Step 6. Attach the dc power cable to the new power supply. Make sure that the power cable wires are
connected securely to the -48 V, ground, and to the -48 V return terminals (as shown in the
following illustration). Make sure that:
1. You use 4 mm2 (10 AWG) at 60° C copper wire.
2. Cut the power cable wires to the correct length, but do not cut the wires shorter than 150 mm
(6 inches).
3. Torque the wiring-terminal screws to 0.50 ~ 0.60 newton-meters (4.43 ~ 5.31 inch-pounds).
Power input LED
Power output LED
Power error LED
-48V
Ground
-48V return
Step 7. Insert the power-supply spacer into the left side of the power-supply bay (against the bay wall) and
slide it in until it snaps into place on the tabs on the side of the power supply bay.
Filler
panel
Spacer
750-watt ac
power supply
Power supply
release tab
Spacer
release tab
Step 8. Grasp the handle on the rear of the power supply and slide the power supply into the bay (next to
the spacer) until it clicks into place and is seated firmly into the connector.
Step 9. Connect the other ends of the dc power cable to the dc power source.
Note: When you install additional power supplies, place the following power rating label that
comes with the power supply option on the rear of the server.
Step 10. Turn on the circuit breaker(s) for the dc power supplies.
Step 11. Route the power cable through the cable hook-and-loop on the rear of the server so that it does not
accidentally become unplugged.
106
System x3850 X6 and x3950 X6 Installation and Service Guide
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