84
SPARC Enterprise T5140 and T5240 Servers Installation Guide • July 2009
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The server must not be directly connected to a centralized DC mains.
Related Information
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“DC Supply and Ground Conductor Requirements” on page 84
DC Supply and Ground Conductor
Requirements
The server must meet the following:
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Suitable conductor material: Use copper conductors only
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Power supply connections through the input connector: 12 AWG (between the
server and the source). There are three conductors:
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-48V or -60V (negative terminal)
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Chassis ground connection
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-48V or -60V Return (positive terminal)
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System ground conductor: 12 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
retardant
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Provide a Wago Type 721-103/037-000 mating connector for proper connection to
the DC connectors supplied with the server (Wago Type 721)
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Branch circuit cable insulation color: According to 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
IEC 60950-1
Note –
Depending on the DC power source, the -48V or -60V (negative terminal)
might be marked with a minus (-) symbol. The -48V or -60V Return (positive
terminal) might be marked with a positive (+) symbol.
When attaching DC cables, keep the following caution in mind:
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