Install a protective earthing (PE) conductor that is identical in size, insulation material, and
thickness to the branch-circuit supply conductors. The PE conductor must be green with yellow
stripes. The earthing conductor described is to be connected from the unit to the building
installation earth or if supplied by a separately derived system, at the supply transformer or
motor-generator set grounding point.
Circuit Breaker
The Marked Electrical for the server is 15 amps per line cord. The recommended circuit breaker
size is 20 amps for North America. For countries outside North America, consult your local
electrical authority having jurisdiction for the recommended circuit breaker size.
The server contains four C20 power receptacles located at the bottom rear bulkhead. A minimum
of two power cords (A0–A1) must be used to maintain normal operation of the server. A second
set of two cords (B0–B1) can be added to improve system availability by protecting, for example,
against power source failures or accidentally tripped circuit breakers. The server can receive AC
input from two different AC power sources.
System AC Power Specifications
Power Cords
Table 2-5 lists the various power cables available for use with the server. Each power cord is 15
feet (4.5-m) in length with a IEC 60320-1 C19 female connector attached to one end.
Table 2-5 Power Cords
Where UsedDescriptionPart Number
International - OtherStripped end, 240 volt8120-6895
InternationalMale IEC309, 240 volt8120-6897
ChinaMale GB-1002, 240 volt8121-0070
North America/JapanMale NEMA L6-20, 240 volt8120-6903
System Power Specifications
Table 2-6 lists the AC power requirements for the servers. This table provides information to
help determine the amount of AC power needed for your computer room.
Table 2-6 HP Integrity rx8640 and HP 9000 rp8440 AC Power Requirements
CommentsValueRequirements
200–240 VACNominal input voltage
180 VACMinimum operating voltage
269 VACMaximum operating voltage
50/60 HzFrequency range (minimum - maximum)
1Number of phases
Per line cord15 ARated line current
Per line cord54 A peak for 20 msMaximum inrush current
20 msDropout carry-through time at minimum
line voltage
Per line cord20ACircuit breaker rating
Electrical Specifications 35