Installation guide

Planning and Designing RIO Cable System
890 USE 101 00 October 2006 47
EMI/RFI Considerations in a Coaxial Cable Routing Plan
Overview Electromagnetic interference (EMI) and radio frequency interference (RFI) sources
can be avoided by using effectively shielded cable and by using the cable away from
troublesome locations.
Guidelines for
Interference
Avoidance
z Avoid installation of RIO cables in trays or conduits that contain AC or DC power
cable or power services
z Separate RIO cable from power cable or power sources; trunk cable runs should
avoid panels, trays, and other enclosures that contain power wires.
z Make sure that any RIO cable power cable crossings are at right angles only
z Do not route trunk cable into equipment cabinets or panels—trunk cable and taps
should be mounted away from cabinets or panels in a separate enclosure (One
satisfactory method is to install the trunk cable in the ceiling of the facility and
mount the taps within an enclosure up in the ceiling. The drop cable can then be
installed down to the node.)
z Do not exceed the cable’s minimum bend radius and pull strength
z Install cable in steel conduit in high noise environments
Note: We recommend that a spacing of 12 ... 14 in./kV of power be maintained
between the RIO cable installation and power cables.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com