Rack System Safety Precautions - IBM 5147-084 Installation And User Manual

DANGER
HIGH LEAKAGE CURRENT. Earth connection essential before connecting supply.
CAUTION:
The PSUs contain double pole/neutral fusing. Ensure that your electrical installation can support this
type of fusing.
Important: If the enclosure is equipped with I/O modules having an RJ45 socket, that socket is for
Ethernet connection only and must not be connected to a telecommunications network.

Rack system safety precautions

The enclosure must be mounted in a rack before use.
The rack must be capable of supporting the total weight of the installed enclosure(s). A fully populated
enclosure weighs up to 135kg (298lbs). The design should incorporate stabilizing features suitable to
prevent the rack from tipping or being pushed over during installation or in normal use.
When loading a rack with enclosures, fill the rack from the bottom up. When removing enclosures, empty
from the top down.
CAUTION:
The enclosure must be mounted into a rack using the supplied rail kit only. Due to its weight and
length, the enclosure must not be flange mounted.
Before mounting the enclosure, remove all DDIC modules from both drawers and make sure the drawers
are closed firmly and locked shut. Do not try to lift the enclosure by yourself (see "Handling").
CAUTION:
Never move more than one enclosure out of the rack at any one time. There is a danger of the rack
falling over.
The system must be operated with low pressure rear exhaust installation. The back pressure created by
the rack doors and obstacles is not to exceed 5 pascals (0.5mm water gauge).
The minimum open area for the rack doors is 70%.
The rack design should take into consideration the maximum operating ambient temperature for the
enclosure, which is 35°C.
The rack must have a safe electrical distribution system. It must provide overcurrent protection for the
enclosure and must not be overloaded by the total number of enclosures installed in the rack. When
addressing these concerns, consideration should be given to the electrical power consumption rating
shown on the nameplate.
The electrical distribution system must provide a reliable ground for each enclosure, and for the rack.
Each PSU in each enclosure has a ground leakage current of 1.6mA. The design of the electrical
distribution system must take into consideration the total ground leakage current from all the PSUs in all
the enclosures. The rack must be labeled with the words: "HIGH LEAKAGE CURRENT. Ground
connection essential before connecting supply."
The rack must meet the safety requirements of UL 60950-1 and IEC 60950-1.
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Chapter 1. Appliance safety precautions