Site Electrical Wiring Guidelines; Table 18: Site Electrical Wiring Guidelines - Juniper EX2200 Series Hardware Manual

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Site Electrical Wiring Guidelines

Table 18: Site Electrical Wiring Guidelines

Site Wiring Factor
Signaling limitations
Copyright © 2011, 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 ESD prevention procedures to avoid 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 180
Environmental Requirements and Specifications for EX Series Switches on page 54
Environmental Requirements and Specifications for a QFXC08 Chassis
This topic applies to hardware devices in the EX Series product family, which includes
switches and the XRE200 External Routing Engine.
This topic also applies to hardware devices in the QFX Series.
Table 18 on page 53 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.
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.
Chapter 4: Site Preparation
53