Safety With Electricity - Cisco NCS 540 Hardware Installation Manual

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Safety Warnings

Safety with Electricity

Warning

Before working on a chassis or with power supplies, unplug the power cord on AC units. Disconnect the

power at the circuit breaker on DC units. Statement 12

Warning

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces,

and watches). Metal objects heat up when connected to power and ground and can cause serious burns or

weld the metal object to the terminals. Statement 43

Warning

Avoid using or servicing any equipment that has outdoor connections during an electrical storm. There may

be a risk of electric shock from lightning. Statement 1088

Warning

Read the installation instructions before connecting the system to the power source. Statement 1004

Warning

When you connect or disconnect the power and relay connector with power applied, an electrical arc can

occur. This action can cause an explosion in hazardous area installations. Be sure that power is removed from

the switch and alarm circuit. Be sure that power cannot be accidentally turned on or verify that the area is

nonhazardous before proceeding. Failure to securely tighten the power and relay connector captive screws

can result in an electrical arc if the connector is accidentally removed. Statement 1058

Warning

The plug-socket combination must be accessible always, because it serves as the main disconnecting device.

Statement 1019

Warning

This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence

of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician

if you are uncertain that suitable grounding is available. Statement 1024

Warning

This unit may have more than one power supply connection. All connections must be removed to de-energize

the unit. Statement 1028

Cisco NCS 540 Router Hardware Installation Guide

Safety with Electricity

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