Site Preparation Guide, Third Edition - HP 9000 rp7420 Server

Chapter 1

System Specifications

Electrical Specifications

This section provides electrical specifications for HP 9000 rp7420 Server.

Grounding

The site building shall provide a safety ground for each AC service entrance to all cabinets.

Install a protective earthing 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 must 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 HP 9000 rp7420 Server is 12 amps. 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 HP 9000 rp7420 Server contains four C20 power receptacles located at the bottom rear bulkhead. A

minimum of two power cords must be used to maintain normal operation of the HP 9000 rp7420 Server. A

second set of two cords can be added to improve system availability by protecting, for example, against power

source failures or accidentally tripped circuit breakers. The HP 9000 rp7420 Server can receive AC input from

two different AC power sources.

System AC Power Specifications

Power Cords

Table 1-3 lists the various power cables available for use with a HP 9000 rp7420 Server system. Each power

cord is 15 feet (4.5 meters) in length with a IEC 60320-1 C19 female connector attached to one end.

System Power Specifications

Table 1-4 lists the AC power requirements for an HP 9000 rp7420 Server. This table provides information to

help determine the amount of AC power needed for your computer room.

Table 1-3 Power Cords

Part Number Description Where Used

8120-6895 Stripped end, 240 volt International–Other

8120-6897 Male IEC309, 240 volt International–Europe

8121-0070 Male GB-1002, 240 volts China

8120-6903 Male NEMA L6-20, 240 volt North America/Japan