Lenovo ThinkServer RD120 Safety Information Manual page 18

Statement 29:
CAUTION:
This equipment is designed to permit the connection of the earthed conductor of
the dc supply circuit to the earthing conductor at the equipment. If this
connection is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system earthing
v This equipment shall be located in the same immediate area (such as, adjacent
v The dc supply source shall be located within the same premises as this
v Switching or disconnecting devices shall not be in the earthed circuit
Statement 30:
CAUTION:
To reduce the risk of electric shock or energy hazards:
v This equipment must be installed by trained service personnel in a
v Connect the equipment to a reliably grounded safety extra low voltage (SELV)
v The branch circuit overcurrent protection must be rated 20 A.
v Use 12 American Wire Gauge (AWG) or 2.5 mm
v Incorporate a readily available approved and rated disconnect device in the
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Safety Information
electrode conductor or to a bonding jumper from an earthing terminal bar or
bus to which the dc supply system earthing electrode conductor is connected.
cabinets) as any other equipment that has a connection between the earthed
conductor of the same dc supply circuit and the earthing conductor, and also
the point of earthing of the dc system. The dc system shall not be earthed
elsewhere.
equipment.
conductor between the dc source and the point of connection of the earthing
electrode conductor.
restricted-access location, as defined by the NEC and IEC 60950-1, First
Edition, The Standard for Safety of Information Technology Equipment.
source. An 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).
exceeding 4.5 meters in length.
field wiring.
2
copper conductor only, not