Site Preparation Guide, Eighth Edition - Superdome HP 9000 Systems

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Install a PE (protective earthing) conductor that is identical in size, insulation
material, and thickness to the branch-circuit supply conductors. The PE conductor
insulation must be green with yellow stripes. The earthing conductor 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.
WARNING NORDIC Class 1 Equipment
Denmark: Før tilslutning af de øvrige ledere, se medfølgende
installationsvejledning.
WARNING NORDIC Class 1 Equipment
Sweden: Apparaten skall anslutas till jordat uttag, när den ansluts till ett nätverk.
Recommended Wire SizesTable 3 shows the wire size requirements for conductors in power supply cords
(Extracted from IEC 60950, Table 11).
NOTE Specific countries require a derating factor for the wire size when running multiple conductors
in the same power cord. It is Hewlett-Packards recommendation to use only power cord
conductors sized for this derating factor.
Disconnect DevicesDisconnect devices or circuit breakers must be used to protect the system against
abnormal hazards. Table 4 details the circuit breaker specifications.
Table 3 Recommended Wire Sizes
Current Wire Size Derating Factor
0-25 Amps 2.5 mm (14 AWG) 4 mm (12 AWG)
25-32 Amps 4 mm (12 AWG) 6 mm (10 AWG)
32-40 Amps 6 mm (10 AWG) 10 mm (8 AWG)
40-63 Amps 10 mm (8 AWG) 16 mm (6 AWG)
63-80 Amps 16 mm (6 AWG) 25mm (4 AWG)
Table 4 Wall Disconnect Device Circuit Breaker Specification
Agency approvals: UL, CSA, VDE
Interrupt capacity 5,000A minimum
Breaker type Magnetic trip
Voltage rating 250V minimum 3-pole+PE, 420V minimum
4-pole+PE
Input Source 3 pole + PE or 4-pole + PE