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.

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

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

Cable Code	No. of Quads	Nominal Sheath Thickness mm			Nominal Overall Diameter mm	Nominal Weight kg/km
Cable Code	No. of Quads	Inner	Inter.	Outer	Nominal Overall Diameter mm	Nominal Weight kg/km
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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