Electromagnetic Compatibility; Dc Power Electrical Safety Guidelines And Warnings - Juniper T4000 Hardware Manual

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DC Power Electrical Safety Guidelines and Warnings

Copyright © 2013, Juniper Networks, Inc.
If you must exceed the recommended distances, use a high-quality twisted-pair cable
with one ground conductor for each data signal when applicable.

Electromagnetic Compatibility

If your site is susceptible to problems with electromagnetic compatibility (EMC),
particularly from lightning or radio transmitters, you might want to seek expert advice.
Strong sources of electromagnetic interference (EMI) can destroy the signal drivers and
receivers in the network device and conduct power surges over the lines into the
equipment, resulting in an electrical hazard. It is particularly important to provide a properly
grounded and shielded environment and to use electrical surge-suppression devices.
CAUTION: To comply with intrabuilding lightning and surge requirements,
intrabuilding wiring must be shielded, and the shield for the wiring must be
grounded at both ends.
WARNING: The intrabuilding port(s) of the equipment or subassembly is
suitable for connection to intrabuilding or unexposed wiring or cabling only.
The intrabuilding port(s) of the equipment or subassembly MUST NOT be
metallically connected to interfaces that connect to the OSP or its wiring.
These interfaces are designed for use as intrabuilding interfaces only (Type
2 or Type 4 ports as described in GR-1089-CORE, Issue 4) and require isolation
from the exposed OSP cabling. The addition of primary protectors is not
sufficient protection in order to connect these interfaces metallically to OSP
wiring.
General Electrical Safety Guidelines and Electrical Codes for Juniper Networks Devices
T4000 DC Power Electrical Safety Guidelines on page 320
DC Power Electrical Safety Warnings for Juniper Networks Devices on page 321
Appendix A: Router Safety and Regulatory Compliance Information
319