Juniper EX Series

Table 27: AC Power Supply Electrical Specifications for an EX-series Switch (continued)
SpecificationItem
■
4 A (for EX 3200-24T, EX 4200-24T, EX 3200-48T, EX 4200-48T, and EX
4200-24F
■
7 A (for EX 3200-24P and EX 4200-24P
■
12 A (for EX 3200-48P and EX 4200-48P
AC system current rating
Related Topics ■ AC Power, Connection, and Power Cord Specifications on page 56
■ Power Supply in EX 3200 and EX 4200 Switches on page 27
■ General Safety Guidelines and Warnings on page 130
■ General Electrical Safety Guidelines on page 153
Site Electrical Wiring Guidelines
Table 28 on page 55 describes the factors you must consider while planning the
electrical wiring at your site.
CAUTION: It is particularly important to provide a properly grounded and shielded
environment and to use electrical surge-suppression devices.
To comply with intrabuilding lightning/surge requirements, intrabuilding wiring must
be shielded and the shield for the wiring must be grounded at both ends.
Table 28: Site Electrical Wiring Guidelines
GuidelinesSite Wiring Factor
If your site has experienced any of the following problems,
consult experts in electrical surge suppression and shielding:
■
Improperly installed wires emitted radio interference.
■
Damage from lightning strikes occurred when wires
exceeded recommended distances or passed between
buildings.
■
Damage to unshielded conductors and electronic devices
was caused by the electromagnetic pulse (EMP) caused
by lightning.
Signaling limitations
To reduce or eliminate the emission of radio frequency
interference (RFI) from your site wiring, do the following:
■
Use 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.
Radio frequency interference (RFI)
Site Electrical Wiring Guidelines ■ 55
Chapter 2: Preparing the Site for Switch Installation