Railway Rolling Stock Harness to EN 45545-2

Q: What is the prototype quantity?

Prototype quantity is 5 pcs minimum with a 3 working day turnaround. Production starts at 500 pcs and ships 14 working days from approval.

Overview

Rolling stock wiring is specified around what happens in a fire rather than around what happens in normal service. A railway rolling stock harness is therefore a cable selection exercise before it is a harness design exercise: smoke density, toxicity and flame spread are decided by the grade the vehicle is being approved to, and that grade comes from your engineering team rather than from a supplier data sheet. We build the harness with the cable grade your drawing names and pass through the mill documentation that goes with it.

Key Specifications

Build Type	Build to drawing or build to sample
Cable Construction	Electron beam cross-linked halogen free
Cable Families	RADOX or SABIX style, or a customer nominated equivalent
Fire Standard	Built to the grade named on the project drawing
Temperature Range	Per the selected cable data sheet, as stated on your drawing
Oil and Fuel	Oil and fuel resistant jacket option for underframe runs
Terminations	M12 A, D and X coded, circular connectors, terminal blocks
Testing	Continuity, dielectric withstand, insulation resistance, pull test

What EN 45545-2 governs

EN 45545-2 is the European fire safety standard for rolling stock. In general terms it sets requirements for materials and components by hazard level, with the level rising with the consequence of a fire in that part of the vehicle, and it is read together with the test methods it references for flame spread, smoke density and toxicity. That is an industry definition of how the requirement is structured, not a claim about an approval we hold. Your project names the hazard level and the evidence it needs, and we build and document to that.

The requirement is built from several measured behaviors, and they do not pull in the same direction:

What the standard looks at	Why it matters on a vehicle	What the harness can influence
Flame spread	How fast a fire travels along a run once it starts	Cable grade, and whether the loom is a single run or a dense bundle
Smoke density	Visibility during evacuation	Jacket and sleeving material, and how much of it is in the vehicle
Toxicity	The gases released, which decide survivability	Halogen free construction, selected by your specification
Heat release	How much energy the fire feeds back into itself	Cable grade and the total volume of non-metallic material
Flaming droplets	Whether burning material spreads the fire downward	Jacket and sleeving selection

The third column is the honest one. Four of those five are decided by the cable you specify. What the harness builder controls is how much non-metallic material ends up in the bundle and how it is supported.

The same vehicle contains several different requirements. Position decides which one applies:

Where the loom runs	What usually drives the requirement	Notes from the build
Passenger saloon and ceiling	Smoke and toxicity, because evacuation time is the constraint	Keep non-metallic volume low and avoid over-sleeving
Underframe and bogie	Oil, fuel, water ingress and mechanical damage	Oil and fuel resistant jacket, with armor at frame edges
Driver cab and console	Saloon requirements plus equipment density	Dense looms need the clamp plan agreed early
Door control and door edge	Cyclic flexing on top of the fire performance	Flex life and fire grade have to be met by the same cable
HVAC and lighting circuits	Heat near the source and the grade for that area	Check the temperature at the hottest point of the route

Cable constructions we build with

Electron beam cross-linked halogen free constructions are the usual starting point for these vehicles, in the RADOX or SABIX style families or an equivalent you nominate. Where the project names a national fire standard we source to it: EN 45545-2 hazard levels as defined by the standard, DIN 5510-2, NF F16-101 or UNI CEI 11170, depending on where the vehicle is going into service. Oil and fuel resistant jackets are available for underframe runs. Temperature range comes from the data sheet of the cable your drawing names, and we do not publish one of our own.

Terminations and mechanical duty

We terminate M12 A, D and X coded connectors, circular connectors and the terminal blocks already on your schedule. Vibration and shock requirements for body mounted equipment come from your specification; we build to the clamping interval and strain relief method on the drawing and note anywhere the loom layout makes that difficult to achieve. Where a run passes through a body panel, the rating structure is defined by IEC 60529 as an industry standard, and the rating your assembly is built and verified to is the one stated on your drawing, not one we assume.

Typical applications for this railway rolling stock harness

Door control and door edge sensing looms
Brake and speed sensor wiring under the frame
HVAC, lighting and passenger information circuits
Traction auxiliary and converter auxiliary wiring
Retrofit looms for refurbishment programs, built from a sample

Testing

Continuity and polarity on every circuit
Dielectric withstand test at the voltage stated on the drawing
Insulation resistance recorded against the serial number
Pull test on terminations and visual inspection of clamping and sleeving

Workmanship and ordering

Workmanship on Railway Rolling Stock Harness builds follows IPC/WHMA-A-620 Class 3, the line is run under ISO 9001, and the termination range is 32 to 12 AWG. Every Railway unit is checked for continuity and pinout before packing, and seal checking is quoted whenever an ingress rating is on the drawing.

Quote Railway Rolling Stock Harness builds from 1 to 50 pcs and they ship in 3 working days; at volume the minimum is 500 pcs with 14 working days after approval. Tooling not already held adds around 10 working days. OEM and ODM Railway runs go out under your part number and labeling and material certificates with first-article reports are available.

RoHS and REACH declarations are provided per project together with the agreed test reports; the documentation scope is listed under certifications and compliance. If your drawing specifies a UL style, we build to that drawing and supply the UL reference with the shipment instead of substituting an equivalent. The molded body is shot on our own presses; material choice and bond behavior follow the process described under overmold materials and injection parameters. More background: how we build and document first articles. Any tooling we cut for this part stays yours, maintained in our own tool room under your part reference.

Frequently Asked Questions

Do you hold an EN 45545-2 approval?

No. The standard defines how the requirement is structured. Your project names the hazard level and the evidence it needs; we build with the cable grade your drawing specifies and pass through the mill documentation for it.

Which cable families can you build with?

Electron beam cross-linked halogen free constructions in the RADOX or SABIX style families, or an equivalent you nominate on the drawing.

Can you build to DIN 5510-2 or NF F16-101 as well?

Yes. Where the project names the standard we source the cable to it and build to the drawing.

What is the prototype quantity?

Quote Railway Rolling Stock Harness builds from 1 to 50 pcs and they ship in 3 working days; at volume the minimum is 500 pcs with 14 working days after approval.