General Site Guidelines; Site Electrical Wiring Guidelines; Preparation Overview; Table 22: Site Electrical Wiring Guidelines - Juniper QFX5100 Hardware Manual

General Site Guidelines

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Site Electrical Wiring Guidelines

Copyright © 2016, Juniper Networks, Inc.
Efficient device operation requires proper site planning and maintenance and proper
layout of the equipment, rack or cabinet (if used), and wiring closet.
To plan and create an acceptable operating environment for your device and prevent
environmentally caused equipment failures:
Keep the area around the chassis free from dust and conductive material, such as
metal flakes.
Follow prescribed airflow guidelines to ensure that the cooling system functions properly
and that exhaust from other equipment does not blow into the intake vents of the
device.
Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent
damaging the equipment. Static discharge can cause components to fail completely
or intermittently over time.
Install the device in a secure area, so that only authorized personnel can access the
device.
Prevention of Electrostatic Discharge Damage on page 263
Table 22 on page 69 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 22: Site Electrical Wiring Guidelines

Site Wiring Factor
Signaling limitations
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 damage
unshielded conductors and electronic devices.
Chapter 6: Preparation Overview
69