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Product

Heavy-duty rubber cables (NSSHÖU)MGM 112 · BS 6708 Type 331U0/U 1.9/3.3 kV3 Screened + 1 Earth · PWA

MGM 112 Type 331 Cable1.9/3.3 kV 4-core (3 screened + 1 earth) pliable-wire-armoured MV mining cable

Medium-voltage 1.9/3.3 kV 4-core underground mining feeder cable to MGM 112 and BS 6708 Type 331 featuring three individually copper/nylon-screened EPR phase cores plus one unscreened earth core around a rubber cradle, inner bedding, steel PWA and PCP sheath.

EMC screen
Oil-resistant
Flame-retardant
Outdoor & humid
Order designation
MGM 112 Type 331 3×70+1×35
Outer Ø min
50.4 mm
Outer Ø max
54.8 mm
Weight ≈
5,740 kg/km
Min. bend R
329 mm
Check against my drumAll sizes (9)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
1.9/3.3 kV
1,900/3,300 V AC · 7.5 kV test
Conductor temp.
+90 °C max.
+250 °C short-circuit (5 s)
Ambient temp.
−25…+80 °C
Flexing (−40…+80 °C fixed)
Bending radius
6–8 × OD
6 × OD fixed · 8 × OD flexing
Construction
3S+1E + PWA
3 screened phase + 1 earth + steel PWA
Size range
16–150 mm²
4-core cradle lay · Class 5 SnCu

Typical values for this cable type, based on MGM 112 / BS 6708 Type 331 — confirmed in the datasheet and quotation for your order.

Application fit

Is MGM 112 Type 331 right for your machine?

MGM 112 Type 331 (BS 6708 Type 331) is the dedicated 4-core 1.9/3.3 kV pliable-wire-armoured cable combining individual copper/nylon phase screens with a full internal copper earth core for longwall face distribution and 3.3 kV flameproof switchgear.

Trailing & towing

Suitable

3.3 kV underground roadway distribution, stage-loader drives, crusher skids and mobile mine transformers.

Fixed installation

Suitable

Gassy mine gallery cleats, shaft inset distribution and 3.3 kV gate-end box interconnections.

Immersion & wet locations

Suitable

Heavy-duty polychloroprene (RS4/EM2) outer jacket resists wet coal-mine roadways, oil and abrasion.

Motorised monospiral reel

Not suitable

Pliable wire armour is built for roadway and machine interconnections, not fast crane reeling.

Use (N)TSCGEWÖU Reeling
Typical machines3.3 kV underground coal & longwall minesFlameproof transformer & gate-end linksArmoured face conveyor (AFC) drivesSubterranean haulage & pump stationsPotash, trona & hard-rock mining

Construction

Layer by layer

Shown: MGM 112 Type 331 3×70+1×35 — 3 EPR-insulated 70 mm² phase cores with individual copper/nylon braid screens + 1 unscreened 35 mm² earth core around a central elastomeric cradle, rubber inner bedding, galvanised steel pliable wire armour (PWA) and black PCP outer sheath.

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Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Tinned copper conductorFine-stranded annealed tinned copper wire (IEC 60228 / BS EN 60228 Class 5)IEC 60228 Class 5
2MV EPR core insulationCross-linked ethylene-propylene rubber compound Type GP8 (+90 °C rated for 1.9/3.3 kV)BS 7655-1.2 GP8 / MGM 112
3Individual phase screenComposite tinned-copper and nylon (polyamide) braided earth screen over each of the 3 phase coresMGM 112 / BS 6708 Type 331
4Elastomeric cradle centerExtruded rubber cradle separator keeping the 3 screened phase cores and 1 earth core symmetrically spacedMGM 112 / BS 6708
5Elastomeric inner beddingExtruded vulcanised rubber inner sheath over the 4-core cradle assemblyMGM 112 inner bedding
6Pliable wire armour (PWA)Stranded galvanised steel wire armour (PWA) providing high crush protection and fault-return conductanceMGM 112 / BS 6708 PWA
7Heavy-duty PCP outer sheathCross-linked polychloroprene (PCP / Type RS4 / EM2) extra-heavy-duty outer sheath, blackBS 7655-2.1 / IEC 60332-1-2

MGM 112 Type 331 Equal Earth (3×16+16 to 3×25+25)

3 individually screened 1.9/3.3 kV phase cores + 1 equal-size earth core around cradle + PWA + PCP sheath

MGM 112 Type 331 Reduced Earth (3×35+25 to 3×150+95)

3 individually screened 1.9/3.3 kV phase cores + 1 earth core around cradle + PWA + PCP sheath

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on MGM 112 / BS 6708 Type 331. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U
1.9/3.3 kV (1,900/3,300 V AC · Um 3.6 kV)
AC test voltage
7.5 kV AC (50 Hz, 5 min)
Conductor stranding
IEC 60228 / BS EN 60228 Class 5 tinned copper
Phase core screening
Individual tinned-copper/nylon braid over each of the 3 phase cores
Protective earth path
1 dedicated unscreened copper earth core + 3 phase screens + steel PWA

Thermal

Max. conductor temperature
+90 °C continuous operation
Short-circuit temperature
+250 °C max. (up to 5 s)
Temperature, flexing
−25 °C to +80 °C
Temperature, fixed
−40 °C to +80 °C

Mechanical

Min. bending radius, fixed
6 × overall diameter
Min. bending radius, moving
8 × overall diameter
Armour construction
Galvanised steel pliable wire armour (PWA) in multi-wire strands
Impact & crush duty
Extra-heavy underground roadway & rock-fall duty

Resistance

Flame retardance
IEC 60332-1-2 / BS EN 60332-1-2 underground mine flame test
Oil & hydraulic emulsion
EN 60811-404 mineral oil, grease & hydraulic fluid resistant
Water & mine dampness
Resistant to wet coal-mine roadways, sludge and grease
Abrasion & tear
Heavy-duty RS4/EM2 polychloroprene outer sheath

Reference standards

Primary specification
TTK MGM 112 Type 331 / BS 6708 Type 331
Compound standards
BS 7655-1.2 GP8 (EPR) & BS 7655-2.1 RS4 / EN 50363 EM2 (PCP)
Conductor standard
IEC 60228 / BS EN 60228 Class 5
RoHS & REACH
2011/65/EU (RoHS 2) & EC 1907/2006 compliant

Identification

Sheath colour
Black
Core identification
3 screened phase cores + 1 unscreened earth core in cradle lay
Sheath marking
TEBAOFLEX MGM 112 TYPE 331 [Size] 1900/3300V MINING CABLE
Customs tariff (HS)
8544.60 (insulated electric conductors > 1000 V)

Sizes

9 standard MGM 112 Type 331 configurations

Typical MGM 112 / BS 6708 Type 331 outer diameter limits, copper content and cable weight.

Dimensions & weights
Order designationCores × mm²AWG ≈Outer Ø min
mm		Outer Ø max
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
mm		Enquiry
MGM 112 Type 331 — 3 Screened Phase + Equal Earth Core (16–25 mm², 1.9/3.3 kV)
MGM 112 Type 331 3×16+1×163×16+1×16635.038.07302,450228
MGM 112 Type 331 3×25+1×253×25+1×25438.842.21,0863,120253
MGM 112 Type 331 — 3 Screened Phase + Reduced Earth Core (25–150 mm², 1.9/3.3 kV)
MGM 112 Type 331 3×25+1×163×25+1×16438.541.81,0003,040251
MGM 112 Type 331 3×35+1×253×35+1×25241.845.41,3803,720272
MGM 112 Type 331 3×50+1×253×50+1×25146.050.01,8304,590300
MGM 112 Type 331 3×70+1×353×70+1×352/050.454.82,5205,740329
MGM 112 Type 331 3×95+1×503×95+1×503/055.460.23,4207,120361
MGM 112 Type 331 3×120+1×703×120+1×704/059.664.84,3608,490389
MGM 112 Type 331 3×150+1×953×150+1×95300 kcmil63.969.55,49010,120417
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Dimensions and weights are typical values per MGM 112 / BS 6708 Type 331. Minimum fixed bending radius shown is 6 × OD.

Reel check

Will it fit your machine?

A first screen using datasheet values. Engineering confirms drum geometry, acceleration and tension with your quotation.

Check results

Drum core 300 mm is below 658 mmUse a larger drum core or a smaller cable size
Minimum bending radius
329 mm
Min. drum core diameter
≈ 658 mm
Cable weight on drum
287.0 kg
Copper content
126.0 kg
Indicative only: based on the datasheet outer diameter and 6 × OD bending radius. Current derating for wound layers per DIN VDE 0298-4 is assessed separately.

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
AC voltage test7.5 kV AC (50 Hz)Every manufactured length
Conductor DC resistanceIEC 60228 Class 5 (tinned copper)Every manufactured length
Sample tests
Vertical flame propagationIEC 60332-1-2 / EN 60332-1-2Per production batch
Insulation & sheath elastomer physical propertiesMGM 112 / BS 6708 Type 331Type approval

Inspection certificate

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

Product approvals

MGM 112 / BS 6708 Type 331CE · RoHS 2 (2011/65/EU) · REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX MGM 112 TYPE 331 [Size] 1900/3300 V MINING CABLE
Delivery form
Export wooden drums or coils, cut-to-length on request
Packaging
Heat-treated ISPM-15 timber drums with sealed cable ends
Conductor / sheath options
Custom core counts, pilot cores or sheath colours on request

Technical documents

Downloads

PDFMGM 112 Type 331 Cable – technical datasheet9 sizes · construction, technical data, approvalsXLSXMGM 112 Type 331 spec data (Excel)All 9 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.

How does MGM 112 Type 331 differ from MGM 112 Type 321?
Both Type 331 and Type 321 under specification MGM 112 are 4-core (3 phase + 1 earth) 1.9/3.3 kV pliable-wire-armoured underground mining cables. In MGM 112 Type 331 (matching BS 6708 Type 331), each of the three 1.9/3.3 kV phase cores is individually surrounded by a composite tinned-copper/nylon earth screen, whereas MGM 112 Type 321 has four unscreened EPR cores inside the collective pliable wire armour.
Why does Type 331 include both individual phase screens and a fourth earth conductor?
The individual copper/nylon screens over the three phase cores guarantee that any cable crushing or rock penetration triggers an earth-fault trip before a phase-to-phase short circuit can develop, while the dedicated fourth copper earth core and the outer galvanised steel pliable wire armour provide a low-impedance earth-fault return path.
What is the difference between MGM 112 Type 331 (1.9/3.3 kV) and MGM 112 Type 211 (660/1,100 V)?
Both share the identical 4-core layout (3 individually copper/nylon-screened phase cores + 1 unscreened earth core around a central rubber cradle + inner bedding + PWA + PCP jacket), but Type 331 has thicker MV GP8 EPR insulation rated for 1.9/3.3 kV (7.5 kV test) versus 660/1,100 V (3.0 kV test) on Type 211.
Can MGM 112 Type 331 be terminated into standard BS 6708 3.3 kV flameproof glands and couplers?
Yes. Dimensional tolerances over the inner bedding and outer polychloroprene sheath are controlled to fit standard BS 6708 / TTK 3.3 kV flameproof mining glands and bolted couplers.

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MGM 112 Type 331 Cable

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Reel & motion:
- Reel type: 
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- Exposure (outdoor, water, oil, abrasion): 
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