CT coaxial (satellite-television coax)

CT coaxial (coax) cable is designed to transmit satellite, CCTV, television and video signals. The term CT was a originally a manufacturers brand name for satellite coaxial cable, that company is no longer in business but many people continue to use the reference. Alternative references include ST, DT, TV, MF, WF and many more. 

Coax cable is called “coaxial” because it includes one physical channel (inner conductor) that carries the signal surrounded by another concentric physical channel (braid screen), both running along the same axis. The two channels are separated by a precisely measured tubular insulating layer (dielectric) to achieve constant conductor spacing.

Black sheathed cables are suitable for internal or external use, white sheathed cables are suitable for internal use only. Duct Grade (thick PE) sheathed cables are suitable for use in ducts and LSZH sheathed cables provide increased safety in the case of fire.

Note: low smoke zero halogen / halogen free (LSZH, LSOH, LSHF, OHLS) should not be confused with LSF (low smoke and fume), an in-depth explanation is shown on our LSZH Control Flex front page.


References & Sizes
CT100 CT125 CT165 CT167 CT233
 1/1.00mm 1/1.25mm 1/1.65mm 1/1.67mm  1/2.33mm
1, 2 or 5 core 1 or 5 core single core single core single core


Construction – CT coaxial
solid plain copper conductors
air-spaced or foamed PE (polyethylene) core insulation (dielectric)
copper foil & plain copper braid screens
PVC (polyvinylchloride), PE or LSZH (low smoke zero halogen) sheath


Technical – CT coaxial
impedance: 75 Ohms (+/- 3 Ω)
temperature range: dependent on type, please check if critical


A printable PDF specification is available here: CT coaxial (satellite and television coax) cable.


For more coaxial cables return to the Coaxial and Telephone front page.


All measurements should be considered nominal and images for illustration purposes only. Although Central Cables Ltd has made every reasonable effort to ensure its accuracy, the information contained herein is subject to error or omission and to change without notice. In no event will Central Cables Ltd be liable for any damages whatsoever, arising in connection with the information described.