In the summer of 2021, the name of the product FTMSU Cca will change to FTMSU C-Proof.

FTMSU is C-Proof! This means that it meets the requirements of the Cca fire class. Read more about C-Proof cables!

This type is also known as J-V(ZN)H (VDE 0888). 


  • Optical fibres: Single-mode fibres according to the ITU-T G.657.A1. Fibres meet also the requirements of ITU-T G.652.D.
  • Secondary coating: Tight buffer, outer diameter 900 μm.
  • Strength members: Glass yarns with water-blocking coating under the sheath.
  • Outer sheath: Flame retardant, halogen free and UV resistant plastic (LSZH). Colour of the sheath is light grey RAL 7035. Nominal sheath thickness of the original version is 1,0 mm and nominal sheath thickness of the upgraded version is 1,4 mm. Cable is flame retardant according to the IEC 60332-1-2 and IEC 60332-3.
  • Sheath marking: Marking printed on the sheath at one meter interval: Nestor Cables - cable type - year of manufacture - length marking. 

All of our fibre optic and copper cables are halogen-free.

STK* Nestor code Size Diameter Weight Length Drum
0217473 L11048


6,2 mm 41 kg/km 2000 m P6
0217474 L11049


6,2 mm 41 kg/km 500 m P6
0217475 L11050 12xG.657.A1 8,0 mm 65 kg/km 2000 m P8


*Clicking on these numbers will take you to the product page on the Finnish STK service.

FTMSU C-Proof  

Max. tension during installation, 4 fibres

500 N

Max. tension during installation, 12 fibres

1000 N

Crush strength with 100 mm plate

2000 N

Temperature range during operation

-45 - +60 °C

Temperature range during installation

-15 - +60 °C

Reaction to fire (CPR)

Cca -s1b,d0,a1

Minimum bending radius

Installed 10 x diameter, during installation 20 x diameter