Dc Power Circuit Breaker Requirements For The Mx2020 Router; Dc Power Cable Specifications For The Mx2020 Router - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide

DC Power Circuit Breaker Requirements for the MX2020 Router

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DC Power Cable Specifications for the MX2020 Router

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For PDMs, if you plan to operate a maximally configured DC-powered router, we
recommend that you provision at least 80 A @ –48 VDC (nominal) for each DC input
to the system. Use a customer site circuit breaker rated according to respective National
Electrical Code and customer site internal standards to maintain proper level of protection
for the current specified above.
If you plan to operate a DC-powered router at less than the maximum configuration, we
recommend that you provision a circuit breaker according to respective National Electrical
Code and customer site internal standards to maintain proper level of protection for the
current specified above .
For PDMs, If you plan to operate a minimally configured DC-powered router, we
recommend that you provision at least 60 A @ –48 VDC (nominal) for each input to the
system. Use a customer site circuit breaker rated according to National Electrical Code
and customer site internal standards to maintain proper level of protection for the current
specified above.
If you plan to operate a DC-powered router at less than the maximum configuration, we
recommend that you provision a circuit breaker according to respective National Electrical
Code and customer site internal standards to maintain proper level of protection for the
current specified above or each DC power supply rated for at least 125% of the continuous
current that the system draws at –48 VDC.
MX2020 DC Power Distribution Module Description on page 94
MX2020 DC Power Electrical Safety Guidelines on page 585
MX2020 DC Power Subsystem Electrical Specifications on page 179
The cable lugs attach to the terminal studs of each PDM (see
Figure 77 on page 185).
NOTE: The MX2020 supports 4-AWG DC power cable lugs for 80-A input,
and 6-AWG DC power cable lugs for 60-A input.
Figure 76 on page 185
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