Disconnecting Ac Power; Reconnecting Ac Power; Disconnecting Dc Power; Connecting Power To An Ac-Powered Chassis - Cisco NCS 4000 Series Hardware Installation

Installing Power Components
Procedure
Step 1 Power off (0) the circuit breaker assigned to the AC power source that you are disconnecting.
Step 2 Un-tighten the screw that clamps the AC power cord.
Step 3 Unplug the AC power cord from the power tray receptacle.
Caution

Disconnecting AC Power

If it becomes necessary to disconnect all AC power from the chassis, follow these steps:
Note Do not disconnect all power from the chassis to replace components, including power modules. See
Removing and Replacing Chassis Components, on page
Procedure
Step 1 Set the power switch at the rear of the AC power tray to the OFF (0) position.
Step 2
Power off (0) the circuit breakers assigned to the AC power sources that you are disconnecting.
Warning
Step 3 Loosen the retainer bracket that holds the AC power cords to the power tray receptacle.
Step 4 Unplug the AC power cords from the power tray receptacles.

Reconnecting AC Power

To reconnect an individual AC power cord to a power tray, see
on page 43

Disconnecting DC Power

It is not necessary to disconnect all power from the chassis to replace components, including power
Caution
modules.
Follow these steps to disconnect an individual DC power source from a power tray:
Do not turn off the switch on the power tray to remove AC power cords. An individual AC power
cord can be unplugged while the system is powered from other AC power sources.
To ensure that power remains off while you are performing this procedure, lock-out/tag-out the
circuit breaker switch in the OFF (0) position until you are ready to turn it on.
97.

Connecting Power to an AC-Powered Chassis,

Hardware Installation Guide for Cisco NCS 4000 Series
Disconnecting DC Power
47