Variations in Coaxial Cables
Last Updated: 01/31/2017
Coaxial cable is a two conductor cable consisting of a center conductor (usually copper; may be solid or stranded) surrounded by a foamed dielectric insulator, one or more layers of shielding and an overall outer jacket. The shielding, which may be a copper or aluminum braid and/or an aluminum foil, acts as a ground conductor and as a shield against interference.
RG59 - Standard analog audio/video, 75O radio frequency, Closed Circuit TV, HD CCTV
RG6 - Community Antenna Television, Closed Circuit TV, Master Antenna, Direct Broadcast Satellite, Broadband
RG11 - Community Antenna Television, HDTV, Closed Circuit TV, Master Antenna, Direct Broadcast Satellite, Broadband
Foil shielding, which provides 100% coverage, is effective against both EMI and RFI. Braided shielding works particularly well against EMI; RFI will be reduced with tight or high percentage braids. Foil and braid combinations offer the best overall shielding option.
RG11 provides a stronger signal, longer distance and lower loss than either RG59 or RG6.
Solid conductor is commonly used for permanent or stationary installations. Stranded conductor will hold up better to bending and is therefore often used in installations where the cable may be moved or flexed on an ongoing basis (i.e. pan/tilt security cameras).
To avoid shorts, care should be taken to ensure that the shielding does not come into contact with the center conductor when installing the connector.
Related industry Terms/Acronyms:
What does the “A” (B or C) after the RG numbers on my cable indicate?
Coaxial cable usually follows a standard abbreviation nomenclature such as RG6/U where RG is Radio Guide, 6 is the approval number and U indicates a universal spec. When an additional letter follows the approval number it indicates a revision. In this case RG6A/U would supersede RG6/U.