NonStop NS16000 Series Planning Guide (H06.11+)

S-Series Hardware Installation and FastPath Guide for connector and wiring information. This guide
is available in the NonStop Technical Library (NTL).
Electrical Power and Grounding Quality
Proper design and installation of a power distribution system for an Integrity NonStop NS16000
series server requires specialized skills, knowledge, and understanding of appropriate electrical
codes and the limitations of the power systems for computer and data processing equipment. For
power and grounding specifications, refer to Chapter 3: System Installation Specifications (page 37).
Power Quality
This equipment is designed to operate reliably over a wide range of voltages and frequencies,
described in “Enclosure AC Input” (page 54). However, damage can occur if these ranges are
exceeded. Severe electrical disturbances can exceed the design specifications of the equipment.
Common sources of such disturbances are:
• Fluctuations occurring within the facility’s distribution system
• Utility service low-voltage conditions (such as sags or brownouts)
• Wide and rapid variations in input voltage levels
• Wide and rapid variations in input power frequency
• Electrical storms
• Large inductive sources (such as motors and welders)
• Faults in the distribution system wiring (such as loose connections)
Computer systems can be protected from the sources of many of these electrical disturbances by
using:
• A dedicated power distribution system
• Power conditioning equipment
• Lightning arresters on power cables to protect equipment against electrical storms
For steps to take to ensure proper power for the servers, consult with your HP site preparation
specialist or power engineer.
Grounding Systems
The site building must provide a power distribution safety ground/protective earth for each AC
service entrance to all NonStop server equipment. This safety grounding system must comply with
local codes and any other applicable regulations for the installation locale.
For proper grounding/protective earth connection, consult with your HP site preparation specialist
or power engineer.
Power Consumption
In Integrity NonStop NS16000 series systems, the power consumption and inrush currents per
connection can vary because of the unique combination of enclosures housed in the modular
cabinet. Thus, the total power consumption for the hardware installed in the cabinet should be
calculated as described in “Enclosure Power Loads” (page 55).
Uninterruptible Power Supply (UPS)
Modular cabinets do not have built-in batteries to provide power during power failures. To support
system operation through a power failure, Integrity NonStop NS16000 series servers require either
an optional UPS (such as the HP R5000 UPS) installed in each modular cabinet or a site UPS to
support system operation through a power failure. This system operation support can include a
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