Tx Matrix Plus Site Electrical Wiring Guidelines; Distance Limitations For Signaling; Radio Frequency Interference; Electromagnetic Compatibility - Juniper TX MATRIX PLUS Hardware Manual

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TX Matrix Plus Site Electrical Wiring Guidelines

Distance Limitations for Signaling

Radio Frequency Interference

Electromagnetic Compatibility

Copyright © 2010, Juniper Networks, Inc.
Appendix D: TX Matrix Plus Power Requirements, Guidelines, and Specifications

Table 64: Grounding Cable Specifications

Cable Type Quantity and Specification
Grounding One 4-AWG (21.2 mm
conductor, or as required by local code.
CAUTION: Before TX Matrix Plus router installation begins, a licensed
electrician must attach a cable lug to the grounding and power cables that
you supply. A cable with an incorrectly attached lug can damage the TX
Matrix Plus router (for example, by causing a short circuit).
TX Matrix Plus Switch-Fabric Chassis Description on page 8
Grounding the TX Matrix Plus Router on page 166
When planning the electrical wiring at your site, consider the factors discussed in the
following sections.
Distance Limitations for Signaling on page 441
Radio Frequency Interference on page 441
Electromagnetic Compatibility on page 441
Improperly installed wires can emit radio interference. In addition, the potential for damage
from lightning strikes increases if wires exceed recommended distances, or if wires pass
between buildings. The electromagnetic pulse (EMP) caused by lightning can damage
unshielded conductors and destroy electronic devices. If your site has previously
experienced such problems, you might want to consult experts in electrical surge
suppression and shielding.
You can reduce or eliminate the emission of radio frequency interference (RFI) from your
site wiring by using 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, you might want to seek expert advice.
Connector Specification
2
) copper Cable lug; dual hole.
Bottom pair: sized to fit M6
grounding studs.
Top pair: sized to fit 1/4-20 UNC
grounding studs.
441