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Heavy-duty rubber cables (NSSHÖU)MGM 111 · BS 6708 Type 21U0/U 640/1,100 V4-Core Cradle · PWA

MGM 111 Type 21 Cable640/1,100 V (660/1,100 V) 4-core unscreened pliable-wire-armoured LV mining rubber cable

Low-voltage 640/1,100 V (660/1,100 V) 4-core underground mining and quarry cable to MGM 111 and BS 6708 Type 21 with four Class 5 tinned copper EPR-insulated cores (3 phase + 1 earth) around a rubber cradle, inner bedding, steel PWA and PCP outer sheath.

EMC screen

Oil-resistant

Flame-retardant

Outdoor & humid

Cores × cross-section

Order designation: MGM 111 Type 21 3×35+1×25
Outer Ø min: 35.3 mm
Outer Ø max: 38.4 mm
Weight ≈: 3,050 kg/km
Min. bend R: 230 mm

Check against my drum All sizes (12)

Request a quote Datasheet WhatsApp

Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Rated voltage: 640/1,100 V
Conductor temp.: +90 °C max.
Ambient temp.: −25…+80 °C
Bending radius: 6–8 × OD
Construction: 4C + PWA
Size range: 2.5–150 mm²

Typical values for this cable type, based on MGM 111 / BS 6708 Type 21 — confirmed in the datasheet and quotation for your order.

Application fit

Is MGM 111 Type 21 right for your machine?

MGM 111 Type 21 is the workhorse 640/1,100 V 4-core pliable-wire-armoured cable for underground mining roadways, gate-end interconnections, haulage winches, ventilation fans and dewatering pumps where collective steel wire armour provides both mechanical protection and earth continuity.

Trailing & towing

Suitable

Semi-mobile underground mining machinery, gate-end box jumpers, pumps, fans and stage conveyors.

Fixed installation

Suitable

Underground mine roadway cleats, drift conveyors, substation distribution and quarry plant.

Immersion & wet locations

Suitable

Heavy-duty polychloroprene (PCP) outer sheath resists wet coal-mine roadways, oil and rock abrasion.

Motorised monospiral reel

Not suitable

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

Use NSHTÖU Reeling

Typical machinesUnderground coal & hard-rock minesMine ventilation fans & booster pumpsGate-end switchgear & conveyor drivesQuarry crushing & screening plantTunnelling & shaft utility distribution

Construction

Layer by layer

Shown: MGM 111 Type 21 3×35+1×25 — 4 EPR-insulated Class 5 tinned copper cores (3 phase + 1 earth) laid around a central elastomeric cradle, rubber inner sheath, galvanised steel pliable wire armour (PWA) and black PCP outer sheath.

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Tinned copper conductor	Fine-stranded annealed tinned copper wire (IEC 60228 / BS EN 60228 Class 5)IEC 60228 Class 5
2	EPR core insulation	Cross-linked ethylene-propylene rubber compound Type GP8 (+90 °C rated)BS 7655-1.2 GP8 / MGM 111
3	Elastomeric cradle center	Extruded rubber cradle separator keeping the 4 cores symmetrically spaced under crush loadMGM 111 / BS 6708 Type 21
4	Elastomeric inner bedding	Extruded vulcanised rubber inner sheath consolidating the 4-core cradle assemblyMGM 111 inner bedding
5	Pliable wire armour (PWA)	Stranded galvanised steel wire armour (PWA) providing high crush protection and fault-return conductanceMGM 111 / BS 6708 PWA
6	Heavy-duty PCP outer sheath	Cross-linked polychloroprene (PCP / Type RS4 / EM2) extra-heavy-duty outer sheath, blackBS 7655-2.1 / IEC 60332-1-2

MGM 111 Type 21 Equal Cores (4×2.5 to 4×25)

4 equal-cross-section EPR cores (3 phase + 1 earth) with central cradle, inner bedding, PWA and PCP sheath

MGM 111 Type 21 Reduced Earth (3×35+25 to 3×150+95)

3 full-size EPR phase cores + 1 earth core + central cradle, inner bedding, PWA and PCP sheath

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on MGM 111 / BS 6708 Type 21. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U: 640/1,100 V (660/1,100 V AC · 1.1 kV mining system)
AC test voltage: 3000 V AC (50 Hz, 5 min)
Conductor stranding: IEC 60228 / BS EN 60228 Class 5 tinned copper
Core configuration: 4 unscreened EPR cores (3 phase + 1 protective earth) around cradle
Armour conductance: Galvanised steel PWA supplements the internal copper earth core

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 type: Pliable wire armour (PWA) of stranded galvanised steel wires
Crush & impact protection: Central rubber cradle + inner bedding + steel PWA

Resistance

Flame retardance: IEC 60332-1-2 / BS EN 60332-1-2 self-extinguishing
Oil & hydraulic fluids: EN 60811-404 mineral oil & hydraulic emulsion resistant (PCP)
Mine water & humidity: Resistant to wet coal-mine roadways, sludge and grease
Abrasion & tear: Heavy-duty RS4/EM2 polychloroprene outer jacket

Reference standards

Primary specification: TTK MGM 111 Type 21 / BS 6708 Type 21
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: Colour-coded or numbered phase cores + earth core
Sheath marking: TEBAOFLEX MGM 111 TYPE 21 [Size] 640/1100V MINING CABLE
Customs tariff (HS): 8544.49 (insulated conductors ≤ 1000 V / 1100 V)

Sizes

12 standard MGM 111 Type 21 configurations

Typical MGM 111 / BS 6708 Type 21 outer diameter limits, copper content and cable weight.

Dimensions & weights
Order designation	Cores × mm²	AWG ≈	Outer Ø min mm	Outer Ø max mm	Copper kg/km	Weight ≈ kg/km	Min. bend R mm
MGM 111 Type 21 — 4 Equal Cores (2.5–25 mm², 640/1,100 V)
MGM 111 Type 21 4×2.5	4×2.5	14	17.7	19.2	96	610	115
MGM 111 Type 21 4×4	4×4	12	19.3	21.0	154	760	126
MGM 111 Type 21 4×6	4×6	10	21.2	23.0	230	940	138
MGM 111 Type 21 4×10	4×10	8	24.7	26.8	384	1,340	161
MGM 111 Type 21 4×16	4×16	6	27.8	30.2	614	1,790	181
MGM 111 Type 21 4×25	4×25	4	32.2	35.0	960	2,490	210
MGM 111 Type 21 — 3 Phase + 1 Earth Core (35–150 mm², 640/1,100 V)
MGM 111 Type 21 3×35+1×25	3×35+1×25	2	35.3	38.4	1,248	3,050	230
MGM 111 Type 21 3×50+1×25	3×50+1×25	1	39.4	42.8	1,680	3,840	257
MGM 111 Type 21 3×70+1×35	3×70+1×35	2/0	43.7	47.5	2,352	4,920	285
MGM 111 Type 21 3×95+1×50	3×95+1×50	3/0	48.6	52.8	3,216	6,210	317
MGM 111 Type 21 3×120+1×70	3×120+1×70	4/0	52.6	57.2	4,128	7,490	343
MGM 111 Type 21 3×150+1×95	3×150+1×95	300 kcmil	57.0	62.0	5,232	9,020	372

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 111 / BS 6708 Type 21. Minimum fixed bending radius shown is 6 × OD.

Electrical & current ratings
Cross-section mm²	AWG ≈	Max. DC resistance 20 °C, Ω/km	1-core in air 30 °C, A	3–4 core in air 30 °C, A
2.5	14	8.21	30	25
4	12	5.09	41	34
6	10	3.39	53	44
10	8	1.95	74	61
16	6	1.24	99	82
25	4	0.795	131	108
35	2	0.565	162	135
50	1	0.393	202	168
70	2/0	0.277	250	207
95	3/0	0.21	301	250
120	4/0	0.164	352	292
150	300 kcmil	0.132	404	335

Current ratings at 30 °C ambient in free air per DIN VDE 0298-4 / EN 50565-1. Apply derating factors for elevated ambient temperature or reeling layer grouping.

Reel check

Will it fit your machine?

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

Cable sizeDrum core diameter (mm)

Cable length on drum (m)

Drum core 300 mm is below 460 mmUse a larger drum core or a smaller cable size

Minimum bending radius: 230 mm
Min. drum core diameter: ≈ 460 mm
Cable weight on drum: 152.5 kg
Copper content: 62.4 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.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
AC voltage test	3.0 kV AC (50 Hz)	Every manufactured length
Conductor DC resistance	IEC 60228 Class 5 (tinned copper)	Every manufactured length
Sample tests
Vertical flame propagation	IEC 60332-1-2 / EN 60332-1-2	Per production batch
Insulation & sheath elastomer physical properties	MGM 111 / BS 6708 Type 21	Type approval

Inspection certificate

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

Product approvals

MGM 111 / BS 6708 Type 21CE · 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 111 TYPE 21 [Size] 640/1100 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 111 Type 21 Cable – technical datasheet12 sizes · construction, technical data, approvals XLSXMGM 111 Type 21 spec data (Excel)All 12 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 111 Type 21 differ from MGM 112 Type 201 / 211?

Both are 640/1,100 V (660/1,100 V) pliable-wire-armoured LV mining cables aligned with BS 6708. MGM 111 Type 21 has four unscreened EPR-insulated cores (3 phase + 1 earth) laid around an elastomeric cradle inside the collective pliable wire armour, whereas MGM 112 Type 201 and Type 211 add individual copper/nylon composite earth screens over each of the three phase cores.

Why is MGM 111 Type 21 rated 640/1,100 V?

Underground coal and hard-rock mining distribution networks standardised on 1,100 V (1.1 kV phase-to-phase, 640 V phase-to-earth) under British BS 6708 and Turkish TTK MGM specifications to deliver higher power over long gallery runs than 400 V industrial systems.

Can MGM 111 Type 21 be used on 0.6/1 kV industrial systems?

Yes. Its 640/1,100 V rating and 3.0 kV AC test voltage exceed standard 0.6/1 kV industrial requirements, making it directly compatible with 400 V, 690 V and 1,000 V heavy industrial and tunnelling power systems.

When should I choose MGM 112 Type E2 / E4 / E5 instead of Type 21?

MGM 111 Type 21 is a 4-core (3P+E) cradle-separated power cable. If you require 2-core lighting/control (Type E2) or 5-core power-plus-pilot assemblies (Type E5) in an unscreened armoured 660/1,100 V construction, select MGM 112 Type E2 / E4 / E5.

Request a quote

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Your selection and application details are copied into the enquiry form below.

01Selected sizes

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02Reel & motion

Add your operating conditions here to include them in your enquiry.

Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

MGM 111 Type 21 Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:

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Datasheet Request a quote

MGM 111 Type 21 Cable640/1,100 V (660/1,100 V) 4-core unscreened pliable-wire-armoured LV mining rubber cable

Trailing & towing

Fixed installation

Immersion & wet locations

Motorised monospiral reel

MGM 111 Type 21 Equal Cores (4×2.5 to 4×25)

MGM 111 Type 21 Reduced Earth (3×35+25 to 3×150+95)

Electrical

Thermal

Mechanical

Resistance

Reference standards

Identification

Check results

Inspection certificate

Product approvals

Company certificates

01Selected sizes

02Reel & motion

03Message for our engineers

MGM 112 Type 201 / 211

MGM 112 Type E2 / E4 / E5

MGM 111 Type 320 / 321

MGM 112 Type 62 / 63 / 64