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Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide
OL-1984-06
Chapter 2 Preparing for Installation
Safety
Figure 2-1 Lifting the Chassis
Safety with Electricity
The Ethernet controller and upstream and downstream switch modules are designed to be removed and
replaced while the system is operating without presenting an electrical hazard or damage to the system.
Caution You must power down the system before removing or replacing the power supply assembly.
Follow these basic guidelines when working with any electrical equipment:
• Before beginning any procedures requiring access to the chassis interior, locate the emergency
power-off switch for the room in which you are working.
• Disconnect all power and external cables before installing or removing a chassis.
• Do not work alone if potentially hazardous conditions exist.
• Never assume that power has been disconnected from a circuit; always check.
• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
• Never install equipment that appears damaged.
• Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
Warning
Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units.
Statement 12
.
In addition, use the guidelines that follow when working with any equipment that is disconnected from
a power source, but still connected to telephone wiring or other network cabling:
• Never install telephone wiring during a lightning storm.
