Environmental Requirements And Specifications For Ex Series Switches; Table 26: Site Electrical Wiring Guidelines - Juniper EX3200 Series Complete Hardware Manual

Complete Hardware Guide for EX3200 and EX4200 Ethernet Switches

Table 26: Site Electrical Wiring Guidelines

Site Wiring Factor
Signaling limitations
Radio frequency interference
Electromagnetic compatibility
Related Topics

Environmental Requirements and Specifications for EX Series Switches

90
General Safety Guidelines and Warnings for EX Series Switches on page 207
General Electrical Safety Guidelines and Warnings for EX Series Switches on page 235
Prevention of Electrostatic Discharge Damage on EX Series Switches on page 236
Power Supply in EX2200 Switches
Power Supply in EX3200 and EX4200 Switches on page 27
AC Power Supply in EX4500 Switches
AC Power Supply in an EX8200 Switch
DC Power Supply in an EX8200 Switch
The switch must be installed in a rack or cabinet housed in a dry, clean, well-ventilated,
and temperature-controlled environment.
Guidelines
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
damages unshielded conductors and electronic devices.
To reduce or eliminate radio frequency interference (RFI) from
your site wiring, do the following:
Use 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.
If your site is susceptible to problems with electromagnetic
compatibility (EMC), particularly from lightning or radio
transmitters, seek expert advice.
Some of the problems caused by strong sources of
electromagnetic interference (EMI) are:
Destruction of the signal drivers and receivers in the switch
Electrical hazards as a result of power surges conducted
over the lines into the equipment
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