IBM System x3550 M4 Installation And Service Manual page 299

Statement 34
CAUTION:
To reduce the risk of electric shock or energy hazards:
v 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.
v 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).
v Incorporate a readily available approved and rated disconnect device in the
field wiring.
v See the specifications in the product documentation for the required
circuit-breaker rating for branch circuit overcurrent protection.
v Use copper wire conductors only. See the specifications in the product
documentation for the required wire size.
v 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.
Chapter 6. Removing and replacing components
281