Statement 34
CAUTION:
To reduce the risk of electric shock or energy hazards:
• This equipment must be installed by trained service personnel in a restricted-access location,
as defined by the NEC and IEC 60950-1, First Edition, The Standard for Safety of Information
Technology Equipment.
• Connect the equipment to a properly grounded safety extra low voltage (SELV) source. A SELV
source is a secondary circuit that is designed so that normal and single fault conditions do not
cause the voltages to exceed a safe level (60 V direct current).
• Incorporate a readily available approved and rated disconnect device in the field wiring.
• See the specifications in the product documentation for the required circuit-breaker rating for
branch circuit overcurrent protection.
• Use copper wire conductors only. See the specifications in the product documentation for the
required wire size.
• See the specifications in the product documentation for the required torque values for the
wiring-terminal screws.
Important:
Be sure to read the multilingual safety instructions on the CD that comes with the server
before you use the product.
Replacing a hot-swap dc power supply
Use this information to replace a hot-swap dc power supply.
To install a hot-swap dc power supply, complete the following steps:
Attention:
Only trained service personnel other than Lenovo service technicians are authorized to install
and remove the -48 volt dc power supply, and make the connections to and disconnections from the -48
volt dc power source. Lenovo service technicians are not certified or authorized to install or remove the
-48 volt power cable. The customer is responsible for ensuring that only trained service personnel install or
remove the -48 volt power cable.
Step 1.
Read the safety information that begins on “Safety” on page v and “Installation guidelines”
on page 34.
Step 2.
Touch the static-protective package that contains the hot-swap power supply to any unpainted
metal surface on the server; then, remove the power supply from the package and place it on
a static-protective surface.
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