Juniper EX4300 Series

Table 55: Site Electrical Wiring Guidelines
Site Wiring
Factor
Guidelines
Signaling
limitaons
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.
• Electromagnec pulses (EMPs) caused by lightning damage unshielded conductors and
electronic devices.
Radio
frequency
interference
To reduce or eliminate RFI from your site wiring, do the following:
• Use a twisted-pair cable with a good distribuon 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.
Electromagnet
ic
compability
If your site is suscepble to problems with electromagnec compability (EMC), parcularly
from lightning or radio transmiers, seek expert advice.
Strong sources of electromagnec interference (EMI) can cause:
• Destrucon of the signal drivers and receivers in the device,
• Electrical hazards as a result of power surges conducted over the lines into the equipment.
Rack Requirements
You can mount the device on two-post racks or four-post racks.
Rack requirements consist of:
• Rack type.
• Mounng bracket hole spacing.
• Rack size and strength.
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