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Safety with Electricity
Warning
Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces,
and watches). Metal objects will 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
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
Warning
Read the installation instructions before connecting the system to the power source. Statement 1004
Warning
This product relies on the building's installation for short-circuit (overcurrent) protection. For a DC installation,
ensure that the branch circuit breaker is rated a maximum 15A for DC systems. For AC systems, 15A for
voltages greater than 200Vac; 20A for voltages below 127Vac. Statement 1005
Warning
Take care when connecting units to the supply circuit so that wiring is not overloaded. Statement 1018
Warning
The plug-socket combination must be accessible at all times, because it serves as the main disconnecting
device. Statement 1019
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage
(TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and
WAN ports both use RJ45 connectors. Use caution when connecting cables. Statement 1021
Warning
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022
Warning
To reduce the risk of fire, use only 26 AWG or larger telecommunication line cord. Statement 1023
Cisco NCS 4201 Hardware Installation Guide
16
Preparing for Installation
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