Cabling The Ds3500 And Exp3500 Dc Power Supplies - IBM DS3500 Installation, User's, And Maintenance Manual

Cabling the DS3500 and EXP3500 dc power supplies

Statement 29
CAUTION:
This equipment is designed to enable 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 must be connected directly to the dc supply system earthing
v This equipment must be located in the same immediate area (such as adjacent
v The dc supply source must be located within the same premises as this
v Switching or disconnecting devices must not be in the earthed circuit
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 reliably grounded safety extra low voltage (SELV)
v Incorporate a readily available approved and rated disconnect device in the
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
To connect the DS3500 and EXP3500 dc power-supply cables, complete the
following steps:
1. Ensure that the power on-off switch on both of the dc power supply and fan
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IBM System Storage DS3500 and EXP3500 Storage Subsystem: Installation, User's, and Maintenance Guide
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).
field wiring.
circuit-breaker rating for branch circuit overcurrent protection.
documentation for the required wire size.
values for the wiring-terminal nuts.
units in the chassis are in the off position.