Site Electrical Wiring Guidelines - Juniper QFX5230-64CD Hardware Manual

• Leave at least 24 in. (61 cm) both in front of and behind the QFX5230-64CD. For service personnel
to remove and install hardware components, you must leave adequate space at the front and back of
the switch. NEBS GR-63 recommends that you allow at least 30 in. (76.2 cm) in front of the rack or
cabinet and 24 in. (61 cm) behind the rack or cabinet.

Site Electrical Wiring Guidelines

Table 20 on page 46 describes the factors you must consider while planning the electrical wiring at
your site.
WARNING: You must provide a properly grounded and shielded environment and use
electrical surge-suppression devices.
Avertissement Vous devez établir un environnement protégé et convenablement mis à
la terre et utiliser des dispositifs de parasurtension.
Table 20: Site Electrical Wiring Guidelines
Site Wiring Guidelines
Factor
Signaling If your site experiences any of the following problems, consult experts in electrical surge
limitations 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.
Radio To reduce or eliminate RFI from your site wiring, do the following:
frequency
•
Use a twisted-pair cable with a good distribution of grounding conductors.
interference
•
If you must exceed the recommended distances, use a high-quality twisted-pair cable with
one ground conductor for each data signal, when applicable.
46