Juniper EX9208 Hardware Guide

Site Electrical Wiring Guidelines
This topic applies to hardware devices in the EX Series product family, which includes
EX Series 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, to OCX1100 switches, and
to NFX250 devices.
Table38 on page 86 describes the factorsyou 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 38: Site Electrical Wiring Guidelines
GuidelinesSite Wiring Factor
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 occurswhen wires exceed recommended
distances or pass between buildings.
•
Electromagnetic pulses (EMPs) caused by lightning damage unshielded
conductors and electronic devices.
Signaling limitations
To reduce or eliminate RFI from your site 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 cablewith 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
Documentation
General Safety Guidelines and Warnings on page 317•
• General Electrical Safety Guidelines and Warnings on page 349
• Prevention of Electrostatic Discharge Damage on page 351
Copyright © 2017, Juniper Networks, Inc.86
EX9208 Switch Hardware Guide

Juniper EX9208 Specifications

General

Brand	Juniper
Model	EX9208
Category	Switch
Language	English