Site Electrical Wiring Guidelines For J-Ex Series Switches - Dell PowerConnect J-EX8216 Hardware Manual

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Site Electrical Wiring Guidelines for J-EX Series Switches

Table 31: Site Electrical Wiring Guidelines
Site Wiring Factor
Signaling limitations
Radio frequency interference
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 switch in a secure area, so that only authorized personnel can access the
switch.
Prevention of Electrostatic Discharge Damage on J-EX Series Switches on page 230
Clearance Requirements for Airflow and Hardware Maintenance for a J-EX8216 Switch
on page 73
Environmental Requirements and Specifications for J-EX Series Switches on page 66
Table 31 on page 65 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.
To reduce or eliminate 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.
Chapter 4: Site Preparation
65