Cisco Systems 7000 Manual De Usuario
S e n d d o c u m e n t c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
2-4
Cisco Nexus 7000 System Site Preparation Guide
OL-15846-01
Chapter 2 Preparing the Site
Shock and Vibration
Note
To predict and prevent strong EMI, you might need to consult experts in radio frequency interference
(RFI).
(RFI).
The wiring is unlikely to emit radio interference if you use twisted-pair cable with a good distribution
of grounding conductors. If you exceed the recommended distances, use a high-quality twisted-pair
cable with one ground conductor for each data signal when applicable.
of grounding conductors. If you exceed the recommended distances, use a high-quality twisted-pair
cable with one ground conductor for each data signal when applicable.
If the wires exceed the recommended distances, or if wires pass between buildings, give special
consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by
lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors
to destroy electronic devices. You may want to consult experts in electrical surge suppression and
shielding if you had similar problems in the past.
consideration to the effect of a lightning strike in your vicinity. The electromagnetic pulse caused by
lightning or other high-energy phenomena can easily couple enough energy into unshielded conductors
to destroy electronic devices. You may want to consult experts in electrical surge suppression and
shielding if you had similar problems in the past.
Shock and Vibration
The Nexus 7000 Series has been shock- and vibration-tested for operating ranges, handling, and
earthquake standards to Network Equipment Building Standards (NEBS) Zone 4 per GR-63-Core.
earthquake standards to Network Equipment Building Standards (NEBS) Zone 4 per GR-63-Core.
Grounding
The Nexus 7000 Series is sensitive to variations in voltage supplied by the AC-power source.
Overvoltage, undervoltage, and transients (or spikes) can erase data from the memory or cause
components to fail. To protect against these types of problems, you should always properly ground power
cables.
Overvoltage, undervoltage, and transients (or spikes) can erase data from the memory or cause
components to fail. To protect against these types of problems, you should always properly ground power
cables.
Power Source
You should use a dedicated power circuit (rather than sharing a circuit with other heavy electrical
equipment). We recommend that the Nexus 7000 Series have two separate AC-power sources. For each
power supply, connect each of its AC-power cables to an independent power source.
equipment). We recommend that the Nexus 7000 Series have two separate AC-power sources. For each
power supply, connect each of its AC-power cables to an independent power source.
Before you connect the power supplies to the AC power, you must install the power supplies in the Nexus
7010 chassis and you must have one 20A AC receptacle for each power cable that you need to connect
to the Nexus 7010 power supplies. Each receptacle should be on a separate circuit and should be located
on the rack within reach of the power cables when they are attached to the power supplies.
7010 chassis and you must have one 20A AC receptacle for each power cable that you need to connect
to the Nexus 7010 power supplies. Each receptacle should be on a separate circuit and should be located
on the rack within reach of the power cables when they are attached to the power supplies.