Input Power Restrictions; Dc Supply And Ground Conductor Requirements - Sun Oracle SPARC T5120 Installation Manual

Input Power Restrictions

The following restrictions apply to the Sun SPARC Enterprise T5220 server with DC
input power:
The DC version of the server must be installed in a restricted-access location.
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According to the intent of the National Electrical Code, a restricted-access location
is an area intended for qualified or trained personnel only and has access
controlled by a locking mechanism, such as a key lock or an access card system.
The server must not be directly connected to centralized DC mains.
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DC Supply and Ground Conductor Requirements

The server ground conductor must meet the following requirements:
Suitable conductor material: use copper conductors only
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Power supply connections through the input connector: 8 AWG (between the
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server and the source). There are three conductors:
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System ground conductor: 8 AWG (to be connected to the chassis)
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Cable insulation rating: Minimum of 75˚C (167˚F), low smoke fume (LSF), flame
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retardant
Provide the mating connector, Wago Part Number 51204745, for proper connection
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to the DC connectors supplied with the server.
This connector requires a 4mm flat-blade screwdriver to insert wires into the
connector body.
Branch circuit cable insulation color: Per applicable National Electrical Codes
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Grounding cable insulation color: Green/Yellow
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DC power source must meet TNV-2 requirements as defined by UL 60950-1 and
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IEC 60950-1
Note – Depending on the DC power source, the -48V or -60V (negative terminal)
might be marked with a minus (-) symbol, and the -48V or -60V Return (positive
terminal) might be marked with a positive (+) symbol.
When attaching DC cables, keep the following caution in mind:
102 SPARC Enterprise T5120 and T5220 Servers Installation Guide • October 2010
-48V or -60V (negative terminal)
Chassis ground connection
-48V or -60V Return (positive terminal)