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Chapter 1 - Getting Started
The power feed must be electrically isolated from any AC power source, provide
a reliable connection to earth (battery room positive bus is connected to the
grounding electrode), and capable of providing up to 600 watts of continuous
power per feed pair.
Overcurrent Protection Requirements
Overcurrent protection devices must be provided as part of each equipment rack.
Circuit breakers must be located between the DC power feed source and the
power supplies (two 20 amp double-pole fast rip DC-rated circuit breakers for
each power supply).
NOTE:
Power supply overload protection will shut down the power supply when the
output power rating exceeds 110% to 130% of maximum rated output current.
DC Supply and Ground
You DC supply and ground conductor must meet the following requirements:
6
Optional DC Hot Swappable Power Supplies
Overcurrent protection devices must meet applicable national and local
electrical safety codes and be approved for the intended application.
Suitable conductor material: copper only.
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Power supply connections through the input connectors; 12AWG:
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-48V
-48V Return
Ground to the power supply
System ground conductor: 8 AWG.
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Cable insulation rating: minimum of 75 C, low smoke fume (LSF), flame
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retardant.
Branch circuit cable insulation color: per applicable national electrical
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codes.
Cable type: UL style 1028, UL 1581(VW-1), IEEE 383 compliant, or IEEE
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1202-1991 compliant.
Grounding insulation color: green/yellow.
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