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.
• Locate the equipment 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 must 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.
Procedure
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.
IMPORTANT: The ring terminals must be UL approved and accommodate 12 gauge wires.
IMPORTANT: The minimum nominal thread diameter of a pillar or stud type terminal must be 3.5 mm (0.138 in);
the diameter of a screw type terminal must be 4.0 mm (0.157 in).
3. Stack each same-colored pair of wires and then attach them to the same power source. The power cord consists of three
wires (black, red, and green).
For more information, see the documentation that ships with the power supply.
Installing an AC hot-plug power supply
Procedure
1. Remove the power supply blank (Rear panel components).
Hardware options installation
109
