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 |