as much as 115 kg (253 lb), can stand more than 2.1 m (7 ft) tall, and
may become unstable when being moved on its casters.
•
Never stand in front of the rack when it is rolling down the ramp from the pallet. Always
handle the rack from both sides.
WARNING:
When installing a server in a telco rack, be sure that the rack frame is adequately
secured to the top and bottom of the building structure.
