NYM installation cable, single or multicore

NYM installation cable is designed for wiring inside buildings, available in single or multicore versions with grey PVC sheathing. Suitable for use in dry, damp or wet areas and can be installed in, on or under plaster, brickwork or concrete.

Not suitable for laying in shaken, vibrated or compressed concrete, for outdoor use only if protected against direct sunlight. LSZH (low smoke zero halogen) for increased fire safety and screened (N)YM(St) versions may be available on request. 


Construction – NYM installation cable
solid or stranded plain copper conductors
polyvinylchloride (PVC) core insulation
cores stranded in layers with inner sheath
grey special PVC (TM1) outer sheath


Technical – NYM installation cable
conductor make-up: class 1 (solid) or class 2 (non-flexible stranded)
– see Stranding/Resistance page
bend radius: 6 x overall diameter
voltage rating: 300V/500V operating, 2000V test
current rating: see NYM & (N)YM(St) chart 
temperature range: 0°C to +70°C operating
construction: generally according to VDE0250 T.204
flame retardant: according to EN 50265-2-1, IEC 60332-1
core identification: 2 cores = coloured to VDE 0293 without earth (green/yellow)
3+ cores = coloured to VDE 0293 with earth (inc. in core count)
– see Colour Codes page


A printable specification is available here: NYM installation cable, single or multicore.


For other power or wiring cables return to the PVC Power & General Wiring Cables front page.

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.


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.