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Product

CGAU 1.8/3 kV rail & traction single-core1.8/3 (3.6) kVShort-Circuit-Proof1.5 – 300 mm² Class 5

CGAU Rubber Single-Core Cable for Rail Vehicles and Equipment1.8/3 (3.6) kV EPR/PCP short-circuit-proof rubber single-core cable for rail vehicles

Heavy-duty dual-layer elastomer single-core power and equipment cable (CGAU) rated U0/U = 1.8/3 (3.6) kV AC (3.6/5.4 kV DC) with Class 5 tinned copper conductor, EPR/HEPR dielectric (3GI3), and oil/flame-resistant polychloroprene outer sheath (5GM2).

Oil-resistant
Flame-retardant
Ozone, UV & moisture
Approved
Order designation
CGAU-18/30-1X50
Cross-section
1 × 50 mm²
Nominal OD
15.6 mm
Weight
595 kg/km
Ampacity (30°C)
276 A
All sizes (14)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
1.8/3 (3.6) kV
Up to 3.6/5.4 kV DC traction bus
Cross-section
1.5 to 300 mm²
IEC 60228 Class 5 tinned copper
Insulation
EPR 3GI3 (+90°C)
+250 °C short-circuit rating
Outer sheath
PCP 5GM2
Oil, diesel, ozone & flame resistant
Safety class
Short-Cct Proof
Up to 1,000 V per VDE 0100-520
Bend radius
4–5 × OD
Flexible bogie & cabinet routing

Typical values for this cable type, based on NF F 63-305 / DIN VDE 0250-602 / IEC 60092-353 — confirmed in the datasheet and quotation for your order.

Application fit

Is CGAU right for your machine?

Inherently short-circuit and earth-fault-proof up to 1,000 V thanks to its reinforced dual-extruded 1.8/3 kV EPR insulation and heavy 5GM2 rubber sheath.

Motor stator, traction & converter leads

Suitable

Withstands bogie vibration, diesel oil, brake dust and −40 °C to +90 °C thermal cycling on locomotive traction motors.

Switchgear & control cabinet wiring

Suitable

Inherently short-circuit-proof per VDE 0100 Part 520 for unprotected busbar feeds ahead of main circuit breakers.

VFD inverter to AC motor screened feeder

Suitable

3.6 kV AC / 5.4 kV DC margin handles 750 V, 1,500 V and 3,000 V DC railway traction converter DC-link wiring.

Energy chain / drag chain

Not suitable

Designed for fixed cabinet, conduit and bogie cleated routing; for screened mining/rail feeds use NSGAFCMÖU.

Use NSGAFCMÖU Screened
Typical machinesDiesel-Electric & Electric LocomotivesMetro, Tram & EMU Traction Converter Cabinets750 V / 1,500 V / 3,000 V DC Busbar & Battery WiringIndustrial Switchgear Short-Circuit-Proof JumpersAuxiliary Generator & Resistor Bank Leads

Construction

Layer by layer

Dual-wall elastomer architecture: IEC 60228 Class 5 tinned copper conductor + polyester separator tape + 1.8/3 kV ethylene propylene rubber (EPR 3GI3) primary insulation + heavy-duty polychloroprene / chlorosulphonated elastomer (5GM2) outer sheath.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Fine-stranded Class 5 tinned copper conductorAnnealed tinned copper wires to IEC 60228 / EN 60228 Class 5 (1.5 mm² to 300 mm²)Provides corrosion immunity against sulphur vulcanisation and high vibration fatigue life on rail bogies
2Polyester separating tape (≥ 16 mm²)Thin halogen-free separator foil over the stranded conductorAllows clean, rapid insulation stripping for heavy compression lugs
31.8/3 kV EPR (3GI3) primary dielectricCross-linked ethylene propylene rubber (EPR compound 3GI3 to VDE 0207-20) rated +90 °C continuous and +250 °C short-circuitProvides 6.0 kV AC test withstand and high ozone/corona resistance
4Oil- & flame-retardant PCP / elastomer outer sheath (5GM2)Heavy-duty black polychloroprene / elastomer outer jacket (compound 5GM2 to VDE 0207-21)Protects against diesel fuel, mineral oil, ballast abrasion and flame spread (IEC 60332-1-2)

CGAU-CTRL (1.5 mm² to 16 mm² Auxiliary & Control)

Compact 1.8/3 kV short-circuit-proof single-core leads for contactor coils, current transformers, battery fuses and auxiliary panels

CGAU-PWR (25 mm² to 300 mm² Traction Power & DC Link)

Heavy-current flexible single-core power leads for traction motor jumpers, inverter DC links, braking resistors and main switchgear

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on NF F 63-305 / DIN VDE 0250-602 / IEC 60092-353. Values for your order are confirmed in the datasheet and quotation.

Electrical

Nominal AC voltage (U0/U)
1.8/3 kV · Max operating Um = 3.6 kV AC
Max. operating DC voltage
2.7/5.4 kV DC
Routine AC test voltage
6.0 kV AC rms for 5 min
Max. conductor temperature
+90 °C continuous · +250 °C short-circuit (5 s)

Thermal

Operating temperature (fixed)
−40 °C to +80 °C (ambient)
Operating temperature (flexing)
−25 °C to +80 °C

Mechanical

Cross-section range
1.5 mm² to 300 mm² (Class 5 tinned copper)
Min. bend radius
4 × OD (fixed ≤ 12 mm) · 5 × OD (fixed > 12 mm) · 10 × OD (flexing)
Max. tensile load
15 N/mm² of copper cross-section

Resistance

Oil & fuel resistance
EN 60811-404 mineral oil & diesel fuel resistant
Flame retardancy
IEC 60332-1-2 / NF C 32-070 C2
Ozone & weather resistance
EN 60811-403 ozone resistant for outdoor bogie cleating

Reference standards

Reference standards
NF F 63-305 · DIN VDE 0250-602 · IEC 60245
Short-circuit-proof routing
DIN VDE 0100-520 / EN 50153 rolling stock

Identification

Outer sheath colour
Black
Surface marking
TEBAOFLEX CGAU 1.8/3 kV [MM2] 90C IEC 60332-1-2
Customs tariff (HS)
8544.60

Sizes

14 standard CGAU 1.8/3 kV rubber single-core cable sizes (1.5 mm² to 300 mm²)

Conductor construction, DC resistance at 20 °C, nominal outer diameter, linear weight and free-air ampacity at 30 °C ambient.

Cross-sections, OD, weight & ampacity
Order designationCross-Section
mm²		Max Wire Ø
mm		Max R @20°C
Ω/km		Nominal OD
mm		Weight
kg/km		Ampacity
A (30°C)		Fixed R
mm		Enquiry
Control, Battery & Auxiliary Sizes — 1.5 mm² to 25 mm²
CGAU-18/30-1X1.51 × 1.50.2613.7007.0643035
CGAU-18/30-1X2.51 × 2.50.268.2107.5784138
CGAU-18/30-1X41 × 4.00.315.0908.0965540
CGAU-18/30-1X61 × 6.00.313.3908.51187043
CGAU-18/30-1X101 × 100.411.9509.51659848
CGAU-18/30-1X161 × 160.411.24010.823013254
CGAU-18/30-1X251 × 250.410.79512.533017663
Traction Motor, Inverter & Main Busbar Sizes — 35 mm² to 300 mm²
CGAU-18/30-1X351 × 350.410.56513.843521869
CGAU-18/30-1X501 × 500.410.39315.659527678
CGAU-18/30-1X701 × 700.510.27717.579534788
CGAU-18/30-1X951 × 950.510.21019.81,03041699
CGAU-18/30-1X1201 × 1200.510.16421.61,275488108
CGAU-18/30-1X1851 × 1850.510.10826.01,910644130
CGAU-18/30-1X3001 × 3000.510.06631.83,020898159
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • For ambient temperatures above 30 °C, apply standard VDE 0298-4 derating factors (e.g. 0.82 at 50 °C, 0.71 at 60 °C for +90 °C EPR).

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
6.0 kV AC 5-minute dielectric withstand testZero breakdown across the 1.8/3 kV EPR insulation wall100 % of production lengths
Conductor DC resistance & spark testVerify IEC 60228 Class 5 tinned copper resistance at 20 °C100 % of production lengths
Sample tests
EN 60811-404 oil immersion, ozone & IEC 60332-1-2 flame testVerify 5GM2 elastomer retention of tensile/elongation in hot oilType approval

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

NF F 63-305 & DIN VDE 0250-602 1.8/3 kV CompliantVDE 0100-520 Inherently Short-Circuit & Earth-Fault Proof

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX CGAU 1.8/3 kV [MM2] EPR/PCP 90C NF F 63-305 / VDE 0250
Delivery form
100 m coils or 500 m / 1,000 m non-returnable wooden drums
Stock range
1.5 mm² through 300 mm² available in standard black
Lead time
2–3 weeks ex-works

Technical documents

Downloads

PDFCGAU Rubber Single-Core Cable for Rail Vehicles and Equipment – technical datasheet14 sizes · construction, technical data, approvalsXLSXCGAU spec data (Excel)All 14 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What does 'inherently short-circuit and earth-fault proof' mean for CGAU 1.8/3 kV cables?
In low-voltage switchgear, battery rooms, and railway traction cabinets (up to 1,000 V AC / 1,500 V DC), wiring located upstream of the first protective fuse or circuit breaker cannot rely on automatic disconnection if an insulation fault occurs. Because CGAU combines a 1.8/3 kV rated EPR core with a reinforced mechanical rubber sheath (5GM2), standards such as DIN VDE 0100-520 classify it as inherently short-circuit and earth-fault proof even when laid directly on grounded metal frames.
How does CGAU relate to German NSGAFÖU 1.8/3 kV cable?
CGAU (originally standardized under French rolling-stock specification NF F 63-305) and German NSGAFÖU (DIN VDE 0250-602) share the same 1.8/3 (3.6) kV voltage rating, Class 5 tinned copper conductor, 90 °C EPR insulation, and oil/flame-resistant polychloroprene outer sheath, making them functionally interchangeable in rail and switchgear applications.
Can CGAU be used on 1,500 V DC and 3,000 V DC railway traction systems?
Yes. With a rated AC voltage of 1.8/3 (3.6) kV and a routine test voltage of 6.0 kV AC, CGAU is rated for continuous DC working voltages up to 2.7/5.4 kV DC, covering 750 V DC metro third-rail, 1,500 V DC, and 3,000 V DC overhead catenary rolling-stock equipment.
When should I choose screened NSGAFCMÖU instead of unscreened CGAU?
Choose screened NSGAFCMÖU when routing PWM traction inverter motor leads where electromagnetic emissions (EMC) must be contained, or in underground mining switchgear where a concentric copper earth screen (`CM`) is required for instant phase-to-earth fault detection.

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CGAU Rubber Single-Core Cable for Rail Vehicles and Equipment

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Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
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- Exposure (outdoor, water, oil, abrasion): 
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