Cisco 12410 Installation And Configuration Manual page 331

Chapter 7 Maintaining the Router
Disconnect the DC power cables from their terminals in the following order and
Step 6
note the color of each cable
a.
b.
c.
d.
e.
To prevent injury and damage to the equipment, always remove the source DC
Warning
power cables and ground from the power shelf terminals in the following order:
(1) negative (–), (2) positive (+), (3) ground.
Cisco 12010, Cisco 12410, and Cisco 12810 Router Installation and Configuration Guide
OL-11496-01
Removing and Replacing AC and DC Power Subsystem Components
Negative cable first
Positive cable next
Ground cable last
Repeat steps a, b, and c for the other PDU.
Go to Step 8.
(Figure 7-27):
7-49