Highway Cables
Traffic Control Cable
British Standard Highway Cables
International Municipal Signal Association(IMSA Series)
National Motorway Communications System Specifications(TR Series)

National Motorway Communications System Specifications(TR Series)

TR2031- Loop Detector Feeder Cable

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 :

BS 6500

Cable Construction:

Non Armored TR2031 TRAFFIC CONTROL CABLE

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

Non Armored TR2031 TRAFFIC CONTROL CABLE

Technical Characteristics :

Rated voltage: 600/Kft volts

Minimum bending radius: 8 x Ø

Rated temperature: +70º C

Conductor resistance at 20°C: 1.5mm2---- 12.1ohms/km

2.5mm2---- 7.41ohms/km

Insulation resistance: >1500 MO x km

Loop inductance: 630µH/km(1P) 720µH/km(2P)

- Capacitance:

unarmored armored
1.5 mm2 2.5 mm2 1.5 mm2 2.5 mm2
<75 pF/m (1P) 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 (15ºC, 1.2ºC 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 0.70 - - 1.4 7.5 92
2 (Q) 1.5 1/1.38 0.70 - - 1.4 12 173
1 2.5 1/1.78 0.70 - - 1.4 8.1 121
2 (Q) 2.5 1/1.78 0.70 - - 1.4 13.3 231
Armored cables
1 1.5 1/1.38 0.70 0.7 0.9 1.4 10.6 255
2 (Q) 1.5 1/1.38 0.70 0.7 0.9 1.4 11.5 327
1 2.5 1/1.78 0.70 0.7 0.9 1.4 11.2 296
2 (Q) 2.5 1/1.78 0.70 0.7 0.9 1.4 12.3 395