Chapter 3
HP Blade Server bh7800 Power
Connecting AC Power using a PDU
48
Connecting AC Power using a PDU
The bh7800 temporarily draws a large inrush current, when first connected to an AC power source. The
inrush current is much greater than the bh7800’s normal operating current and generally, the AC power
source can handle the normal inrush current.
Power Distribution Unit (PDU)
A PDU may be used at customer sites to reduce the number of circuit breaker slots needed.
This PDU may be referred to as a Relocatable Power Tap outside Hewlett-Packard.
CAUTION The bh7800 requires a theoretical maximum of 16.0 amps at 100V AC, 13.9 amps at 115V AC,
8.0 amps at 200V AC and 6.7 amps at 240V AC. Follow local electrical codes for installing the
proper sized wiring and circuit breaker for your installation.
When the bh7800 is installed in a HP Rack System/E rack, it can be used with several PDU styles. The
following PDUs will work with the bh7800:
• 16 amp 100-240VAC
• 30 amp 200-240VAC
• 60 amp 200-240VAC
The 60 amp PDU takes up 3-EIA units in a Rack System/E rack. Therefore, a maximum of two bh7800
chassis can be mounted in a 2.0m cabinet when using this PDU. Up to three bh7800 chassis can be mounted
in the 2.0m Rack System/E rack when using the 30 amp or 16 amp PDU, or an external cabinet PDU/power
solution.
Documentation for installation will accompany the PDU. Documentation may also be found at the Rack
Solutions Web site at http://www.hp.com/racksolutions.
Table 3-2 contains a list of the power cords approved for the bh7800 for connection to a PDU or UPS as noted
in the cord description column.
Table 3-2 PDU and UPS Power Cords
Part Number
Plug Type at
Power Supply
Cord Description Cord Length
8120-6884 C19 C19/C20 Jumper
Cord from PDU to
Server
2.5 m
8120-6961 C19 C19/C20 Jumper
Cord from PDU to
Server
4.5 m
8120-8494 C19 240V NA UPS
C19/L6-30P
4.5 m
