Cisco ASR 14000 Series Installation Manual page 28

Chapter 2 Installing and Removing Power Components
Information About Installing and Removing the Power Components
Figure 2-4 DC Power Cable Lug
All measurements in inches
2.38
Ø 0.27
0.60
2 holes
0.25 0.63 0.38
1.16
1.44
45˚
2.38
.10
Note Be sure to follow all lug insulation instructions provided by the lug manufacturer.
The color coding of the source DC power cable leads depends on the color coding of the site DC power
source. Typically, green or green and yellow indicates that the cable is a ground cable. Because there is
no color code standard for the source DC wiring, you must ensure that the power cables are connected
to the DC-input PDU terminal studs in the proper positive (+) and negative (–) polarity.
In some cases, the source DC cable leads might have a positive (+) or negative (–) label. This is a
relatively safe indication of the polarity, but you must verify the polarity by measuring the voltage
between the DC cable leads. When making the measurement, the positive (+) lead and negative (–) lead
must always match the (+) and (–) labels on the PDU.
No damage should occur because of reverse polarity, but you should correct a reverse polarity condition
Caution
immediately.
DC PDU Wiring
This section describes how to wire the DC PDU. For more detailed information on chassis DC power
systems, see the "DC Power Systems" section on page 2-4.
Cisco ASR 14000 Series Router 8-Slot Line Card Chassis Installation Guide
2-6
OL-16973-01