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

British Standard Highway Cables

Loop Feeder Cable to BS6346

Application and Description :

Loop Feeder Cable is used to connect traffic lights to the central control management system. The cables come in

armoured, for direct burial, or unarmoured for applications where additional mechanical protection has been

afforded by other means such as ducting. The Loop feeder cables are supplied in a highly visible orange for easy

location of buried services. These cables are also suitable for use in small power, lighting or control circuits.

Standard and Approval:

BS 6346, BS 6360, BS 6234

Cable Construction:

Loop Feeder Cable to BS6346

Conductor: Conductor: Solid plain annealed copper, comply with BS 6360, Class 1

Insulation: Polythene (PE), comply with BS 6234, type 03

Pairing: Two insulated conductors twisted together, four cores laid up as a quad

Bedding (for Armoured Cable Only): Polythene (PE), comply with BS 6234, type 03

Armor (for Armoured Cable Only): Galvanized steel wires

Sheath: Polythene (PE), comply with BS 6234, type 03

Sheath Colour: Orange

Loop Feeder Cable to BS6346

Core Identification :

1 pair – red, black

2 pair –red, yellow, blue, black laid up in quad formation in order of rotation:

Technical Characteristics:

Rated voltage: 600/Kft volts

Conductor Resistance: at 20°C: 12.1ohms/km(1.5mm2)

7.41 ohms/km(2.5mm2)

Minimum bending radius: 7.5 x Ø

Temperature range: -20º C - +70º C

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) <75 pF/m 64 pF/m (1P)
52 pF/m (2P) 53.5 pF/m (2P)

Cable Parameter :

Number of Cores Nominal Conductor Area Nominal Conductor Stranding Insulation Thickness Bedding Thickness Nominal diameter of armour wire Sheath Thickness Nominal O/D Approx Cable Weight
　 mm2 NO./mm mm mm mm mm mm Kg/km
Non armored cables
2 (1pr) 1.5 1/1.38 0.64 - - 1.3 9.0 80
4 (2pr) 1.5 1/1.38 0.64 - - 1.3 9.1 123
2 (1pr) 2.5 1/1.78 0.74 - - 1.4 9.3 110
4 (2pr) 2.5 1/1.78 0.74 - - 1.4 10.7 180
Armored cables
2 (1pr) 1.5 1/1.38 0.64 0.8 0.9 1.3 11.8 230
4 (2pr) 1.5 1/1.38 0.64 0.8 0.9 1.3 12.7 295
2 (1pr) 2.5 1/1.78 0.74 0.8 0.9 1.4 12.5 279
4 (2pr) 2.5 1/1.78 0.74 0.8 0.9 1.4 15.0 378

* includes additional 6mm2 integral earth conductor