Site Electrical Wiring Guidelines; Table 12: Site Electrical Wiring Guidelines; Environmental Requirements And Specifications For Ex Series Switches; Table - Juniper EX4600 Series Hardware Manual

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Site Electrical Wiring Guidelines

Copyright © 2014, Juniper Networks, Inc.
Prevention of Electrostatic Discharge Damage on page 120
Environmental Requirements and Specifications for EX Series Switches on page 35
Environmental Requirements and Specifications for a QFX3100 Director Device
Environmental Requirements and Specifications for a QFX3008-I Interconnect Device
Environmental Requirements and Specifications for a QFX3500 Device
Environmental Requirements and Specifications for QFX3600 and QFX3600-I Devices
Environmental Requirements and Specifications for a QFX5100 Device
This topic applies to hardware devices in the EX Series product family, which includes
switches, the EX Series Redundant Power System (RPS), and the XRE200 External
Routing Engine.
This topic also applies to hardware devices in the QFX Series.
Table 12 on page 33 describes the factors you must consider while planning the electrical
wiring at your site.
WARNING: It is particularly important to provide a properly grounded and
shielded environment and to use electrical surge-suppression devices.

Table 12: Site Electrical Wiring Guidelines

Site Wiring Factor Guidelines
Signaling limitations If your site experiences any of the following problems, consult experts in
electrical surge suppression and shielding:
Improperly installed wires cause radio frequency interference (RFI).
Damage from lightning strikes occurs when wires exceed recommended
distances or pass between buildings.
Electromagnetic pulses (EMPs) caused by lightning damage unshielded
conductors and electronic devices.
Radio frequency To reduce or eliminate radio frequency interference (RFI) from your site
interference wiring, do the following:
Use a twisted-pair cable with a good distribution of grounding
conductors.
If you must exceed the recommended distances, use a high-quality
twisted-pair cable with one ground conductor for each data signal when
applicable.
Chapter 6: Site Preparation
33