SY JB/OB armoured PVC control cable, coloured

SY JB/OB armoured control cable has colour coded cores and a bedded galvanised steel wire braid (GSWB) which provides excellent protection against mechanical damage.

These flexible and versatile SY JB/OB cables are used for  connecting, measuring, checking and control applications.

Suitable for installation in dry and moist rooms, outdoor installation not recommended.

If protection against mechanical (physical) damage is not required please see our range of YY control cables. If protection against electrical interference is required please see our range of CY screened control cables.


Construction – SY JB/OB
stranded plain copper conductors
polyvinylchloride (PVC) core insulation
grey PVC bedding
galvanised steel wire braid (GSWB) armour
clear oil resistant PVC outer sheath


Technical – SY JB/OB
conductor make-up: class 5 (flexible fine stranded), see Stranding/Resistance page
bend radius: 6 x overall diameter (O/D) fixed, 20 x O/D flexing
voltage rating: 300/500V operating, 2000V test
current rating: as per YY, CY or SY style cables chart, see Current Ratings page
temperature range: -5°C to +70°C flexible, -40°C to +80°C static
max. +70°C at conductor
construction: generally according to BS6500 & VDE0250
flame retardant: according to IEC 60332-1
oil resistant: according to EN 50525-2-11
core identification: OB, usually 2 core = coloured to VDE 0293 without earth (green/yellow)
JB, 3-5 cores = coloured to VDE0293 with earth (inc. in core count)
JB, 6+ cores = coloured to JB Chart with earth (inc. in core count)
– see Colour Codes page


A printable PDF specification is available here: SY JB/OB armoured PVC control cable, coloured cores.


A similar cable with black low smoke zero halogen (LSZH) sheathing and numbered cores can be found here: SY LSZH

For alternative constructions (colours, braiding, etc.) return to the PVC Control Flex 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.