G7621 Trackside Communications Cables

Application

The cables are designed for installation in trackside bracket runs and for use in open locations (type1) or in tunnels or underground locations (type2).

 

Standards

• LUL Spec G7621 A2 type 1 (for PVC sheath)
• LUL Spec G7621 A2 type 2 (for LSZH sheath)

 

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

 

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