Preparing for Installation 2-15
Maintaining Safety wi th Electricity
Maintaining Safety with Electricity
The Cisco5814 dial shelf cards, dial shelf controller cards, and power supplies are designed to be
removed and replaced while the system is operating, without causing damage to the system.
When working with the Cisco7206 router shelf, however, you must power down the system before
removing or replacing the I/O controller and netw ork processing e ngine. F or more inf ormation, re fer
to the Cisco7200 Series Installation and Configuration Guide that shipped with your Cisco7206
router shelf.
Warning Before working on equipment that is connected to power lines, re move jewel ry (inc luding
rings, necklaces, and watches). Metal objects wil l h eat up when conn ecte d to po wer and ground and
can cause serious burns or weld the m etal obj ect to the ter mina ls. To see translations of th e war n ings
that appear in this publication, refer to the Re gulatory C ompliance an d Safety Inf ormation doc ument
that accompanied this device.
Follow these basic guidelines when working with any electrical equipment:
•Never perform any action that creates a potential hazard to people or makes the e quipment
unsafe.
Warning Read the installation instructions before you connect the system to its power source. To
see translations of the warnings that appear in this publication, refer to the Regulatory Comp liance
and Safety Information document that accompanied this device.
•Never install equipment that appears damaged.
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.
•Never install telephone jacks in wet locations unles s the jack is specifically designed for wet
locations.
•Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
•Always use caution when installing or modifying telephone lines.