Application & Underground Mining Service
MGM 109 Type 1023 (3-core) and Type 1024 (4-core) are 600/1000 V double galvanized steel wire armoured (DWA) PVC cables complying with Turkish TTK MGM 109/1983 for fixed low-voltage power, auxiliary motor, and lighting circuits in deep shafts and gassy mines.
Shaft Auxiliary Power & Lighting Feeders
Sizes from 1.5 mm² to 10 mm² (18 A to 61 A) supply shaft-station lighting transformers, sump pumps, conveyor interlock motors, and ventilation damper actuators.
Double-Armour Impact & Tensile Shield
Two concentric layers of 0.9 mm or 1.25 mm galvanized steel round wires provide superior rockfall crush resistance and vertical hanging strength over single-armoured Type 1013/1014.
Low-Impedance Earth Continuity Path
High metallic cross-section of the twin galvanized steel wire armour maintains low earth-fault loop impedance (16.10 down to 2.44 Ω/km) across extended gallery runs.
Type Code Decoding (MGM 109 — 1023 / 1024): 1 = 600/1000 V class, 0 = unscreened cores, 2 = double-layer GSW armour (DWA), 3 or 4 = 3 cores (Type 1023) or 4 cores (Type 1024).
Cable Construction & Layer Anatomy
Built for permanent underground shaft and gallery installation under TTK MGM 109/1983, Type 1023 and Type 1024 surround compact PVC-insulated electrolytic copper conductors with an extruded PVC inner bedding, twin galvanized steel wire armour layers, and an abrasion-resistant special PVC outer sheath.
| Layer / Component | Material & MGM 109/1983 Engineering Specification |
|---|---|
| 1. Conductor | Electrolytic solid or circular stranded bare copper wire per IEC 60228 Class 1 or Class 2 (1.5 mm² to 10 mm²). |
| 2. Core Insulation | Flame-retardant PVC compound (0.8 mm to 1.0 mm radial wall) laid up in close contact (3 cores for Type 1023, 4 cores for Type 1024). |
| 3. Inner Bedding | Extruded PVC-based inner bedding compound (0.8 mm radial wall) forming a smooth cylindrical seat under the steel armour. |
| 4. Double GSW Armour (DWA) | Two concentric layers of galvanized steel round wires (0.9 mm or 1.25 mm wire gauge) with optional galvanized steel separator tape. |
| 5. Outer Sheath | Black special flame-retardant mining PVC compound (1.4 mm to 1.8 mm radial wall) formulated against moisture, mineral oil, and chemical attack. |
MGM 109 Type 1024 Cross-Section (4-Core Shown): Unscreened Class 1/2 bare copper PVC cores, extruded PVC inner bedding, double-layer GSW wire armour, and special PVC outer jacket.
Technical Characteristics
Every production drum of MGM 109 Type 1023 (3-core) and Type 1024 (4-core) is factory routine-tested at 3 kV AC and verified for both electrolytic copper conductor DC resistance and twin galvanized steel wire armour earth-return conductance across 1.5–10 mm².
| Parameter | MGM 109/1983 Rated Value |
|---|---|
| Reference Standard | Turkish Hard Coal Enterprises TTK MGM 109/1983 & IEC 60228 Class 1/2 |
| Rated Voltage (Uo/U) | 600 / 1000 V |
| Routine AC Test Voltage | 3 kV AC |
| Product Families | MGM 109 Type 1023 (3×1.5 to 3×10 mm²) & Type 1024 (4×1.5 to 4×10 mm²) |
| Continuous Current Rating | 18 A (1.5 mm²), 26 A (2.5 mm²), 34 A (4 mm²), 44 A (6 mm²), 61 A (10 mm²) at 25°C |
| Minimum Bending Radius | 10 x maximum overall cable diameter (185 mm to 305 mm) |
| Armour Separator Option | Optional galvanized steel binder tape between inner and outer wire armour layers |
| Extended Cross-Sections | Larger DWA low-voltage sizes (16 mm² to 95 mm²) manufactured to order upon request |
Dimensional, Weight & Electrical Specifications
The two verified TTK MGM 109/1983 schedules below present the calibrated PVC dimensional walls, twin GSW wire gauges, outer diameter limits, 10x OD bending radii, nominal cable/copper weights, 25°C current-carrying capacities, and DC resistances for 3-core MGM 109 Type 1023 and 4-core Type 1024.
MGM 109 Type 1023 (3-Core, 600/1000V) — Double-Armoured Dimensional & Electrical Schedule
| Cable Type | Insul. (mm) | Inner Sheath (mm) | Inner Dia. (mm) | DWA Wire Dia. (mm) | Outer Sheath (mm) | Min. OD (mm) | Max. OD (mm) | Min. Bend (mm) | Current 25°C (A) | Cond. R (Ω/km) | Armour R (Ω/km) | Cu Wt. (kg/km) | Cable Wt. (kg/km) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3×1.5 | 0.8 | 0.8 | 8.9 | 2 x 0.9 | 1.4 | 14.5 | 18.5 | 185 | 18 | 12.1 | 20.17 | 45 | 650 |
| 3×2.5 | 0.8 | 0.8 | 10.3 | 2 x 0.9 | 1.5 | 16.3 | 20.3 | 203 | 26 | 7.41 | 9.71 | 75 | 750 |
| 3×4 | 0.8 | 0.8 | 12.4 | 2 x 0.9 | 1.6 | 18.6 | 22.6 | 226 | 34 | 4.61 | 6.15 | 120 | 910 |
| 3×6 | 0.8 | 0.8 | 13.6 | 2 x 1.25 | 1.6 | 21.4 | 25.4 | 254 | 44 | 3.08 | 4.11 | 190 | 1300 |
| 3×10 | 0.8 | 0.8 | 16.5 | 2 x 1.25 | 1.7 | 26.5 | 30.5 | 305 | 61 | 1.83 | 2.44 | 310 | 1700 |
MGM 109 Type 1024 (4-Core, 600/1000V) — Double-Armoured Dimensional & Electrical Schedule
| Cable Type | Insul. (mm) | Inner Sheath (mm) | Inner Dia. (mm) | DWA Wire Dia. (mm) | Outer Sheath (mm) | Min. OD (mm) | Max. OD (mm) | Min. Bend (mm) | Current 25°C (A) | Cond. R (Ω/km) | Armour R (Ω/km) | Cu Wt. (kg/km) | Cable Wt. (kg/km) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4×1.5 | 0.8 | 0.8 | 9.6 | 2 x 0.9 | 1.5 | 15.5 | 19.5 | 195 | 18 | 12.1 | 16.10 | 60 | 750 |
| 4×2.5 | 0.8 | 0.8 | 11.1 | 2 x 0.9 | 1.5 | 17.1 | 21.1 | 211 | 26 | 7.41 | 9.71 | 100 | 850 |
| 4×4 | 0.8 | 0.8 | 13.4 | 2 x 1.25 | 1.6 | 21.2 | 25.2 | 252 | 34 | 4.61 | 6.15 | 160 | 1250 |
| 4×6 | 0.8 | 0.8 | 14.8 | 2 x 1.25 | 1.7 | 22.8 | 26.8 | 268 | 44 | 3.08 | 4.11 | 240 | 1480 |
| 4×10 | 1.0 | 0.8 | 18.1 | 2 x 1.25 | 1.8 | 26.2 | 30.2 | 302 | 61 | 1.83 | 2.44 | 385 | 1980 |
Selection Comparison: Double Armour (1023/1024) vs Single Armour (1012–1014)
Choosing between double-armoured TTK MGM 109 Type 1023 and Type 1024, single-armoured Type 1012/1013/1014, and pliable-armoured elastomeric cables depends on vertical mine shaft inclination angle, rockfall crush severity, equipment relocation frequency, and the required earth-fault loop conductance of the galvanized steel wire armour.
| MGM Low-Voltage Model | Armour Design, Cross-Section Scope & Recommended Underground Duty |
|---|---|
| MGM 109 Type 1023 / 1024 (DWA) | Double GSW wire armour (0.9–1.25 mm x 2 layers); 3C & 4C (1.5–10 mm² standard, larger on request) for vertical shafts, steep drifts, and high-crush zones. |
| MGM 109 Type 1012 / 1013 / 1014 (SWA) | Single GSW wire armour (0.9–2.0 mm); 2C, 3C & 4C (1.5–95 mm²) for fixed horizontal roadways, pump rooms, and surface washery plants. |
| MGM 111 Type 21 (Pliable EPR/PCP) | 600/1000 V Class 5 tinned copper, EPR cradle layup, pliable 7xd steel rope armour, and PCP jacket for semi-mobile crushers and stage loaders. |
| MGM 112 Type E2 / E4 / E5 | 660/1100 V Class 5 tinned copper, 2/4/5-core EPR/PCP pliable steel wire armoured cable where frequent roadway relocation is required. |
Frequently Asked Questions (FAQ)
The engineering answers below address common technical inquiries from underground hard-coal mining electrical designers regarding TTK MGM 109 Type 1023 and Type 1024 twin-armour protective earthing, custom 16 mm² to 95 mm² feeder cross-sections, and IEC 60228 Class 1 solid versus Class 2 stranded copper conductors.
Can the twin galvanized steel wire armour serve as the protective earth conductor?
In TTK MGM 109 systems, the double GSW armour provides a mechanically protected earth-continuity path (with verified Ω/km resistance), or in Type 1024 the fourth insulated copper core can serve as a dedicated full-size PE/PEN conductor alongside earthed armour.
Are Conductors supplied as solid Class 1 or stranded Class 2?
Per IEC 60228 and MGM 109/1983, 1.5–2.5 mm² may be supplied in Class 1 or Class 2, while 4–10 mm² (and all larger custom cross-sections) are supplied as Class 2 circular stranded copper for easier glanding and routing.
Can TEBAOFLEX manufacture Type 1023 and Type 1024 in 16 mm² to 95 mm²?
Yes. In addition to the cataloged 1.5–10 mm² shaft auxiliary sizes, we manufacture 3×16–3×95 mm² and 4×16–4×95 mm² double-armoured 0.6/1 kV PVC cables to MGM 109/1983.
Need MGM 109 Type 1023 or Type 1024 DWA Cables?
Provide your 3-core or 4-core cross-sections, drum lengths, and delivery port for a detailed factory quotation and technical submittal sheet.
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