Lenovo System x3750 M4 Installation And Service Manual page 311

• To reduce the risk of electric shock or energy hazards when installing the 750-watt -48 V to -60 V dc
power supplies, take the following steps:
– Use a circuit breaker that is rated 40 amps.
– Use 4 mm2 (10 AWG) at 60° C copper wire.
– Cut the power cable wires to the correct length, but do not cut the wires shorter than 150 mm (6 inches).
– Torque the wiring-terminal screws to 0.50 ~ 0.60 newton-meters (4.43 ~ 5.31 inch-pounds).
• For the server to support two power supplies, you must install the optional IBM Power Interposer for
Redundant Power option or the optional IBM Microprocessor and Memory Expansion Tray, if one is
not installed in your model.
Statement 8
CAUTION:
Never remove the cover on a power supply or any part that has the following label attached.
Hazardous voltage, current, and energy levels are present inside
any component that has this label attached. There are no
serviceable parts inside these components. If you suspect a
problem with one of these parts, contact a service technician.
Statement 19:
CAUTION:
The power-control button on the device does not turn off the electrical current
supplied to the device. The device also might have more than one connection
to dc power. To remove all electrical current from the device, ensure that all
connections to dc power are disconnected at the dc power input terminals.
OFF
.
Chapter 6 Removing and replacing components
297