NonStop NS14000 Series Planning Guide (H06.13+)

2 Site Preparation Guidelines
This chapter describes power, environmental, and space considerations for your site.
Modular Cabinet Power and I/O Cable Entry
Power and I/O cables can enter the Integrity NonStop NS14000 series server from either the top
or the bottom rear of the modular cabinets, depending on how the cabinets are ordered from HP
and the routing of the AC power feeds at the site. NonStop NS14000 series cabinets can be
ordered with the AC power cords for the PDUs exiting either:
• Top: Power and I/O cables are routed from above the modular cabinet.
• Bottom: Power and I/O cables are routed from below the modular cabinet
NOTE: If your system includes the optional rack-mounted HP R5000 XR UPS or the HP R5500
XR UPS, the modular cabinet will have one PDU located on the rear left side and four extension
bars on the rear right side. To provide redundancy, components are plugged into the left-side
PDU and the extension bars. Each extension bar is plugged into the UPS. The R5500 XR UPS
AC input power cord is routed as described above, and the large output receptacle is unused.
For information about modular cabinet power and cable options, refer to “Modular Cabinets”
(page 41).
Emergency Power-Off Switches
Emergency Power Off (EPO) switches are required by local codes or other applicable regulations
when computer equipment contains batteries capable of supplying more than 750 volt-amperes
(VA) for more that five minutes. Systems that have these batteries also have internal EPO hardware
for connection to a site EPO switch or relay. In an emergency, activating the EPO switch or relay
removes power from all electrical equipment in the computer room (except that used for lighting
and fire-related sensors and alarms).
EPO Requirement for NonStop NS14000 Series Servers
NonStop NS14000 series servers without an optional UPS (such as an HP R5500 XR UPS) installed
in the modular cabinet do not contain batteries capable of supplying more than 750 volt-amperes
(VA) for more that five minutes, so they do not require connection to a site EPO switch.
EPO Requirement for HP 5000 UPS or HP 5500 XR UPS
The rackmounted HP 5500 XR UPS that can be optionally installed in a modular cabinet contains
batteries and has an EPO circuit. For site EPO switches or relays, consult your HP site preparation
specialist or electrical engineer regarding requirements.
If an EPO switch or relay contactor is required for your site, contact your HP representation or refer
to the HP UPS R5000 User Guide or the HP UPS R5500 XR Models User Guide for connector and
wiring. This guide is available at http://h10032.www1.hp.com/ctg/Manual/c00065453.pdf
Electrical Power and Grounding Quality
Proper design and installation of a power distribution system for a NonStop NS14000 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 41).
36 Site Preparation Guidelines