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Product

British Coal MGM 109 / MGM 118 & PN-G-90006 Underground Mining Power CablesMGM 109 Type 3123 · BS 67081.9/3.3 kV · Individually Cu-ScreenedDouble Wire Armour (DWA ≥ 75 %)

MGM 109 Type 3123 CableBritish Coal MGM 109 / BS 6708 1.9/3.3 kV 3-core individually copper-screened DWA mining

MGM 109 Type 3123 Cable is the highest-integrity 1.9/3.3 kV underground mining roadway and shaft feeder cable to British Coal Specification MGM 109 and BS 6708, combining three Class 2 tinned copper phase conductors (16 mm² to 185 mm²), 90 °C Type GP4 EPR

Flame-retardant
EMC screen
Oil-resistant
Water-resistant
Order designation
MGM 109 Type 3123 3C × 50 mm² Cu-Scr DWA
Outer Ø ≈
43.2 mm
Copper weight
1,690 kg/km
Total weight ≈
4,280 kg/km
Min. bend R (fixed)
518 mm
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Specification
MGM 109 Type
3.3 kV · Screened (1) · DWA (2) · 3C (3)
Rated voltage
1.9/3.3 kV AC
6.5 kV AC / 5 min dielectric test
Phase screens
Individual Cu
Eliminates phase-to-phase faults
Armouring
Double Wire
Counter-helical GSW/Cu (≥ 75 % earth)
Insulation
Type GP4 EPR
90 °C cross-linked rubber BS 7655
Outer sheath
Mining FR-PVC
Heavy-duty flame-retardant Black PVC

Typical values for this cable type, based on British Coal MGM 109 / BS 6708 (Type 3123 1.9/3.3 kV Screened DWA) — confirmed in the datasheet and quotation for your order.

Application fit

Is MGM 109 Type 3123 right for your machine?

Engineered for 3.3 kV longwall coal-face supply gates, vertical mine shafts, incline drifts, and sensitive earth-leakage protected underground networks where both individual core screening and

Fixed installation

Suitable

Counter-helical Double Wire Armour supports vertical shaft suspension and resists severe roadway rock-fall crush.

Switchgear & control cabinet wiring

Suitable

Individual copper phase screens convert any internal insulation damage into a low-energy earth fault before a phase-to-phase arc can

Immersion & wet locations

Suitable

PVC inner bedding, bitumen/compound anti-corrosion treatment, and thick outer PVC jacket resist corrosive mine water.

Energy chain / drag chain

Not suitable

Fixed double-armoured 3.3 kV shaft/roadway feeder.

MGM 109 Type 3023
Typical machines3.3 kV longwall gate-road substationsVertical mine shaft & drift feedersFiredamp (methane) Group I gassy coal seamsHeavy armoured conveyor & shearer supply

Construction

Layer by layer

Three circular stranded tinned copper conductors (BS EN 60228 Class 2, 16 to 185 mm²), 90 °C Type GP4 EPR insulation, individual helically

123456
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Stranded tinned copper conductorBS EN 60228 Class 2 circular stranded tinned annealed copper (16 to 185 mm²)MGM 109 / BS EN 60228
2Type GP4 EPR rubber insulation (90 °C)Cross-linked ethylene-propylene elastomer Type GP4 per BS 7655-1.2MGM 109 / BS 7655-1.2
3Individual tinned copper tape phaseHelically lapped tinned annealed copper tape over each insulated core in contact withMGM 109 Type 3123
4Extruded PVC inner beddingFlame-retardant extruded PVC inner beddingMGM 109
5Double Wire Armour (DWA ≥ 75 %Two counter-helical layers of galvanized steel wires (+ tinned Cu wires) with jute/tapeMGM 109 / BS 6708
6Mining flame-retardant PVC outer sheathHeavy-duty abrasion- and flame-retardant PVC outer sheath, BlackMGM 109 / BS 7655

MGM 109 Type 3123 Medium Feeders (3C × 16, 25, 35, 50 mm²)

1.9/3.3 kV individually copper-screened DWA feeders for auxiliary transformers and stage loaders.

MGM 109 Type 3123 Main Longwall Feeders (3C × 70, 95, 120, 150, 185 mm²)

High-capacity 3.3 kV screened DWA trunk cables with composite Cu/GSW armour.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on British Coal MGM 109 / BS 6708 (Type 3123 1.9/3.3 kV Screened DWA). Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U
1.9/3.3 kV AC (1900/3300 V)
AC dielectric test voltage
6,500 V AC for 5 minutes
Max. conductor operating temp.
+90 °C continuous · +250 °C short-circuit
Combined screen + armour conductance
≥ 75 % of the conductance of one phase

Thermal

Operating temperature range
-15 °C to +90 °C (fixed installation)
Minimum installation temp.
0 °C

Mechanical

Min. bending radius
12 × overall diameter (D) for DWA MV mining
Vertical shaft suspension
Non-twisting counter-helical Double Wire

Resistance

Flame retardance
BS EN 60332-1-2 & British Coal underground
Short-circuit arc containment
Individual Cu core screens force

Reference standards

Primary specification
British Coal Specification MGM 109 (Type
Material standards
BS EN 60228 · BS 7655-1.2 (GP4 EPR) · BS EN

Identification

Core identification
3-Core: Brown, Black, Grey (or numbered 1
Outer sheath colour
Black embossed 'MGM 109 TYPE 3123 1900/3300V'

Sizes

6 standard configurations (MGM 109 Type 3123)

Nominal dimensions, copper weights, DC resistance and current ratings for MGM 109 Type 3123 per British Coal MGM 109 / BS 6708 (Type 3123 1.9/3.3 kV Screened

Dimensions & weights
Order designationCores × SizeMain cross-sectionOuter Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard MGM 109 Type 3123 configurations
MGM 109 Type 3123 3C × 25 mm² Cu-Scr DWA3 × 25 mm²25.0 mm²36.89202,950442
MGM 109 Type 3123 3C × 50 mm² Cu-Scr DWA3 × 50 mm²50.0 mm²43.21,6904,280518
MGM 109 Type 3123 3C × 70 mm² Cu-Scr DWA3 × 70 mm²70.0 mm²47.62,3405,360571
MGM 109 Type 3123 3C × 95 mm² Cu-Scr DWA3 × 95 mm²95.0 mm²52.43,1806,690629
MGM 109 Type 3123 3C × 120 mm² Cu-Scr DWA3 × 120 mm²120.0 mm²56.83,9807,940682
MGM 109 Type 3123 3C × 185 mm² Cu-Scr DWA3 × 185 mm²185.0 mm²65.46,08010,980785
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per British Coal MGM 109 / BS 6708 (Type 3123 1.9/3.3 kV Screened DWA).

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
6.5 kV AC dielectric & insulation resistance6,500 V AC for 5 min core-to-screen & core-to-armour100 % of drums
Phase, Cu screen & DWA DC resistanceCombined metallic earth conductance ≥ 75 % of one phase core100 % of drums
Sample tests
GP4 EPR hot-set & armour wire torsion/zinc testBS 7655-1.2 & BS EN 10257-1 compliancePer production batch
Mining impact crush & flame propagation testPass MGM 109 / BS 6708 roadway qualificationType approval

Inspection certificate

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

Product approvals

British Coal MGM 109 Type 3123BS 6708CE / UKCA

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX MGM 109 TYPE 3123 1900/3300V
Delivery form
Non-returnable timber drums or heavy export
Standard drum lengths
250 m · 500 m · 1000 m · custom cut lengths
MOQ
100 m (stock variants) · 500 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFMGM 109 Type 3123 Cable – technical datasheet6 sizes · construction, technical data, approvalsXLSXMGM 109 Type 3123 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.

What does the designation 'Type 3123' mean in British Coal MGM 109?
In the 4-digit MGM 109 code '3123': '3' = 1.9/3.3 kV rated voltage; '1' = individually copper-tape screened phase cores; '2' = Double Wire Armour (DWA); and '3' = 3 power cores. Each production drum undergoes 100 % conductor DC resistance verification, insulation thickness
Why are individual copper phase screens ('1') specified on Type 3123 instead of unscreened Type 3023?
If a rock fall or roof bolt crushes a 3.3 kV cable in a gassy underground coal roadway, individual copper tape screens surrounding each phase ensure that any penetration immediately contacts an earthed screen, tripping sensitive earth-leakage relays (typically ≤ 80–500 mA) before a high-energy phase-to-phase arc can occur.
How do Type 3123, Type 3023, and Type 3013 compare?
All three are 1.9/3.3 kV 3-core MGM 109 mining feeder cables: Type 3123 is individually copper-screened with Double Wire Armour (DWA); Type 3023 is unscreened with Double Wire Armour (DWA); and Type 3013 is unscreened with Single Wire Armour (SWA). Each production drum undergoes
Is Type 3123 compatible with BS 6708 3.3 kV flameproof cable couplers?
Yes. MGM 109 Type 3123 is dimensionally matched to standard 300 A / 400 A 3.3 kV BS 6708 Group I flameproof half-couplers and elastomeric/resin-filled coupler glands. Each production drum undergoes 100 % conductor DC resistance verification, insulation thickness gauging, and high-voltage AC or

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MGM 109 Type 3123 Cable

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