Hot-plug power supply calculations
For more information on the hot-plug power supply and calculators to determine server power consumption in
various system configurations, see the Hewlett Packard Enterprise Power Advisor website (
www.hpe.com/info/poweradvisor/online
Connecting a DC power cable to a DC power source
WARNING:
To reduce the risk of electric shock or energy hazards:
• This equipment must be installed by trained service personnel, as defined by the NEC and IEC
60950-1, Second Edition, the standard for Safety of Information Technology Equipment.
• Connect the equipment to a reliably grounded Secondary circuit source. A Secondary circuit has no
direct connection to a Primary circuit and derives its power from a transformer, converter, or
equivalent isolation device.
• The branch circuit overcurrent protection must be rated 27 A.
WARNING:
When installing a DC power supply, the ground wire must be connected before the positive
or negative leads.
WARNING:
Remove power from the power supply before performing any installation steps or
maintenance on the power supply.
CAUTION:
The server equipment connects the earthed conductor of the DC supply circuit to the
earthing conductor at the equipment. For more information, see the documentation that ships with the
power supply.
CAUTION:
If the DC connection exists between the earthed conductor of the DC supply circuit and the
earthing conductor at the server equipment, the following conditions must be met:
• This equipment must be connected directly to the DC supply system earthing electrode conductor or
to a bonding jumper from an earthing terminal bar or bus to which the DC supply system earthing
electrode conductor is connected.
• This equipment should be located in the same immediate area (such as adjacent cabinets) as any
other equipment that has a connection between the earthed conductor of the same DC supply circuit
and the earthing conductor, and also the point of earthing of the DC system. The DC system should
be earthed elsewhere.
• The DC supply source is to be located within the same premises as the equipment.
• Switching or disconnecting devices should not be in the earthed circuit conductor between the DC
source and the point of connection of the earthing electrode conductor.
To connect a DC power cable to a DC power source:
1.
Cut the DC power cord ends no shorter than 150 cm (59.06 in).
2.
If the power source requires ring tongues, use a crimping tool to install the ring tongues on the power cord
wires.
Hot-plug power supply calculations
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