Application & Underground Mining Service
MGM 112 Type E2, Type E4, and Type E5 are 660/1100 V unscreened, pliable-armoured elastomeric cables manufactured to Turkish TTK MGM 112/1984, featuring Class 5 tinned copper conductors, EPR insulation, 7-wire galvanized steel rope armour, and heavy polychloroprene sheathing for underground coal mines.
Armoured Face Conveyors & Pumps
Type E4 (4×2.5 mm² at 28 A up to 4×150 mm² at 320 A) feeds three-phase + earth armored face conveyors, stage loaders, hydraulic power packs, and district dewatering pumps.
Pilot-Interlock & Lighting Circuits
Type E5 (5×4 to 5×16 mm²) adds an integral fifth core for remote pilot-interlock or neutral duty, while Type E2 (2×4 mm²) powers heavy-duty 2-wire lighting and solenoid feeders.
Elastomeric Cradle Core Support
Four-core and five-core assemblies are laid around a shaped central elastomeric cradle so cores maintain geometric spacing under impact and repetitive bending around roadway turns.
Pliable Armour Protection Principle: In unscreened Type E2, E4, and E5 cables, the concentric 7-wire galvanized steel rope armour acts as a full-coverage grounded mechanical shield surrounding the rubber bedding.
Cable Construction & Layer Anatomy
Constructed to MGM 112/1984 for semi-mobile underground mining machinery, Type E2, E4, and E5 combine corrosion-resistant Class 5 tinned copper strands, heat-resistant EPR core insulation, a central rubber cradle, and flexible 7-strand galvanized steel armour under a flame-retardant PCP jacket.
| Layer / Component | Material & MGM 112/1984 Engineering Specification |
|---|---|
| 1. Conductor | Electrolytic flexible stranded tinned copper wire per IEC 60228 Class 5 (0.25 mm to 0.50 mm elementary wire gauge depending on cross-section). |
| 2. Core Insulation | Ethylene Propylene Rubber (EPR) thermoset compound (1.0 mm wall on 2×4 mm²; 1.4 mm to 2.3 mm wall across 4-core and 5-core sizes). |
| 3. Central Elastomeric Cradle | Shaped rubber center cradle separating insulated cores in 4-core (Type E4) and 5-core (Type E5) formations to absorb compressive impact (omitted in 2-core Type E2). |
| 4. Inner Sheath | Extruded vulcanized rubber inner bedding (2.0 mm to 5.0 mm radial thickness) providing a resilient seat under the steel wire strands. |
| 5. Pliable Steel Rope Armour | Helical layer of 7-wire galvanized steel pliable strands (7/0.45 mm, 7/0.50 mm, 7/0.70 mm, 7/0.90 mm, or 7/1.25 mm) for crush resistance and reeling/relocation flexibility. |
| 6. Outer Sheath | Heavy-duty black chloroprene rubber (PCP) compound (2.5 mm to 7.3 mm radial thickness) resistant to oil, abrasion, mine water, and flame spread. |
MGM 112 Type E4 Cross-Section (4-Core Shown): Four unscreened Class 5 tinned copper EPR cores laid around a central elastomeric cradle, rubber inner bedding, 7-wire pliable GSW strand armour, and black PCP outer sheath.
Technical Characteristics
All 17 cross-sections in the Turkish TTK MGM 112 Type E2, E4, and E5 family undergo 3 kV AC routine dielectric testing and are engineered for a 10 x OD minimum bending radius during underground roadway installation and periodic coal-face equipment advancement.
| Parameter | MGM 112/1984 Rated Value |
|---|---|
| Reference Standard | Turkish Hard Coal Enterprises TTK MGM 112/1984 & IEC 60228 Class 5 |
| Rated Voltage (Uo/U) | 660 / 1100 V AC |
| Routine Test Voltage | 3000 V (3 kV) AC |
| Type Designations | Type E2 (2-Core: 2×4 mm²) | Type E4 (4-Core: 4×2.5–4×150 mm²) | Type E5 (5-Core: 5×4–5×16 mm²) |
| Continuous Current (25°C) | 28 A (2.5 / 4 mm²) up to 320 A (4×150 mm²) at 25°C ambient |
| Minimum Bending Radius | 10 x maximum overall cable diameter (264 mm to 953 mm) |
| Max. Conductor DC Resistance | 8.21 Ω/km (2.5 mm²) down to 0.132 Ω/km (150 mm²) at 20°C |
| Environmental Properties | Flame-retardant, oil/emulsion resistant, tear and impact resistant PCP outer jacket |
Dimensional, Ampacity & Resistance Specifications
The complete TTK MGM 112/1984 dimensional and electrical specifications for Type E2 (2-core), Type E5 (5-core), and Type E4 (4-core, 2.5–150 mm²) are organized in the two engineering tables below, including Class 5 stranding, 7-wire pliable armour gauges, calibrated sheath thicknesses, and 25°C ampacities.
1. MGM 112 Type E2 (2-Core) & Type E5 (5-Core) — Pliable Armoured 660/1100V Schedule
| Type & Size | Cond. Strand (n/mm) | Cond. Dia. (mm) | EPR Wall (mm) | Inner Sheath (mm) | Pliable Armour | Outer Sheath (mm) | Min. OD (mm) | Max. OD (mm) | Min. Bend (mm) | Current 25°C (A) | Cond. R (Ω/km) | Cu Wt. (kg/km) | Cable Wt. (kg/km) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type E2 — 2×4 | 56/0.30 | 2.60 | 1.0 | 2.0 | 7 / 0.45 | 2.5 | 23.9 | 26.4 | 264 | 28 | 5.09 | 80 | 950 |
| Type E5 — 5×4 | 56/0.30 | 2.60 | 1.4 | 2.0 | 7 / 0.45 | 2.5 | 31.0 | 32.3 | 323 | 28 | 5.09 | 200 | 1750 |
| Type E5 — 5×6 | 84/0.30 | 3.30 | 1.5 | 2.0 | 7 / 0.50 | 3.8 | 38.0 | 40.0 | 400 | 46 | 3.39 | 290 | 2900 |
| Type E5 — 5×10 | 80/0.40 | 4.40 | 1.5 | 2.5 | 7 / 0.70 | 3.8 | 42.4 | 45.0 | 450 | 63 | 1.95 | 480 | 3900 |
| Type E5 — 5×16 | 126/0.40 | 5.50 | 1.5 | 2.5 | 7 / 0.70 | 3.8 | 46.5 | 48.9 | 489 | 85 | 1.24 | 770 | 4800 |
2. MGM 112 Type E4 (4-Core, 4×2.5 to 4×150 mm²) — Pliable Armoured 660/1100V Schedule
| Cable Size | Cond. Strand (n/mm) | Cond. Dia. (mm) | EPR Wall (mm) | Inner Sheath (mm) | Pliable Armour | Outer Sheath (mm) | Min. OD (mm) | Max. OD (mm) | Min. Bend (mm) | Current 25°C (A) | Cond. R (Ω/km) | Cu Wt. (kg/km) | Cable Wt. (kg/km) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4×2.5 | 50/0.25 | 2.10 | 1.4 | 2.0 | 7 / 0.45 | 2.5 | 26.2 | 28.6 | 286 | 28 | 8.21 | 100 | 1280 |
| 4×4 | 56/0.30 | 2.70 | 1.4 | 2.0 | 7 / 0.45 | 2.5 | 27.7 | 30.1 | 301 | 37 | 5.09 | 160 | 1450 |
| 4×6 | 84/0.30 | 3.30 | 1.5 | 2.5 | 7 / 0.70 | 3.8 | 36.7 | 38.8 | 388 | 46 | 3.39 | 240 | 2450 |
| 4×10 | 80/0.40 | 4.40 | 1.5 | 2.5 | 7 / 0.70 | 3.8 | 38.8 | 41.0 | 410 | 63 | 1.95 | 390 | 2900 |
| 4×16 | 126/0.40 | 5.50 | 1.5 | 2.5 | 7 / 0.70 | 3.8 | 41.5 | 44.0 | 440 | 85 | 1.24 | 620 | 3600 |
| 4×25 | 196/0.40 | 7.10 | 1.6 | 2.5 | 7 / 0.70 | 4.3 | 46.1 | 49.8 | 498 | 110 | 0.795 | 960 | 4450 |
| 4×35 | 276/0.40 | 8.40 | 1.6 | 2.5 | 7 / 0.90 | 4.7 | 51.0 | 56.1 | 561 | 135 | 0.565 | 1350 | 5650 |
| 4×50 | 396/0.40 | 10.10 | 1.7 | 2.5 | 7 / 0.90 | 5.1 | 56.1 | 61.8 | 618 | 170 | 0.393 | 1920 | 7350 |
| 4×70 | 360/0.50 | 11.90 | 1.7 | 3.8 | 7 / 0.90 | 5.7 | 64.8 | 71.4 | 714 | 205 | 0.277 | 2690 | 9500 |
| 4×95 | 475/0.50 | 13.90 | 2.0 | 3.8 | 7 / 0.90 | 6.3 | 74.9 | 78.6 | 786 | 250 | 0.210 | 3650 | 10950 |
| 4×120 | 608/0.50 | 15.80 | 2.2 | 5.0 | 7 / 1.25 | 6.8 | 83.8 | 89.0 | 890 | 295 | 0.164 | 4610 | 15600 |
| 4×150 | 756/0.50 | 17.00 | 2.3 | 5.0 | 7 / 1.25 | 7.3 | 91.4 | 95.3 | 953 | 320 | 0.132 | 5760 | 18500 |
4x120 mm², the heavy-duty PCP outer sheath thickness is calibrated to 6.8 mm (consistent with the 83.8–89.0 mm overall diameter progression between 4x95 at 6.3 mm and 4x150 at 7.3 mm).660/1100V Underground Mining Cable Comparison
Selecting between pliable-armoured MGM 112 Type E2, Type E4, and Type E5 elastomeric cables versus rigid MGM 109 PVC cables depends on whether your 660/1100 V underground circuit feeds movable coal-face machinery requiring repeatable bending flexibility or stationary roadway distribution boards.
| Cable Designation | Core Architecture, Flexibility & Underground Mining Application |
|---|---|
| MGM 112 Type E4 (This Page) | 660/1100 V | 4 Unscreened EPR Cores (2.5–150 mm²) + Rubber Cradle + Pliable 7-wire GSW rope armour + PCP sheath for semi-mobile three-phase + earth conveyors and pumps. |
| MGM 112 Type E5 (This Page) | 660/1100 V | 5 Unscreened EPR Cores (4–16 mm²) + Rubber Cradle + Pliable 7-wire GSW rope armour + PCP sheath for 3P+E+Pilot interlocked gate-end auxiliary drives. |
| MGM 112 Type E2 (This Page) | 660/1100 V | 2 Unscreened EPR Cores (2×4 mm²) + Pliable 7-wire GSW rope armour + PCP sheath for ruggedized single-phase lighting and control feeders. |
| MGM 109 Type 1012 / 1013 / 1014 | 600/1000 V | 2, 3, or 4 Class 1/2 Bare Cu PVC Cores + Rigid Single GSW Armour (SWA) + PVC sheath for stationary roadway distribution only. |
Frequently Asked Questions (FAQ)
Below are practical engineering answers to frequent underground hard-coal mining procurement questions covering Turkish TTK MGM 112 Type E2, Type E4, and Type E5 elastomeric type codes, semi-mobile roadway dragging versus dynamic reeling limits, flameproof pliable-wire-armour gland selection, and individually screened 660/1100V alternatives.
What does the “E” designation mean in MGM 112 Type E2, Type E4, and Type E5?
Within TTK MGM 112/1984, Type E denotes Elastomeric (EPR-insulated, PCP-sheathed) unscreened pliable-armoured low-voltage cables, while the trailing digit (2, 4, or 5) specifies the number of equal cross-section insulated cores.
Can MGM 112 Type E4 or Type E5 be used on continuous reeling drums?
No. Pliable wire armoured (PWA) cables are engineered for semi-mobile service — periodic dragging, coiling, and relocation with advancing coal-face machinery — not high-speed dynamic reeling. For dynamic reeling, select TEBAOFLEX unarmoured elastomeric trailing/reeling cables.
What type of cable glands fit MGM 112 Type E2, E4, and E5?
Use flameproof (Ex d) mining glands equipped with pliable-wire-armour clamping cones sized to the Min/Max OD and 7-strand GSW armour diameter (7/0.45 mm up to 7/1.25 mm).
Are individually screened 660/1100V pliable armoured cables also available?
Yes. Where coal-mine regulations mandate individual phase-core copper/nylon screening on 660/1100V coal-face feeders, TEBAOFLEX supplies screened pliable-armoured constructions to both TTK MGM 112 and BS 6708.
Need MGM 112 Type E2, E4 or E5 Pliable Armoured Mining Cables?
Send your required sizes (2×4, 4×2.5–150, or 5×4–16 mm²) and delivery schedule for direct factory pricing and full test documentation.
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