MD4 Fire Resisting Telecom Cables (CR1-C1 Class)

 

Applications :

  • The cables are telecommunication cables for tunnel application. The cables are halogen free fi re resistant, inductive protected and armoured.

Standards :

  • Fire retardant: NBN C 30-004 F2
  • Fire resistant: NBN 713-020 Add.3. -RF 1h
 

 

Construction :

  • Conductors : Solid copper conductor, 0.5mm² nominal cross section area.
  • Insulation : Mica-tape + LSZH insulation.
  • Cabling Element : Four conductors are twisted to form a quad.
  • Stranding : Quads are helically stranded in concentric layers.
  • Core Wrapping : Plastic tape(s) with overlapping.
  • Inner Sheath : LSZH sheath.
  • Screen : Copper tape screen.
  • Intermediate Sheath : LSZH sheath.
  • Armour : Two layer of steel tape.
  • Outer Sheath : LSZH sheath.

Electrical Characteristics at 20 °C :

  • Nominal Conductor Diameter mm 0.8
    Nominal Cross Section Area mm2 0.5
    Nominal Insulation Thickness mm 0.5
    Maximum Conductor Resistance (DC) Ω/km 36.7
    Minimum Insulation Resistance MΩ.km 100
    Maximum Capacitance nF/km 120
    Voltage Test 2 mins KVac 0.5

Mechanical and Thermal Properties :

  • Minimum Bending Radius : 10×OD.
  • Temperature Range : -40°C to +60°C (during operation); -10°C +60°C (during installation).

Dimensions and Weight :

 

Cable Code No. of
Quads
Nominal Sheath Thickness
mm
Nominal Overall
Diameter
mm
Nominal Weight
kg/km
Inner Inter. Outer
0.8mm Conductor, 1.8mm Insulated Wire
RS/MD4-HH(K)HBH-7Q0.8-FR 7 1.0 1.0 1.8 30.7 1074

 

 

 

 
Anti Induction
Rated Voltage
Laid In Ducts
Buried in Ciround
 
Low Toxicity
Insulation Integrity FE180
EN 50200/IEC 60331
/NF C32-070-2.3(CR1)

 

 

Flame Retardant
NF C32-070-2.1(C2)
IEC 60332-1/EN 50265-2-1
Fire Retardant
NF C32-070-2.2(C1)
IEC 60332-3/EN50266
Zero Halogen
IEC 60754-1/NF C20-454
EN 50267-2-1
Low Smoke Emission
IEC 61034/NFC20-902
EN 50268/NF C32-073
Low Corrosivity
EN 50267-2-2/NF C32-074
IEC 60754-2/NF C20-453