Table 18: Site Electrical Wiring Guidelines for the Services
Gateway (continued)
GuidelineSite Wiring Factor
To reduce or eliminate the emission of RFI from your site wiring:
•
Use twisted-pair cable with a good distribution of grounding
conductors.
•
Use a high-quality twisted-pair cable with one ground conductor
for each data signal when applicable, if you must exceed the
recommended distances.
Radio Frequency
Interference (RFI)
Provide a properly grounded and shielded environment and use
electrical surge-suppression devices.
Strong sources of electromagnetic interference (EMI) can cause
the following damage:
•
Destroy the signal drivers and receivers in the device
•
Conduct power surges over the lines into the equipment, resulting
in an electrical hazard
NOTE: If your site is susceptible to problems with EMC, particularly
from lightning or radio transmitters, you may want to seek expert
advice.
Electromagnetic
Compatibility (EMC)
CAUTION: To comply with intrabuilding lightning/surge requirements, the
intrabuilding wiring must be shielded. The shielding for the wiring must be
grounded at both ends.
Related
Documentation
SRX240 Services Gateway AC Power Specifications and Requirements on page 37•
• SRX240 Services Gateway Grounding Specifications on page 59
• SRX240 Services Gateway Power Supply on page 25
SRX240 Services Gateway Electrical and Power Requirements
There are factors you must consider while planning the electrical wiring and power
availability at your site. These factors include the following requirements:
•
Power specifications and requirements for the device
•
Electrical wiring guidelines for the device installation site
•
Power, connection, and power cord specifications for the device
•
Grounding guidelines and specifications for the device
Related
Documentation
General Site Guidelines for Installing the SRX240 Services Gateway on page 30•
Copyright © 2015, Juniper Networks, Inc.36
SRX240 Services Gateway Hardware Guide
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