Railway Cables

RAILSIG/RAILOPTICS/RAILDATA/RAILCOX Railway Telecom Cables

G7621 Trackside Communications Cables

Application

G7621 Trackside Communications Cables are designed for installation in trackside bracket runs and for use in

open locations (type1) or in tunnels or underground locations (type2).

Construction

Conductors： Solid plain copper, 0.63/0.9 mm nominal diameter.

Insulation： Cellular polyethylene.

Cabling Element： Two insulated conductors are twisted together to form a pair.

Core Wrapping： Non-hygroscopic plastic tape with overlapping.

Outer Sheath： PVC/LSZH sheath, coloured violet.

Core Identification：

1 Pair Cable: Blue/White

3 Pair Cable: Blue/White Orange/White Green/White

Reference Standards

LUL Spec G7621 A2 type 1 (for PVC sheath)

LUL Spec G7621 A2 type 2 (for LSZH sheath)

G7621 Trackside Communications Cables

Electrical Characteristics at 20℃

Nominal Conductor Diameter	mm	0.63	0.9
Maximum Conductor Resistance
Average Value	Ω/km	57.5	28
Individual Value	Ω/km	59	29
Minimum Insulation Resistance @500 V DC	MΩ.km	1500	1500
Maximum Average Mutual Capacitance	nF/km	59	59
Maximum Average Capacitance Unbalance
Pair to Pair	pF/460m	100	100
Pair to Earth	pF/460m	1200	1200

Mechanical and Thermal Properties

Minimum Bending Radius: 7.5×OD

Temperature Range: -30℃ to +70℃ (during operation);

-10℃ +55℃ (during installation)

Dimensions And Weight

Cable Code	No. of pairs	Nominal Thickness of Sheath mm	Nominal Overall Diameter mm	Nominal Weight kg/km
0.63mm Conductor, 1.15mm Insulated Wire
RS7621A2/T1-02YY-1P0.63	1	2.5	7.0	60
RS7621A2/T1-02YY-3P0.63	3	2.5	9.0	90
0.9mm Conductor, 1.5mm Insulated Wire
RS7621A2/T1-02YY-1P0.9	1	2.5	8.0	70
RS7621A2/T1-02YY-3P0.9	3	2.5	10.0	120

Note: The parameters listed above are nominal values as per cable standards. Actual values may vary due to material and manufacturing process variations. For precise specifications or customized requirements, please contact us for further information