Application and Description:


TR2031 loop detector feeder cable is a copper communications cable sheathed with medium density polyethyylene (MDPE) designed for installation in a ducted network. Armoured feeder cables are used to feed electrical current to inductive cable loops and designed for direct burial underground.


Standard and Approval:


BS 6500


Cable Construction:


                                               Non Armored TR2031
- Conductor: Solid plain annealed copper, comply with IEC 60228 for Class 1
- Insulation: Polythene (PE), comply with IEC 60708
- Core Identification: 1 pair – red, black
      2 pair – red, yellow, blue, black laid up in quad formation in order of rotation
- Screen (for Non Armoured Cable Only)): Aluminum polymer laminate tape comply with IEC 60708
- Inner Sheath (for Armoured Cable Only): Medium density polyethylene (MDPE), comply with IEC 60708


- Armor (for Armoured Cable Only): Galvanized steel wires to BS EN 10257-1
- Outer Sheath: Medium density polyethylene (MDPE), comply with IEC 60708. 
- Outer Sheath Color: Orange/Black
                                                       Armored TR2031


Technical Characteristics:


- Rated voltage: 600/Kft volts
- Minimum bending radius: 8 x ?
- Rated temperature: +70? C
- Conductor resistance at 20°C: 1.5mm2---- 12.1ohms/km
          2.5mm2---- 7.41ohms/km
- Insulation resistance: >1500 MΩ x km
- Loop inductance: 630?H/km(1P)  720?H/km(2P)
- Capacitance: 
unarmored armored
1.5 mm2 2.5 mm2 1.5 mm2 2.5 mm2
<75 pF/m 39 pF/m (1P) <75 pF/m 64 pF/m (1P)
52 pF/m (2P) 53.5 pF/m (2P)




-Current rating:
Unarmored in air (30°C) armored in ground (15?C, 1.2?C m/W)
1.5 mm2 2.5 mm2 1.5 mm2 2.5 mm2
24* 33* 32* 41*


*These ratings are based on only two cores loaded simultaneously. In two pair cables where all four cores could be loaded simultaneously, the above values should be multiplied by 0.78.


Cable Parameter:


Number
of
Pairs Nominal
Conductor
Area Nominal
Conductor
Stranding Insulation
Thickness Inner Sheath
Thickness Nominal 
diameter of 
armour wire Outer Sheath
Thickness Nominal
O/D Approx
Cable
Weight
mm2 NO./mm mm mm mm mm mm Kg/km
Unarmored cables
1 1.5 1/1.38 0.60 0.7 - 1.4 9.0 67
2 (Q) 1.5 1/1.38 0.60 0.7 - 1.4 10.2 118
1 2.5 1/1.78 0.70 0.7 - 1.4 10.4 99
2 (Q) 2.5 1/1.78 0.70 0.7 - 1.4 11.8 166
Armored cables
1 1.5 1/1.38 0.60 0.7 0.9 1.4 11.9 265
2 (Q) 1.5 1/1.38 0.60 0.7 0.9 1.4 13.2 335
1 2.5 1/1.78 0.70 0.7 0.9 1.4 12.7 336
2 (Q) 2.5 1/1.78 0.70 0.7 0.9 1.4 14.1 375