Dc-Powered Chassis - Cisco NCS 4000 Series Hardware Installation

Installing Power Components
The rating label is shown in the figure below.
Figure 85: Rating Label for NCS 4009 AC Chassis

DC-Powered Chassis

Use a 6 AWG wire rated 75°C minimum, for DC power modules connection. The system accepts a nominal
input voltage of -48 VDC or -60VDC, with an operational tolerance range of -40.5 to -72 VDC. One dedicated,
commensurately rated DC power source is required for each power module connection. Each power feed shall
be provided with a double pole breaker, rated not more than 60A, with medium delay.
Follow the power and sizing requirements for your site.
Note
The Short Circuit protection Breaker shall not be rated more than 60A.
Note
Power redundancy requirements vary based on the system configuration (number and type of line cards, etc.).
DC-powered systems are N+1 protected.
Power connections to the power tray for each DC power module requires four cables: two source cables and
two return cables.
For DC power cables, we recommend 6 AWG high-strand-count copper wire cables, rated 75°C minimum.
The size of the cables depends on your chassis location from the source power. Follow your local practices
for determining cable size. DC power cables are not available from Cisco, but they are available from any
commercial cable vendor.
You must terminate DC power cables using cable lugs at the power tray end. The appropriate lugs are provided
in the installation kit with 6 AWG cable. Use Panduit part number LCD4-14AF-L or the equivalent.
Warning Hazardous voltage or energy may be present on power terminals. Always replace cover when
terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in
place. Statement 1086
Hardware Installation Guide for Cisco NCS 4000 Series
DC-Powered Chassis
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