NYY unarmoured 1kV power cable, single/m’core

NYY unarmoured 1kV power single or multicore cables have an especially tough sheath and are designed for fixed power and control use, primarily in industrial applications. Also known as NYY-J (including earth) and NYY-O (without earth) they can be used as an alternative to the old Delta Hi-tuf cables. 

Suitable for installation indoors, outdoors, in ducts, in water or underground where armour is not required.


Construction – NYY unarmoured 1kV power
solid or stranded plain copper conductors
polyvinylchloride (PVC) core insulation
cores twisted concentrically (in multicores only)
filling compound over the core assembly
black hardened PVC outer sheath


Technical – NYY unarmoured 1kV power
conductor make-up: class 1 (solid) or class 2 (non-flexible stranded)
– see Stranding/Resistance page
bend radius: single core = 15 x overall diameter
multicore = 12 x overall diameter
voltage rating: 600/1000V operating , 4000V test
current rating: as per NYY and NYCY chart, see Current Ratings page
temperature range: +5°C to +50°C flexible, -30°C to +70°C static
construction: generally to VDE 0276-603
flame retardant: according to IEC 60332-1, VDE 0482-332-1-2
core identification: single core = black or green/yellow inner insulation
2 cores = coloured to VDE 0293 without earth, see Colour Codes page
3 to 5 cores = coloured to VDE 0293 with earth (inc. in core count)
6+ cores = numbered black cores with earth (inc. in core count)


A printable specification is available here: NYY unarmoured 1kV power cable, single/multicore.


A similar cable with low smoke zero halogen sheathing can be found here: N2XH XLPE/LSOH 1kV

For similar screened or armoured cables return to the PVC Power & General Wiring 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.