Juniper MX2008 Hardware Manual page 576

For personal safety, connect the green and yellow wire to safety (earth) ground at both the router and
the supply side of the DC wiring.
The marked input voltage of –48 VDC for a DC-powered router is the nominal voltage associated with
the battery circuit, and any higher voltages are to be associated only with float voltages for the charging
function.
Because the router is a positive ground system, you must connect the positive lead to the terminal
labeled RTN, the negative lead to the terminal labeled –48V, and the earth ground to the chassis grounding
points.
SEE ALSO
General Electrical Safety Guidelines and Electrical Codes for Juniper Networks Devices | 572
Site Electrical Wiring Guidelines for MX Series Routers | 590
DC Power Electrical Safety Warnings for Juniper Networks Devices | 576
DC Power Electrical Safety Warnings for Juniper Networks Devices
IN THIS SECTION
DC Power Copper Conductors Warning | 577
DC Power Disconnection Warning | 578
DC Power Wiring Terminations Warning | 581
When working with DC-powered equipment, observe the following warnings:
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