General Power And Grounding Requirements - Cisco NCS 4000 Series Hardware Installation

General Power and Grounding Requirements

To avoid shock hazard, be sure to apply shrink wrap tubing around the wire entry area of the lug.
Warning
The color coding of source DC power cable leads depends on the color coding of the site DC power source.
Because there is no color code standard for source DC wiring, be sure that power source cables are connected
to the power modules using the proper positive (+) and negative (–) polarity:
• In some cases, the source DC cable leads might have a positive (+) or a negative (–) label. This is a
• A green (or green and yellow) cable typically indicates that it is a ground cable.
DC power modules contain reverse voltage protection circuitry to prevent damage to the power module
Caution
if it detects a reverse polarity condition. No damage should occur from reverse polarity, but you should
correct a reverse polarity condition immediately.
The rating label is shown in the figure below.
Figure 14: Rating Label for NCS 4000 FCC DC Chassis
General Power and Grounding Requirements
This section describes the power and grounding requirements you must consider when planning the site
facilities for the routing system. In addition, see the
information about the power requirements for your chassis type.
A qualified electrician should review the information in these sections to ensure that the installation site
Note
meets these requirements. For larger system configurations, consult a facilities electrical expert to understand
the load that the routing system may put on the facility power plant.
General power and grounding requirements are:
Hardware Installation Guide for Cisco NCS 4000 Series
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relatively safe indication of the polarity, but you must verify the polarity by measuring the voltage
between the DC cable leads . Be sure that the positive (+) and negative (–) cable leads match the positive
(+) and negative (–) labels on the power module when making the measurement.
DC Power Requirements, on page 27
Installing Power Components
for additional