IBM eServer xSeries 255 Option Installation Manual page 76

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 6:
CAUTION:
If you install a strain-relief bracket option over the end of the power cord that
is connected to the device, you must connect the other end of the power cord
to an easily accessible power source.
64
IBM xSeries 255 Type 8685: Option Installation Guide