IBM G8124 Installation Manual page 23

CAUTION:
Ensure that the building power circuit breakers are turned off BEFORE you
connect the power cord or cords to the building power. (C023)
CAUTION:
To reduce the risk of electrical shock or energy hazards:
v This equipment must be installed by trained service personnel in a
restricted access location, as defined by NEC and IEC 60950, The Standard
for Safety of Information Technology Equipment.
v Connect the equipment to a reliably 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 volts DC).
v The branch circuit overcurrent protection must be rated per the following
table.
v Use copper wire conductor only, not exceeding 3 m (9.8 ft.) in length and
sized according to the following table.
v Torque the wiring-terminal screws to the values in the following table.
v Incorporate a readily available approved and rated disconnect device in the
field wiring.
(C033)
Table 2. Power specifications
Power
Circuit breaker rating
Wire size
Wiring terminal screw torque
Each power supply can be connected to a separate DC power source to mitigate
the risk of down time during a power failure. When used in a redundant
configuration, the dual power supplies have a load-sharing capability that allows
each supply to operate at approximately 50 percent of full load. Using redundant
power can minimize the power disruption during a power supply failure and extend
the expected lifetime of each supply by operating normally in a conservative power
mode.
There is no power switch on the RackSwitch; the switch unit powers up when
power is supplied through the DC power source.
The Power Supply LED indicates the status of the power supplies. The LED flashes
when only one DC power source is connected, and is steady when both DC power
sources are connected.
Note: DC power is not available for the RackSwitch G8124-E.
Specification
Minimum and maximum: 20 amps
v 16 AWG DC power cable from PDP output
to server input)
v 1.31 mm2
v inch pounds
v newton meters
Chapter 1. Introduction
7