Dc Power Supply Earth Grounding Studs On Chassis; Overcurrent Protection; Temperature And Ventilation - Kontron CG2300 Installation And Maintenance Manual

9.2.4

DC Power Supply Earth Grounding Studs on Chassis

For instructions about how the safety earth grounding wire is attached to the chassis for use with DC power supplies, see Figure
53, "DC Power Supply Grounding" in Section 5.3.2 "Adding or Replacing a Power Supply Unit".
Mains DC power disconnect: You are responsible for installing a properly rated DC power disconnect for the server system. This
mains disconnect must be readily accessible, and it must be labeled as controlling power to the server. The UL listed circuit
breaker of a centralized DC power system may be used as a disconnect device when easily accessible and should be rated no
more than 15 amps.
Grounding the server: This server is intended for installation with an isolated DC return (DC-I per NEBS GR-1089, Issue 3). To
avoid the potential for an electrical shock hazard, you must reliably connect an earth grounding conductor to the server. The earth
grounding conductor must be a minimum 12 AWG connected to the earth ground stud(s) on the rear of the server. The safety
ground conductor should be connected to the chassis stud with a Listed closed two-hole crimp terminal having 5/8-inch pitch.
The nuts on the chassis earth ground studs should be installed with a 10 in-lbs of torque. The safety ground conductor provides
proper grounding only for the server. You must provide additional, proper grounding for the rack and other devices installed in it.
9.2.5

Overcurrent protection

Overcurrent protection UL Listed circuit breakers must be provided as part of each host equipment rack and must be
incorporated in the field wiring between the DC source and the server. The branch circuit protection shall be rated minimum 75
VDC, 15A maximum per feed pair. If the DC power system for the equipment rack is installed with more than 15 amperes of
protection, you must provide supplemental protection for the server. The overall current rating of a maximum configured server is
13 amperes.
9.2.6

Temperature and Ventilation

:
CAUTION Temperature -- The temperature, in which the server operates when installed in an equipment rack, must not go below
5°C (41°F) or rise above 40°C (104°F). Extreme fluctuations in temperature can cause a variety of problems in the server.
:
CAUTION Ventilation -- The equipment rack must provide sufficient airflow to the front of the server to maintain proper cooling.
The rack must also include ventilation sufficient to exhaust a maximum of 1023 BTUs (British Thermal Units) per hour for the
server. The rack selected and the ventilation provided must be suitable to the environment in which the server will be used.
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Figure 67: DC Power Supply Mating Connector
Installation and Maintenance Guide
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