Safety And Dedicated Ground; Grounding Requirements - HP StorageWorks XP1024 Manual

Safety and dedicated ground

Grounding requirements

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The primary reason for grounding electrical systems is safety. The safety
ground is required by the National Electric Code (USA) and most other
local, regional, and national codes. In addition to safety ground, HP
requires that a dedicated (earth reference) ground be installed as a common
reference point for all system components. You should consult with your
HP CE and your electrician to ensure that your electrical system meets all
local and national safety codes.
Your subsystem must meet all of the following conditions:
• An insulated grounding conductor that is identical in size and
insulation material and thickness to the ungrounded branch-circuit
supply conductors. It should be green, with or without yellow stripes,
and is to be installed as a part of the branch circuit that supplies the
unit or system. This means the ground conductor must be run in the
same conduit, armored cable, or other cable bundle as the phase wires.
• Grounding as prescribed by your local country codes.
• The grounding conductor mentioned above should be grounded to
earth at the service equipment or other acceptable building earth
ground such as the building frames (in the case of a high rise steel
frame structure).
• IT configured grounding systems are not certified for use with the
XP1024 as these grounding systems may not have solidly
conductor-connected grounded power systems and/or they may have
resistive impedance inserted in ground and/or neutral lines. The
XP1024 requires a solidly conductor-connected ground and may
require a separate neutral in the case of WYE or STAR connections.
HP StorageWorks Disk Array XP1024: Site Preparation Guide