B10) multicore 24awg overall foil+braid RS232+423

Alternatives to Belden these multicore 24awg overall foil+braid RS232+RS423 low capacitance data cables are designed to allow high data rates to run over long distances for RS232 & RS423 connections. This cable type is widely used in CAD/CAM applications and where low signal distortion is required.  The two layers of screening, first an overall foil tape then a tinned copper wire braid ensures excellent protection against electrical interference.

These alternatives to Belden cables are flexible and come in polyvinylchloride (PVC) or low smoke and fume (LSF) as standard.

LSF material offers reduced smoke emission / fire propagation compared with standard PVC but may still release hydrogen chloride (HCL) if burnt. There is no standard governing the HCL emissions of LSF cable. LSF should not to be confused with Low Smoke Zero Halogen (LSZH) which guarantees max. 0.5% HCL emissions, for more information please see the in-depth explanation shown on our LSZH Control Flex front page.

These cables are often available in Armoured, Duct Grade or LSZH versions on request, please contact us for more information.


Comparable Belden References
9925 3 Core 9932 7 Core 9936 15 Core
9927 4 Core 9933 8 Core 9937 25 Core
9929 5 Core 9934 9 Core 9938 37 Core
9931 6 Core 9935 10 Core


Construction – multicore 24awg overall foil+braid RS232+RS423
(9925, 9927, 9929, 9931, 9932, 9933, 9934, 9935, 9936, 9937, 9938)
stranded tinned copper conductors
foam polyolefin (PO) core insulation
cores twisted together
overall aluminium/polyester foil tape screen
tinned copper drain wire 
overall tinned copper wire braid (TCWB) screen
grey PVC or LSF outer sheath


Technical – multicore 24awg overall foil+braid RS232+RS423
(9925, 9927, 9929, 9931, 9932, 9933, 9934, 9935, 9936, 9937, 9938)
conductor make-up: stranded 7x 0.2mm, as AWG chart, see Stranding/Resistance page
voltage rating: 300V operating
capacitance: 40pF/m core/core, 72pF/m core/shield
temperature range: usually +60°C maximum, +80°C may be available on request
UL styles 2919
core identification: 3-10 cores = coloured to American data 1
15+ cores = coloured to American data 2
– see Colour Codes page


A printable PDF specification is available here: B10) multicore 24awg overall foil+braid RS232+RS423.


For alternative constructions return to the Alternatives to Belden Data Cables front page.

UL references and Belden numbers are provided for cross reference purposes only, please inform us if you require Belden manufacture or UL approved cables.


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.