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Product

Control & signal cableDIN VDE 0250-812300/500 V Shaft HoistCentral Steel Support Rope

NTMTWÖU Suspended Mine-Hoist CableDIN VDE 0250-812 300/500 V steel-core self-supporting rubber shaft-hoist control cable

NTMTWÖU suspended mine-hoist control cable (DIN VDE 0250-812, 300/500 V) for long vertical free-hanging suspension in underground mine shafts, featuring a central galvanised steel wire support rope, 3GI3 EPR cores, 'TW' anti-torsion braid, and 5GM3 PCP jacket.

Anti-torsion braid
Oil-resistant
Flame-retardant
Water-resistant
Order designation
NTMTWÖU 18G1.5
Outer Ø ≈
17.30 mm
Wall thickness
1.80 mm
Total weight ≈
642.3 kg/km
Min. bend R (fixed)
208 mm
All sizes (13)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
300/500 V
2000 V AC dielectric test
Support core
Steel wire rope
Up to 18–36 kN breaking load
Anti-torsion
TW textile braid
Vulcanised between 2 sheaths
Core insulation
3GI3 EPR rubber
Numbered cores + GNYE earth
Outer sheath
5GM3 PCP (ÖU)
Oil-, mine-water- & flame-proof
Service temp.
-35…+70 °C
+90 °C max conductor temp

Typical values for this cable type, based on DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118 — confirmed in the datasheet and quotation for your order.

Application fit

Is NTMTWÖU right for your machine?

Select NTMTWÖU for long vertical free suspension in mine shafts, shaft-sinking stages, vertical borehole pumps, and deep hoist cage signalling.

Free-hanging vertical run

Suitable

Central rubber-cushioned steel wire rope supports vertical shaft drops of 300–800 m with zero copper strain.

Construction hoist & mast-guided loop

Suitable

Counter-wound 'TW' anti-torsion braid between the two rubber sheaths prevents cable spinning and birdcaging in deep mine shafts.

Mine roadway & tunnel wall hangers

Suitable

5GM3 polychloroprene outer sheath resists acidic/alkaline mine shaft water, hydraulic oils, and flame propagation per IEC 60332-1-2.

Energy chain / drag chain

Not suitable

Steel support rope and heavy double sheath are built for vertical suspension, not tight-radius horizontal drag chains.

Use JZ-45440 P for drag chains
Typical machinesVertical Mine Shaft SignallingShaft-Sinking Platforms & Galloway StagesDeep Submersible Dewatering ControlsMine Cage Slack-Rope & Shaft InterlocksVertical Cavern & Dam Shafts

Construction

Layer by layer

DIN VDE 0250-812 construction: central rubber-sheathed galvanised steel wire rope, Class 5 tinned copper cores with 3GI3 EPR insulation laid in short pitch, inner rubber sheath, TW anti-torsion braid, and 5GM3 PCP jacket.

123456
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Tinned copper conductorsFine-stranded tinned copper (IEC 60228 Class 5)Laid with short pitch around the rubber-cushioned steel centre so copper remains strain-free
2Central steel support ropeRotation-free galvanised steel wire rope cushioned in an extruded elastomer profileBears the entire self-weight of the vertical shaft cable (breaking load 18–36 kN)
33GI3 EPR core insulationCross-linked ethylene-propylene rubber compound Type 3GI3 (numbered cores + GNYE)High dielectric strength in humid, condensing vertical mine shafts
4Inner rubber bedding sheathVulcanised elastomer inner jacket over the core assemblyLocks core lay geometry and anchors the torsion-protection braid
5TW anti-torsion textile braidHigh-tenacity synthetic yarn torsion-reinforcement braid ('TW')Eliminates axial twist when hanging freely over hundreds of metres in a mine shaft
65GM3 polychloroprene sheath (ÖU)Heavy-duty oil-resistant, flame-retardant polychloroprene outer jacket Type 5GM3 (black or yellow)Resists falling shaft water, rock spalling, and oil mist

NTMTWÖU 7G1.5–36G1.5

1.5 mm² vertical shaft signalling and slack-rope monitoring cable with central steel rope

NTMTWÖU 7G2.5–24G2.5

2.5 mm² heavy-duty shaft-sinking and deep hoist control cable for long vertical drops

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U
300/500 V AC (max. operating 330/550 V)
AC dielectric test voltage
2,000 V AC (50 Hz, 5 min)
Conductor DC resistance
IEC 60228 Class 5 tinned copper
Insulation resistance
≥ 100 MΩ·km at +20 °C (3GI3 EPR)

Thermal

Operating ambient temp.
-35 °C to +70 °C (suspended flexing)
Max. conductor temperature
+90 °C continuous · +250 °C short-circuit
Cold flexibility
Down to -35 °C shaft intake air

Mechanical

Central support element
Galvanised steel rope (18–36 kN break)
Free-hanging shaft length
Up to 500–800 m (with safety factor ≥ 5)
Min. bending radius (dynamic)
12 × overall cable diameter
Torsional stability
Rotation-compensated 'TW' double sheath

Resistance

Oil & mine water resistance
EN 60811-404 (5GM3 polychloroprene)
Flame retardance
IEC 60332-1-2 self-extinguishing ('U')
Abrasion & tear resistance
Heavy shaft duty double elastomer wall

Reference standards

Construction standard
DIN VDE 0250-812
Mine installation standards
DIN VDE 0118 & DIN VDE 0298-3
RoHS & REACH
RoHS 3 & REACH compliant

Identification

Outer sheath colour
Black or high-visibility shaft yellow
Surface legend
TEBAOFLEX NTMTWÖU [nGmm²] 300/500V VDE 0250-812
Customs tariff (HS)
8544.49

Sizes

13 standard configurations (NTMTWÖU)

Engineering dimensions, conductor stranding, mass and electrical ratings for NTMTWÖU per DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118.

Dimensions & weights
Order designationCross-section / sizeConductor buildWall ≈
mm		Outer Ø ≈
mm		Metal
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard NTMTWÖU configurations
NTMTWÖU 7G1.57G1.5 mm²Class 5 Sn-Cu + Steel Core (1.5 mm²)1.6011.40100.8267.1137
NTMTWÖU 12G1.512G1.5 mm²Class 5 Sn-Cu + Steel Core (1.5 mm²)1.8015.00172.8460.8180
NTMTWÖU 18G1.518G1.5 mm²Class 5 Sn-Cu + Steel Core (1.5 mm²)1.8017.30259.2642.3208
NTMTWÖU 24G1.524G1.5 mm²Class 5 Sn-Cu + Steel Core (1.5 mm²)1.8019.70345.6842.4236
NTMTWÖU 30G1.530G1.5 mm²Class 5 Sn-Cu + Steel Core (1.5 mm²)1.8021.30432.01,012.7256
NTMTWÖU 36G1.536G1.5 mm²Class 5 Sn-Cu + Steel Core (1.5 mm²)1.8023.00518.41,195.5276
NTMTWÖU 7G2.57G2.5 mm²Class 5 Sn-Cu + Steel Core (2.5 mm²)1.6012.80168.0377.7154
NTMTWÖU 12G2.512G2.5 mm²Class 5 Sn-Cu + Steel Core (2.5 mm²)1.8016.90288.0653.6203
NTMTWÖU 18G2.518G2.5 mm²Class 5 Sn-Cu + Steel Core (2.5 mm²)1.8019.60432.0923.7235
NTMTWÖU 24G2.524G2.5 mm²Class 5 Sn-Cu + Steel Core (2.5 mm²)1.8022.50576.01,224.0270
NTMTWÖU 30G2.530G2.5 mm²Class 5 Sn-Cu + Steel Core (2.5 mm²)1.8024.40720.01,482.1293
NTMTWÖU 7G47G4 mm²Class 5 Sn-Cu + Steel Core (4 mm²)1.6015.70268.8584.3188
NTMTWÖU 12G412G4 mm²Class 5 Sn-Cu + Steel Core (4 mm²)1.8020.90460.81,019.9251
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal engineering values for NTMTWÖU subject to standard manufacturing tolerances per DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118.

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
Dielectric spark / high-voltage withstand test100 % in-line spark and AC/DC dielectric withstand per DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118Every manufactured length
Conductor DC resistance & continuity checkWithin maximum 20 °C resistance limit specified for NTMTWÖUEvery spool or drum length
Sample tests
Insulation resistance & dimensional verificationWall thickness, concentricity and insulation resistance per DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118Per production batch
Environmental, mechanical & EMC qualificationQualified to DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118 thermal, mechanical and environmental performance criteriaType qualification

Inspection certificate

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

Product approvals

DIN VDE 0250-812 / DIN VDE 0298-3 / DIN VDE 0118CE (2014/35/EU) & RoHS 3 (2015/863/EU) CompliantREACH SVHC Compliance Verified

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX NTMTWÖU 18G1.5 300/500V DIN VDE 0250-812 MINE HOIST
Delivery form
Export wooden drums, tactical reels or coils
Standard lengths
100 m · 500 m · 1000 m (or custom cut lengths)
MOQ
100 m (stock sizes) · 300–500 m (custom build)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFNTMTWÖU Suspended Mine-Hoist Cable – technical datasheet13 sizes · construction, technical data, approvalsXLSXNTMTWÖU spec data (Excel)All 13 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 every letter in the VDE designation NTMTWÖU stand for?
'N' = German national standard cable, 'TM' = heavy flexible drum/hoist rubber cable with load-bearing core (Trommel- / Tragorganleitung), 'TW' = torsion-resistant textile braid between inner and outer sheaths, 'Ö' = oil-resistant polychloroprene jacket, and 'U' = flame-retardant.
How is NTMTWÖU anchored at the mine shaft headframe?
At the top suspension point, the outer jacket and cores are broken out inside a termination box so the central galvanised steel wire rope can be clamped directly to a thimble/clevis anchor with a safety factor ≥ 5, while an external stocking grip supports the outer sheath entrance.
Why are the insulated copper cores laid with a short pitch around the rubber-cushioned steel rope?
When the central steel wire rope elongates elastically by 0.2–0.5 % under several hundred metres of suspended weight, the helically laid copper cores simply contract slightly against the soft rubber cushion around the steel rope, ensuring zero tensile stress on the copper conductors.
How does NTMTWÖU differ from 3GRDGÖU?
NTMTWÖU uses a central galvanised steel wire rope and 3GI3 EPR cores for high-load vertical mine shaft suspension up to 500–800 m, whereas 3GRDGÖU uses ultra-limp 3G silicone cores for gravity coiling into crane spreader collector baskets.

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NTMTWÖU Suspended Mine-Hoist Cable

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