NonStop NS14000 Planning Guide (H06.10+)

2 Installation Facility Guidelines
Modular Cabinet Power and I/O Cable Entry
Power and I/O cables can enter the Integrity NonStop NS14000 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. Integrity NonStop NS14000 server 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 rackmounted 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 50).
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 Integrity NonStop NS14000 Servers
Integrity NonStop NS14000 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 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 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 an Integrity NonStop NS14000
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 “AC Input Power for Modular Cabinets” (page 23).
Modular Cabinet Power and I/O Cable Entry 17