NonStop NS1200 Planning Guide

Figure 3-4 Bottom AC Power Feed With UPS and ERM Installed
Each PDU is wired to distribute the load segments to its receptacles.
CAUTION: If you are installing Integrity NonStop NS1200 system enclosures in a rack, balance
the current load among the available load segments. Using only one of the available load segments,
especially for larger systems, can cause unbalanced loading and might violate applicable electrical
codes. Connecting the two power plugs from an enclosure to the same load segment causes
failure of the hardware if that load segment fails.
PDU Strapping Configurations
PDUs are available in four static strapping configurations that are factory-installed in a modular
cabinet. The specific PDU strapping configuration for a particular site depends on the type and
voltage of AC power at the intended installation site for the system. For information on the PDUs
supported for an Integrity NonStop NS1200 system, refer to “AC Input Power for Modular
Cabinets” (page 40)
AC Input Power for Modular Cabinets
This subsection provides information about AC input power for modular cabinets and covers
these topics:
• “North America and Japan: 208 V AC PDU Power” (page 41)
• “North America and Japan: 200 to 240 V AC PDU Power” (page 41)
• “International: 380 to 415 V AC PDU Power” (page 42)
• “International: 200 to 240 V AC PDU Power” (page 42)
• “Branch Circuits and Circuit Breakers” (page 42)
• “Enclosure AC Input” (page 43)
• “Enclosure Power Loads” (page 43)
40 System Installation Specifications