YY JB/OB grey PVC control cable, coloured

YY JB/OB grey control cable is designed for connecting, measuring, checking and control applications.

These flexible and versatile YY JB/OB cables with colour coded cores work well in environments with only light mechanical stress. 

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

If protection against electrical interference is required please see our range of CY screened control cables, If protection against mechanical damage is required please see our range of SY armoured control cables.


Construction – YY JB/OB grey
stranded plain copper conductors
polyvinylchloride (PVC) core insulation
grey oil resistant PVC outer sheath


Technical- YY JB/OB grey
conductor make-up: class 5 (flexible fine stranded), see Stranding/Resistance page
bend radius: 4 x overall diameter (O/D) fixed, 15 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: -15°C to +80°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:  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: YY JB/OB grey PVC flexible control cable, coloured cores.


Similar cables can be found elsewhere on our site as listed below.

Low smoke zero halogen sheathed version (cores number coded): YY LSZH

Smaller conductor sizes (cores coloured to DIN47100): LIYY

Highly flexible version (cores number coded): EF YY

Polyurethane sheathed version (cores number coded): PUR JZ/OZ

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.