Cisco Gigabit Switch Router 12008 Installation And Configuration Manual page 316

Adding, Removing, or Replacing a DC-Input Power Supply
Step 24
Step 25
Caution
Step 26
Step 27
Step 28
Step 29
To verify that the new DC-input power supply is operating properly, perform the procedure
in the following section.
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Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
Before connecting each cable to the appropriate terminals on the power supply
faceplate, remove the tape (that you applied in Step 10 above) from the lug.
Strictly observe the following order in reconnecting the leads to the power
supply terminals:
Ground
(a)
+ (positive)
(b)
– (negative)
(c)
Secure each cable to the terminals using the previously removed lock washers
and nuts. Tighten the lock washers and nuts on each terminal using a 10 mm
nutdriver (or a 1/4-inch socket wrench with a 10 mm deep-well socket).
Do not overtighten the nuts on the power supply terminals.
If you intend to reconnect the external alarm monitoring facility to the circuit
breaker alarm terminal block on the new power supply, reconnect the leads as
they were on the old power supply (see Step 11).
Remove the tape securing the main source DC circuit breaker in the OFF (0)
position (see Step 3).
Set the main source DC circuit breaker to the ON (1) position.
Set the rotary power switch on the new DC-input power supply to the ON (|)
position.