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    MD4 Fire Resisting Telecom Cables (CR1-C1 Class)


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


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

    Cable Construction

    • Electrical Characteristics at 20℃Conductors: Solid copper conductor, 0.5mm 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.
    Nominal Conductor Diameter mm 0.8
    Nominal Cross Section Area mm 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℃ to +60℃ (during operation); -10℃ +60℃ (during installation)

    Dimensions and Weight

    Cable Code No. of
    Nominal Sheath Thickness
    Nominal Overall
    Nominal Weight
    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


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