RT/ZHLS, A2Y(L)2Y External Telephone Cables to NR/PS/TEL/00015
Application
The cables are designed primarily for trackside railway installation in non electrifi ed area. For direct burial application, brass tape armoured or Zetabon type corrugated steel tape armoured can be offered against rodent attack.
Standards
 NR/PS/TEL/00015 (formerly RT/E/PS/00015 or GK/RT 0315)
 TS0886/BR1822
 BR892
Construction
 Conductors: Solid plain copper conductor, 0.63 or 0.9 mm nominal diameter.
 Insulation: Solid polyethylene to BS 6234.
 Cabling Element: Two insulated conductors are twisted together to form a pair.
 Stranding: Pairs are helically stranded in 10 pair units.
 Core Wrapping: Plastic tape(s) with overlapping.
 Moisture Barrier: One laminated sheath made of aluminium tape (0.15mm) coated with PECopolymer on at least one side is applied with longitudinally overlap.
 Outer Sheath: Polyethylene to BS 6234. LSZH compound option can be offered upon request.
Optional
 Jelly Filled Cables: The cable core interstices are fi lled with petroleum jelly to avoid longitudinal water penetration within the cable. The water resistant filling compound is applied to the air space between nonhygroscopic tape and shield, shield and sheath within the cable core.
 Armoured Cables: Corrugated steel tape armour coated on both sides with copolymer can be applied over an intermediate sheath. The steel tape thickness is 0.145mm. Brass tape armour can be offered as an option.
Electrical Characteristics at 20℃
Nominal Conductor Diameter  mm  0.63  0.9 
Maximum Conductor Resistance  Ω/km  60.0  30.0 
Minimum Insulation Resistance @500 V DC (1min)  MΩ.km  1500  1500 
Maximum Conductor Capacitance @1000Hz (AC)  
Maximum Average Value  
For 20 pairs or less  nF/km  70  79 
More than 20 pairs  nF/km  67  75 
Maximum Individual Value 99% of pairs  
Up to 20 pairs  nF/km  79.0  85.0 
More than 20 pairs  nF/km  75.0  81.0 
Maximum Capacitance Unbalance @1000Hz pair to pair (99% of pairs)  
For 2 pairs (1 quad)  pF/500m  800  800 
All other sizes  pF/500m  275  275 
Dielectric Strength, conductor to screen (DC voltage 2mins)  V  2000  2000 
Maximum Average Attenuation  
@1.0KHz  dB/km  1.40  0.95 
@2.4KHz  dB/km  2.15  1.46 
@1.024MHz  dB/km  18.70  14.6 
Minimum Average Nearend Crosstalk  
@1.0KHz  dB/km  70  70 
@2.4KHz  dB/km  65  65 
@1.024MHz  
Within Units  dB/km  40  40 
Between Units  dB/km  47  47 
High Voltage Breakdown Test  
DC for 2mins  V  2000  2000 
AC for 2mins  V  1333  1333 
Mechanical and Thermal Properties
 Minimum Bending Radius: 7.5×OD (unarmoured); 10×OD (armoured)
 Temperature Range: 40℃ to +70℃ (during operation); 10℃ +60℃ (during installation)
Core Identification
Dimensions and Weight
A2Y(L)2Y n×2×0.63/0.9
Cable Code  Number of Pairs (n) 
Nominal Sheath Thickness mm 
Maximum Overall Diameter mm 
Nominal Weight kg/km 
0.63mm Conductor, 1.15mm Insulated Wire  
RS/RT/ZHLS2Y(L)2Y2P0.63  2  2.7  12.3  103 
RS/RT/ZHLS2Y(L)2Y5P0.63  5  2.7  13.8  155 
RS/RT/ZHLS2Y(L)2Y10P0.63  10  2.7  15.6  212 
RS/RT/ZHLS2Y(L)2Y20P0.63  20  2.7  18.1  309 
RS/RT/ZHLS2Y(L)2Y30P0.63  30  2.7  20.4  403 
RS/RT/ZHLS2Y(L)2Y50P0.63  50  2.7  24.2  574 
RS/RT/ZHLS2Y(L)2Y75P0.63  75  2.7  28.2  779 
RS/RT/ZHLS2Y(L)2Y100P0.63  100  2.7  31.0  974 
0.9mm Conductor, 1.5mm Insulated Wire  
RS/RT/ZHLS2Y(L)2Y2P0.9  2  2.7  13.3  131 
RS/RT/ZHLS2Y(L)2Y5P0.9  5  2.7  15.6  208 
RS/RT/ZHLS2Y(L)2Y10P0.9  10  2.7  18.1  305 
RS/RT/ZHLS2Y(L)2Y20P0.9  20  2.7  21.9  477 
RS/RT/ZHLS2Y(L)2Y30P0.9  30  2.7  25.2  639 
RS/RT/ZHLS2Y(L)2Y50P0.9  50  2.7  30.0  951 
RS/RT/ZHLS2Y(L)2Y75P0.9  75  2.7  35.8  1325 
RS/RT/ZHLS2Y(L)2Y100P0.9  100  2.7  39.1  1688 
A2Y(F)(L)2YB2Y n×2×0.63/0.9 Jelly Filled & Armoured Cables
Cable Code  Number of Pairs (n) 
Nominal Sheath Thickness mm 
Maximum Overall Diameter mm 
Nominal Weight kg/km 

Inner  Outer  
0.63mm Conductor, 1.15mm Insulated Wire  
RS/RT/ZHLS2Y(F)(L)2YB2Y2P0.63  2  1.6  1.6  18.0  222 
RS/RT/ZHLS2Y(F)(L)2YB2Y5P0.63  5  1.6  1.6  19.5  296 
RS/RT/ZHLS2Y(F)(L)2YB2Y10P0.63  10  1.6  1.6  20.3  383 
RS/RT/ZHLS2Y(F)(L)2YB2Y20P0.63  20  1.6  1.6  23.8  504 
RS/RT/ZHLS2Y(F)(L)2YB2Y30P0.63  30  1.6  1.6  26.1  606 
RS/RT/ZHLS2Y(F)(L)2YB2Y50P0.63  50  1.6  1.6  29.9  903 
RS/RT/ZHLS2Y(F)(L)2YB2Y75P0.63  75  1.6  1.6  33.9  1202 
RS/RT/ZHLS2Y(F)(L)2YB2Y100P0.63  100  1.6  1.6  36.7  1463 
0.9mm Conductor, 1.5mm Insulated Wire  
RS/RT/ZHLS2Y(F)(L)2YB2Y2P0.9  2  1.6  1.6  19.0  250 
RS/RT/ZHLS2Y(F)(L)2YB2Y5P0.9  5  1.6  1.6  21.3  370 
RS/RT/ZHLS2Y(F)(L)2YB2Y10P0.9  10  1.6  1.6  23.8  508 
RS/RT/ZHLS2Y(F)(L)2YB2Y20P0.9  20  1.6  1.6  27.6  782 
RS/RT/ZHLS2Y(F)(L)2YB2Y30P0.9  30  1.6  1.6  30.9  1000 
RS/RT/ZHLS2Y(F)(L)2YB2Y50P0.9  50  1.6  1.6  35.7  1402 
RS/RT/ZHLS2Y(F)(L)2YB2Y75P0.9  75  1.6  1.6  41.5  2055 
RS/RT/ZHLS2Y(F)(L)2YB2Y100P0.9  100  1.6  1.6  44.8  2550 