Juniper SRX550, Hardware Manual

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RELATED DOCUMENTATION
SRX550 Services Gateway Power Supply | 28
Clearance Requirements for Airflow and Hardware Maintenance of the SRX550 Services Gateway | 45
SRX550 Services Gateway Electrical Wiring Guidelines | 49
Site Preparation Checklist for the SRX550 Services Gateway | 33
SRX550 Services Gateway DC Power Cable Specifications
The DC power supply in slot 0 must be powered by dedicated power feeds derived from feed A, and the
DC power supply in slot 1 must be powered by dedicated power feeds derived from feed B. This
configuration provides the commonly deployed A/B feed redundancy for the system.
CAUTION: You must ensure that power connections maintain the proper polarity.
The power source cables might be labeled (+) and (–) to indicate their polarity. There
is no standard color coding for DC power cables. The color coding used by the external
DC power source at your site determines the color coding for the leads on the power
cables that attach to the terminal studs on each power supply.
WARNING: For field-wiring connections, use copper conductors only.
For other electrical safety information, see “SRX550 Services Gateway Electrical Wiring
Guidelines” on page 49 .
CAUTION: Power cords and cables must not block access to services gateway
components or drape where people could trip on them.
Table 17 on page 53 summarizes the specifications for the power cable(s), which you must supply.
Table 17: DC Power Cable Specifications
Quantity and Specification Cable Type
8 AWG, minimum 60°C wire, or as permitted by the local code Power
53