Site Electrical Wiring Guidelines; Table 21: Site Electrical Wiring Guidelines - Juniper OCX1100 Hardware Manual

OCX1100 Switch Hardware Guide

Site Electrical Wiring Guidelines

Documentation

Table 21 on page 34

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.

Site Wiring Factor

Signaling limitations

Radio frequency interference

Electromagnetic compatibility

General Safety Guidelines and Warnings on page 137

General Electrical Safety Guidelines and Warnings on page 165

Prevention of Electrostatic Discharge Damage on page 167

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.

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.

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

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