RG coaxial (high-frequency coax)

RG coaxial (coax) cable is designed to carry high-frequency or broadband signals. Twin core, multicore and composite versions (with power cores) are available in some types.

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 PVC sheathed RG coaxial cables are suitable for internal or external use whereas the white PVC version is for internal use only. PE sheathing is for ducted applications, FEP sheathing is for high temperature use 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
RG6  1/1.02mm   RG142  1/0.94mm   RG214 7/0.75mm
RG11  7/0.40mm   RG174  7/0.16mm   RG223 1/0.90mm
RG58  19/0.18mm   RG178 7/0.10mm   RG316 7/0.17mm
RG59 1/0.69mm   RG179 7/0.10mm      
RG62 1/0.69mm RG213 7/0.75mm


Construction – RG coaxial
solid or stranded conductors, material varies
core insulation (dielectric) material varies
overall screen/s, material varies
outer sheath material varies


Technical – RG coaxial
conductor materials: copper (plain, tinned or silver plated)
or steel (copper clad or silver plated copper clad)
insulation (dialectric) materials: PE (solid, foamed or semi-solid) or PTFE
screen options: aluminium foil tape or aluminium wire braid (plain or opper plated)
or copper wire braid (plain, tinned or silver plated)
impedance (+/- 3Ω): 50Ω = RG58, RG142, RG174, RG178, RG213, RG214, RG223, RG316
75Ω = RG6, RG11, RG59, RG179
93Ω = RG62
temperature range: dependent on type, please check if critical


A printable PDF specification is available here: RG coaxial (high-frequency 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.