
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.

![]() 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. ![]() |
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LSZH Brass Cable Glands
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A rugged brass cable gland made from low-smoke-zero-halogen materials.
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Special Mouldings
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A typical custom moulding in special LSZH grey compound.
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High-Visibility Custom-Printed Labels
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Labels for railway applications.
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Rail-Approved Ring Terminals
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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.

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![]() ![]() 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. ![]() |
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![]() Find out more about Cranfield Electrical's extensive range of products and services |

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![]() Why not contact us with your requirements for new or existing rail harnesses? |
