Juniper EX4500 Series User Manual

Table 19: Site Electrical Wiring Guidelines (continued)
GuidelinesSite Wiring Factor
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.
Radio frequency interference
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
Electromagnetic compatibility
Related Topics ■ General Safety Guidelines and Warnings for EX Series Switches on page 145
■ General Electrical Safety Guidelines and Warnings for EX Series Switches on
page 173
■ Prevention of Electrostatic Discharge Damage on EX Series Switches on page 174
■ Power Supply in EX2200 Switches
■ Power Supply in EX3200 and EX4200 Switches
■ AC Power Supply in EX4500 Switches on page 18
■ AC Power Supply in an EX8200 Switch
■ DC Power Supply in an EX8200 Switch
Environmental Requirements and Specifications for EX Series Switches
The switch must be installed in a rack or cabinet housed in a dry, clean,
well-ventilated, and temperature-controlled environment.
Ensure that these environmental guidelines are followed:
■ The site must be as dust-free as possible, because dust can clog air intake vents
and filters, reducing the efficiency of the switch cooling system.
■ Maintain ambient airflow for normal switch operation. If the airflow is blocked
or restricted, or if the intake air is too warm, the switch might overheat, leading
to the switch temperature monitor shutting down the switch to protect the
hardware components.
46 ■ Environmental Requirements and Specifications for EX Series Switches
Complete Hardware Guide for EX4500 Ethernet Switches

Juniper EX4500 Series Specifications

General

Brand	Juniper
Model	EX4500 Series
Category	Switch
Language	English