IBM Storwize V3700 Quick Installation Manual page 34

connection to DC power. To remove all electrical current from the device, ensure
that all connections to dc power are disconnected at the DC power input terminals.
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
v Connect the equipment to a properly grounded safety extra low voltage (SELV)
v Incorporate a readily available approved and rated disconnect device in the field
v See the specifications in the product documentation for the required
v Use copper wire conductors only. See the specifications in the product
v See the specifications in the product documentation for the required torque
Note: In Statement 34 above:
v Replace IEC 60950-1, First Edition with IEC 60950-1, Second Edition Amendment
v The required circuit breaker rating is 20 amps.
Direct current power supply unit connectors and indicators
Each Storwize V3700 enclosure contains two DC power supply units.DC power
supply units can be ordered as a feature of systems.
The power supply units have the components that are shown in Figure 8 on page
13.
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Storwize V3700: Quick Installation Guide
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restricted-access location, as defined by the NEC and IEC 60950-1, First Edition,
The Standard for Safety of Information Technology Equipment.
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).
wiring.
circuit-breaker rating for branch circuit overcurrent protection.
documentation for the required wire size.
values for the wiring-terminal screws.
1.