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Product

power connection cable seriesDIN VDE 0250-813 NTMCWÖU3.6/6 kV to 18/30 kV UnscreenedClass 5 Tinned Cu + EPR/PCP

NTMCWÖU Extra-Flexible Single-Core MV Connection CableDIN VDE 0250-813 3.6/6–18/30 kV unscreened extra-flexible EPR/PCP MV jumper cable

NTMCWÖU (and (N)TMCWÖU) Extra-Flexible Single-Core Medium-Voltage Connection Cable (3.6/6 kV, 6/10 kV, 12/20 kV & 18/30 kV; 16 mm² to 500 mm²) engineered to DIN VDE 0250-813 with Class 5 fine-stranded tinned copper conductor, inner.

5 × OD Tight-Bend Jumper
No MV Stress-Cone Needed
5GM3 Weather & Oil Resistant
DIN VDE 0250-813
Order designation
NTMCWÖU 1×70 6/10kV
Conductor & voltage
1 × 70 mm² Cl.5 Tinned Cu · 6/10 kV
Outer Ø ≈
23.6 mm
Weight ≈
965 kg/km
Ampacity (air 30°C)
305 A
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Standard
DIN VDE 0250-813
Single-core flexible MV rubber
Voltage classes
3.6/6 to 18/30 k
3.6/6, 6/10, 12/20 & 18/30 kV
Cross-sections
1 × 16 to 500 mm
Class 5 fine tinned Cu
Stress control
Inner Semicon ('
Unscreened outer (fast lugging)
Insulation
3GI3 EPR (+90 °C
Ozone & corona resistant
Outer sheath
5GM3 PCP ('WÖU')
Weather, oil & flame resistant

Typical values for this cable type, based on DIN VDE 0250-813 — confirmed in the datasheet and quotation for your order.

Application fit

Is NTMCWÖU right for your machine?

Because NTMCWÖU has an inner semiconducting conductor stress screen ('C') and thick 3GI3 EPR + 5GM3 rubber sheath without an outer metallic screen, it terminates with a simple crimp lug—no MV stress-cone kit required—making it the fastest, most compact jumper for enclosed MV switchgear, motors and transformers.

Motor stator, traction & converter leads

Suitable

Terminates directly onto 3.6/6 kV, 6/10 kV and 12/20 kV motor terminal studs and transformer bushings where space is too short for a.

Switchgear & control cabinet wiring

Suitable

5 × OD minimum bend radius routes effortlessly between circuit breakers, contactors, current transformers and busbars inside.

TBM gantry & advancing tunnel reel

Suitable

5GM3 polychloroprene ('WÖU') rubber jacket resists transformer oil, condensation, ozone and IEC 60332-1-2 flame propagation.

Fixed installation

With conditions

Unscreened MV cable: outer surface is not touch-safe under voltage and must be installed inside closed switchgear cabinets, on.

Use Screened (N)TMCGC11Y
Typical machinesMedium-Voltage Switchgear Internal Bus & Breaker Jumpers6 kV / 10 kV / 15 kV Industrial Motor Terminal LeadsDry-Type & Oil-Filled Transformer Secondary ConnectionsLocomotive & Traction Converter High-Voltage CubiclesWind Turbine & Marine Propulsion MV Drive Cabinets

Construction

Layer by layer

NTMCWÖU Extra-Flexible Single-Core MV Connection Cable showing Class 5 fine-stranded tinned copper conductor, extruded inner semiconducting elastomer stress-equalizing layer ('C'), +90 °C 3GI3 ethylene propylene rubber (EPR) MV insulation, inner elastomer layer, and Black or Red 5GM3 weather/oil-resistant polychloroprene ('WÖU') outer sheath.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Class 5 fine-stranded tinned copper conductorElectrolytic tin-coated annealed flexible copper wires per IEC 60228 / DIN VDE 0295 Class 5 (16 mm² to 500 mm²)Tight 5 × OD bend radius and low terminal bushing mechanical load
2Extruded inner semiconducting elastomer layer ('C')Vulcanized semiconducting rubber layer bonded over the stranded conductorEqualizes electric stress at the conductor surface to prevent internal corona
33GI3 Ethylene Propylene Rubber (EPR) MV dielectric90 °C ozone-, corona- and heat-resistant thermoset EPR compound Type 3GI3 per DIN VDE 0207-20High dielectric withstand without requiring an outer metallic screen
45GM3 Polychloroprene ('WÖU') weather & oil-resistant sheathHeavy-duty cross-linked polychloroprene rubber compound Type 5GM3 per DIN VDE 0207-21 in Black or RedW = Weatherproof · Ö = Oil-resistant · U = Flame-retardant

NTMCWÖU 3.6/6 kV & 6/10 kV (1×16 to 1×500 mm²)

Unscreened flexible MV jumper cable for 3.3 kV, 6.6 kV and 10/11 kV motor terminal boxes and switchgear cells

(N)TMCWÖU 12/20 kV & 18/30 kV (1×25 to 1×500 mm²)

Unscreened flexible MV connection cable for 15 kV, 20 kV and 30 kV transformer cubicles and dry-type coil leads

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on DIN VDE 0250-813. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage tiers (Uo/U)
3.6/6 kV · 6/10 kV · 12/20 kV · 18/30 kV (Umax 7.2 / 12 / 24 / 36 kV)
Routine AC test voltage
11 kV (3.6/6) · 17 kV (6/10) · 29 kV (12/20) · 43 kV (18/30) for 5 min
Max. DC resistance @ 20 °C
0.798 Ω/km (25) · 0.393 Ω/km (50) · 0.206 Ω/km (95) · 0.0817 Ω/km (240)
Free-air ampacity (30 °C)
158 A (25) · 245 A (50) · 375 A (95) · 500 A (150) · 680 A (240)

Thermal

Max. conductor temperature
+90 °C continuous operation
Short-circuit temperature
+250 °C (up to 5 s)
Ambient temperature range
-40 °C to +80 °C (fixed) · -25 °C to +80 °C (flexible)

Mechanical

Min. bend radius
5 × OD (fixed cubicle routing) · 10 × OD (flexible movement)
Max. tensile load
15 N / mm² of copper conductor cross-section
Termination clearance
No outer screen strip-back needed; compact lug termination

Resistance

Ozone & corona resistance
3GI3 EPR + 5GM3 PCP resists high-voltage surface ozone in air
Oil & chemical resistance
EN 60811-404 mineral & transformer oil resistant ('Ö')
Flame propagation
IEC 60332-1-2 / DIN EN 60332-1-2 self-extinguishing ('U')

Reference standards

Design standard
DIN VDE 0250-813 (NTMCWÖU)
Installation & ampacity
DIN VDE 0298-3 & DIN VDE 0298-4
RoHS, REACH & CE
2011/65/EU RoHS 2, REACH & CE compliant

Identification

VDE code breakdown
N=VDE std · TM=MV flex · C=Inner semicon · W=Weather · Ö=Oil · U=Flame
Outer sheath colour
Black or Red
Customs tariff (HS)
8544.6010

Sizes

6 standard NTMCWÖU 6/10 kV & 12/20 kV (DIN VDE 0250-813) configurations

Cross-section, voltage class, nominal outer diameter, weight, DC resistance and free-air ampacity.

6/10 kV & 12/20 kV dimensions & ampacity
VDE designationConductor & voltageOuter Ø ≈
mm		Weight ≈
kg/km		Max. DC R
Ω/km		Air 30°C
A		Enquiry
6/10 kV NTMCWÖU Unscreened
NTMCWÖU 1×35 6/10kV1 × 35 mm² Cl.5 Tinned Cu · 6/10 kV19.85800.5650198
NTMCWÖU 1×70 6/10kV1 × 70 mm² Cl.5 Tinned Cu · 6/10 kV23.69650.2770305
NTMCWÖU 1×120 6/10kV1 × 120 mm² Cl.5 Tinned Cu · 6/10 kV27.81,4900.1640430
NTMCWÖU 1×240 6/10kV1 × 240 mm² Cl.5 Tinned Cu · 6/10 kV35.22,7600.0817680
12/20 kV (N)TMCWÖU Unscreened
(N)TMCWÖU 1×50 12/20kV1 × 50 mm² Cl.5 Tinned Cu · 12/20 kV25.48900.3930248
(N)TMCWÖU 1×150 12/20kV1 × 150 mm² Cl.5 Tinned Cu · 12/20 kV33.41,9500.1320500
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Also stocked in 3.6/6 kV and 18/30 kV (and 26/45 kV railway pantograph version) from 16 mm² to 500 mm².

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
100 % High-voltage AC water-bath dielectric test (11–43 kV for 5 min)Zero breakdown across entire 3GI3 EPR + 5GM3 rubber wallEvery manufactured drum
Sample tests
5GM3 polychloroprene hot-oil immersion, tensile & IEC 60332-1-2 flameMeets DIN VDE 0207-21 mechanical and oil retention limitsPer production batch
DIN VDE 0207-20 high-concentration ozone & corona endurance testZero surface ozone cracking when bent around mandrel under HV stressType qualification

Inspection certificate

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

Product approvals

DIN VDE 0250-813 (NTMCWÖU)DIN VDE 0298-3 / 0298-4RoHS 2, REACH & CE

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX NTMCWÖU 6/10kV DIN VDE 0250-813 CE
Delivery form
Fumigated wooden drums or steel export reels
Standard lengths
500 m · 1000 m (or custom cut lengths)
MOQ
100 m (standard) · 500 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFNTMCWÖU Extra-Flexible Single-Core MV Connection Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSXNTMCWÖU spec data (Excel)All 6 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.

Why do switchgear and motor manufacturers use unscreened NTMCWÖU for short internal jumpers instead of screened MV cable?
On a screened MV cable, each end requires a 300–500 mm heat-shrink or cold-shrink stress-control termination kit to grade the electric field where the copper screen ends. On short 0.8–3.0 m jumpers inside a motor terminal box, transformer kiosk or switchgear cubicle, there is often not enough physical height for two stress cones. Because NTMCWÖU has no outer metallic screen, there is no screen cut-back point—so it terminates with a standard compression lug and insulating boot.
What does the 'C' in NTMCWÖU stand for if the cable has no copper screen?
In DIN VDE 0250-813 nomenclature for NTMCWÖU, the single 'C' after 'NTM' designates the inner semiconducting elastomer conductor stress-smoothing layer (Innere Leitschicht) extruded over the Class 5 tinned copper conductor. Screened versions carry 'CGC' (as in (N)TMCGCWÖU or (N)TMCGC11Y).
What installation precautions apply to unscreened NTMCWÖU?
Per DIN VDE 0298-3, because the outer rubber surface is not held at earth potential by a metallic screen, NTMCWÖU must be installed inside locked electrical operating areas/cubicles out of human reach, and routed on insulating cleats or spaced slightly away from sharp grounded metal edges to avoid continuous partial discharge at high voltages.
If we need a halogen-free LSZH version of this unscreened flexible cable for wind turbines or tunnels, what should we specify?
Specify (N)TMCHXOEU (or 26/45 kV (N)TMCWOEU / (N)TMCGCHXOEUK for rail), which replaces the polychloroprene sheath with a halogen-free 'HX' elastomer compound.

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NTMCWÖU Extra-Flexible Single-Core MV Connection Cable

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