Wiring Looms for the Rail Industry

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London Underground Limited (L.U.L.) operates a vast fleet of rolling stock on its various lines. These underground trains are responsible for the safe and efficient carriage of around 3 million passengers daily on the capital's 'tube' network.

Rolling stock is expensive and is robustly built for an extended service-life. During a typical train's lifetime it will undergo several cycles of preventative and scheduled maintenance. There may also be times when upgrading vital systems is required.

Cranfield Electrical Ltd is proud to be associated with the refurbishment of rolling-stock on the London Underground network.

We supply antenna and tacho-generator harnesses. These form part of the important A.T.O. and A.T.P. systems on the train.

In all cases these are manufactured in robust, low-smoke-zero-halogen (L.S.0.H / L.S.Z.H.) materials and with the utmost care and attention.


We procure the materials, manufacture & test the assemblies to ensure the high standards that LUL expect. The picture shows an MS3057, military-style reverse bayonet connector with 10C sealed clamp, as made by ITT (VEAM), Amphenol and others.

A Reverse-Bayonet Connector, typical of those used in mass-transit applications, such as the London-Underground. Note the use of gold-plated terminals and heat-shrinkable sealing to ensure optimal signal-continuity and prevent moisture ingres.


Click the link to reveal more about this LSZH cable gland and its application for use on the London Underground. Such items are routinely used in rolling-stock for the Central, Bakerloo and Victoria lines of the 'Tube' network.
LSZH Brass Cable Glands

A rugged brass cable gland made from low-smoke-zero-halogen materials.



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Please click the link for further details of CEL's special mouded parts for the Rail and Mass-Transit Industries. Please contact us with details of your train or bogey application. This one is used on London Underground's tube subway system.
Special Mouldings

A typical custom moulding in special LSZH grey compound.



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The image depicts one of our custom-printed-labels. The label is a polymer made from zero-halide material that has been thermally printed using non-toxic ribbon. It will resist oils and grease. The label is attached using special LSZH-cable-ties.
High-Visibility Custom-Printed Labels

Labels for railway applications.



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The PIDG-Ring-Terminals fitted to our assemblies are typical of those used on the London Underground Central Line, Victoria Line and Bakerloo Line. They are robust, resistant-to-vibration and of course insulated using LSZH (halogen or halide-free) plastic
Rail-Approved Ring Terminals

Rail-approved PIDG terminals conform to BREL and LUL specifications. They are made to a high specification and fitted with care and attention by our experienced staff.



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A typical antenna connector assembly for use on London's famous Underground metro system - 'The tube'. Note the robust, sealed reverse-bayonet design - built to last in harsh-environments. This type of cable-assembly allows signal transfer in arduous conditions of flying debris, moisture, oil, grease and dust.


CEL produce rugged signal harnesses for the London Underground. The connector shown is a VEAM/ITT style 3057 reverse bayonet connector with 90degree backshell and gold-plated sockets. The back-shell is fitted with a water-resistant 12C clamp. All LSZH.

A signal assembly fitted to underground railway rolling-stock. The loom is substantial & ruggedised to meet the challenges of arduous service conditions. This includes thousands of flexing cycles, protection from flying debris (stones or ballast), and sealing to prevent water ingress. Materials are resistant to oil and grease, and are all Low-Smoke-Zero-Halogen. High-visibility labelling completes the package.




Find out more about Cranfield Electrical's extensive range of products and services



Why not contact us with your requirements for new or existing rail harnesses?