• The electrical distribution system must provide a reliable earth connection for each enclosure and the
rack.
• The rack, when configured with the enclosures, must meet the safety requirements of UL 60950-1 and IEC
60950-1.
2U Enclosures Only
Always remove all PCMs to minimize weight, before loading the enclosure into a rack.
Each PCM in each enclosure has an earth leakage current of 1.0 mA. The design of the electrical distribution
system must consider the total earth leakage current from all the PCMs in all the enclosures. The rack
requires labeling with “HIGH LEAKAGE CURRENT. Earth connection essential before connecting supply”.
5U Enclosures Only
The enclosure must only be mounted into a rack using the supplied rail kit. 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 that the drawers
are closed firmly and locked shut. Do not try to lift the enclosure by yourself (see “Safe Handling” on page 1).
The minimum open area for the rack doors is 70%.
Each PSU in each enclosure has a ground leakage current of 1.6 mA. The design of the electrical distribution
system must consider 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."
Chapter 1. Safety Guidelines 5
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