Track Feeder Cables

Single core limited fire hazard (LFH) DC traction feeder cables for operating up to a nominal voltage of 750V DC on the London Underground and similar networks.

Special Cables / Railways & Mass Transit Cables / Track Feeder Cables for Railways and Underground applications

As the actual manufacturer of Track Feeder cables, not simply a distributor, Tratos has total control of the design, quality and manufacturing process from the purchase of the raw materials through to final testing and despatch to our customers. Tratos have years of experience supplying Railways and Mass Transit systems around the world.

Tratos manufacture Track Feeder cables using materials specially developed to withstand the operational and environmental conditions found in a trackside overground and underground Mass Transit environment.

These cables are designed to be installed surface laid on ballast without additional mechanical protection and subject to compressive loading on sharp-edged ballast.

Tratos Track Feeder cables are also suitable for installed in concrete troughing.

Both of the covering layers are extruded, crosslinked material applied by extrusion in two closely adherent layers. This covering forms a compact, homogeneous body that fits closely over the separator tape. This two-layer covering provides the optimum balance between electrical and mechanical properties. 

The inner layer of rubber compound developed by Tratos has excellent electrical and water-resistant properties, meeting or exceeding the requirements for Type GP5 of GP5 to BS 7655-1.2. The outer rubber compound was also developed in house by Tratos and is a physically robust Low Smoke Zero Halogen material having a maximum material operating temperature of 85ºC and mechanical performance equal or superior to type RS4 as defined in BS 7655 Section 2.3, with the additional benefit of a tear resistance greater than 7.5N/mm. The outer layer also provides outstanding resistance to chemical contamination, from mineral oil, diesel, weed killing and de-icing fluids containing up to 55% propylene glycol.

Tratos can supply cable with a fully water-blocked conductor if required.

Tracker Feeder Cables can be manufactured according to:

  • London Underground (LU) standards.Tratos
  • Network Rail specification NR/PS/ELP/21101 (formerly RT/E/S/21101)


High-performance Tratos cables – designed and manufactured for installation on the latest high-speed mass transit networks.

Contact us:

Tel: +44 20 3148 5178


Please don’t hesitate to contact us if you need additional information about our products.


 Tratos Railways & Mass Transit

 Tratos Rolling Stock


Indoor or outdoor use as a power cable forming any part of the DC traction power supply circuit originating within a substation and ending with connection to the traction conductor rail, as a connection from the conductor rail to a depot shore supply system or as a connector between two lengths of conductor rail. Including surface laid on track ballast without additional mechanical protection.


  • Conductor: 500mm2 and 935mm2  Stranded Class 2 tinned annealed copper to BS EN 60228 630mm2 Flexible Class 5 tinned annealed copper to BS EN 60228       
  • Separator: coloured tape
  • Insulation: Brown EPR 90oC GP5 to BS 7655-1.2, 5.00 mm mean thickness
  • Sheath: Black LSZH compound with yellow identification stripe, 7.5 mm mean thickness


Technical Specifications

Conductor operating temperature range: 25oC to +90oC
Minimum Bending radius 8 x nominal overall diameter
Nominal overall diameter
500 mm2 54.2 mm
630 mm2 65.8 mm
935 mm2 65.7 mm
Fire performance B2ca-s1a, d0, a1 as defined in BS EN 13501-6
LU fire safety performance of materials specification S1-085.

Contact us

Please, don’t hesitate to contact us for additional information on our company or our products.

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