Juniper EX9214 Hardware Manual
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Brand: Juniper
Category: Network Router , Switch
Type: Hardware manual for Juniper EX9214
Pages: 372
Table 39: Site Electrical Wiring Guidelines (continued)
GuidelinesSite Wiring Factor
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 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 device
•
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 299•
• General Electrical Safety Guidelines and Warnings on page 327
• Prevention of Electrostatic Discharge Damage on page 329
Rack Requirements
You can mount the device on two-post racks or four-post racks.
Rack requirements consist of:
•
Rack type
•
Mounting bracket hole spacing
•
Rack size and strength
•
Rack connection to the building structure
Table 40 on page 90 provides the rack requirements and specifications.
Table 40: Rack Requirements and Specifications
GuidelinesRack Requirement
You can mount the device on a rack that provides bracket holes or hole patterns spaced
at 1 U (1.75 in. or 4.45 cm) increments and meets the size and strength requirements to
support the weight.
A U is the standard rack unit defined by the Electronics Industry Association.
Rack type
The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the
device can be mounted in any rack that provides holes spaced at that distance.
Mounting bracket hole spacing
Copyright © 2017, Juniper Networks, Inc.90
EX9214 Switch Hardware Guide