SRX3400 Services Gateway DC Power Cable Specifications

Figure 79 shows a typical DC source cabling arrangement.

Figure 79: Typical DC Source Cabling to the SRX3400 Services Gateway

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The DC power supply in slot PEM0 must be powered by dedicated power feeds derived from feed A, and the DC power supply in slot PEM1 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 General Electrical Safety Guidelines and Warnings.

Caution: Power cords and cables must not block access to services gateway components or drape where people could trip on them.

For a description of the DC power supply, see SRX3400 Services Gateway DC Power Supply Overview. For instructions on connecting the DC power and grounding cables during initial installation, see Connecting the SRX3400 Services Gateway to a DC Power Source. For instructions on replacing a DC power cable, see Replacing DC Power Supply Cables on the SRX3400 Services Gateway.

Table 36 summarizes the specifications for the power cables, which you must supply.

Table 36: DC Power Cable Specifications

Cable Type

Quantity and Specification


Eight 6-AWG (13.3 mm2), minimum 60°C wire, or as permitted by the local code

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