IMPORTANT NOTE (PDU):
CAUTION: A mismatch in the wiring conguration (delta versus wye) between the IBM product
and your facility AC voltage supply can cause signicant product damage. Ensure that the
PDUs of the product match the supply voltage and wiring conguration of your facility. If the
number of wires in the power cord does not match the wiring conguration in your facility, or
if the rated voltage on the product does not match the supply voltage in your facility, or if you
have any questions about the connection method, do not connect the product to the supply
voltage. Contact a certied electrician familiar with your installation, and IBM, for guidance.
(C054)
Machine base power is customized to the customer's power source, depending on the line cord
selection. The line cord selection (voltage and phase) determines what power PDU and line cord part
numbers are required for the system.
• For three phase power, data center voltage ranges 380 - 415 V AC and 480 V AC, must be connected
with a ve wire line cord that then connects to the neutral wire. If the neutral wire is not connected,
the system will be damaged due to voltage overstress of the internal power components.
• The lower voltage range, 200 - 240 V AC (250 V AC), remains unchanged from previous systems and
must be connected with a four wire line cord - no neutral.
• Important: You MUST verify the following before continuing:
– If your system order has a 4 pin PDU side connector as shown below, conrm with the electrician
that the power source is 250 V AC (200 - 240 V AC) three phase attachment before connecting the
line cord.
– If your system order has line cords with more than 4 pins on the PDU side connector as shown
below, conrm with the electrician that the power source is 480 V AC (380 - 415 V AC or 480 V
AC) three phase attachment before connecting the line cord.
If the line cords on your system order include cut ends (bare wires) for the customer connection, the
line cords will be shipped with a labeled bag fastened over the customer end.
Do NOT remove this bag. The line cord bag should only be removed by the electrician that is
installing the line cord.
If you identify a shipped, uninstalled system that was ordered and built incorrectly for system power,
contact IBM Support for assistance.
ENG-28 IBM: 3931 Safety Inspection
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