Name: MGM 115 Type 14 660/1100V Screened Mining Cable for Drilling Machines
Brand: TEBAOFLEX

Product overview

MGM 115 Type 14 is a 660/1100 V flexible trailing cable with three screened phase cores, one unscreened pilot core and one unscreened earth core. It is built to the MGM 115 specification of the Turkish Hard Coal Enterprises MGM mining cable series, in five sizes from 3×25+2×16 to 3×95+2×50 mm².

The datasheet assigns Type 14 to drilling machines, in deep mines where explosive gases and dust can accumulate and in surface work. Tinned Class 5 copper, EPR insulation and a thick chloroprene sheath of 5.0 to 7.0 mm let the cable be dragged and reeled behind the machine, while the tinned copper and nylon braid around each phase core gives an earthed layer between a damaged conductor and the outside world.

Browse the MGM mining cable category for the other cables in the Turkish hard coal MGM series or download the MGM 115 Type 14 datasheet (PDF).

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Application & Features

Selection overview

A drilling machine moves along the face or the roadway every shift, so its supply cable is pulled, bent over rock edges and walked on by the crew and other machines. Type 14 answers that duty with fine-stranded tinned copper for repeated flexing, EPR cores that stay supple, and an outer chloroprene sheath that is noticeably thicker than on the lighter MGM 115 types. The datasheet also gives a maximum pulling tension for each size, from 638 kgf on 3×25+2×16 to 1446 kgf on 3×95+2×50, which is the figure to check against the cable reel or the haulage method.

The three phase screens are there for protection, not for signal quality. If a pick, a roof fall or a machine track cuts into a phase core, the conductor touches the earthed braid first and the earth-leakage relay trips before any live copper is exposed in a gassy atmosphere. The unscreened pilot core carries the pilot or earth-continuity circuit of the gate-end switch, and the separate earth core returns fault current to the supply.

Drilling machine supply660/1100 V trailing supply for mobile drilling machines underground and on the surface.
Screened phase coresTinned copper and nylon braid on each phase core so a mechanical fault becomes an earth fault first.
Separate pilot and earthOne unscreened pilot core and one unscreened earth core for monitoring and fault return.
Heavy sheath, no armour5.0 to 7.0 mm chloroprene sheath keeps the cable flexible enough to reel and drag.

Drill rig working at the face of a mesh-supported underground mine drift, the kind of drilling duty an MGM 115 Type 14 trailing cable supplies — Drill rig at the face of an underground drift. Mobile drilling machines of this kind are fed through a flexible trailing cable such as MGM 115 Type 14. Photo: Dylan McFarlane / University of Exeter, CC BY 2.0, via Wikimedia Commons.

Specifications

Technical data

Values from the current TEBAOFLEX MGM 115 Type 14 datasheet. The final construction is confirmed on the approved datasheet for your order.

Electrical, mechanical and material data

Parameter	Value
Rated voltage	660/1100 V
Test voltage	2.5 kV
Conductor	Stranded, tinned copper wire, IEC 60228 Class 5
Insulation	EPR
Phase-core screen	Tinned copper / nylon braid
Pilot and earth cores	Unscreened
Lay-up	All cores laid up in contact
Separator	Colored textile tape for core identification
Bedding	Rubber-based bedding compound
Outer sheath	Heavy-duty chloroprene compound
Core arrangement	3 screened phase cores + 1 unscreened pilot core + 1 unscreened earth core
Armour	None (non-armoured cable)
Application	Drilling machines; deep mines where explosive gases and dust can accumulate, and surface use

Technical data: MGM 115 Type 14

Parameter	Unit	3×25+2×16	3×35+2×16	3×50+2×25	3×70+2×35	3×95+2×50
Phase cores / cross-section	mm²	3×25	3×35	3×50	3×70	3×95
Phase stranding	mm	196/0.40	276/0.40	396/0.40	360/0.50	475/0.50
Phase conductor diameter	mm	6.75	8.00	9.75	11.60	12.75
Phase insulation thickness	mm	1.6	1.6	1.7	1.8	2.0
Earth cores / cross-section	mm²	1×16	1×16	1×25	1×35	1×50
Earth stranding	mm	126/0.40	126/0.40	196/0.40	276/0.40	396/0.40
Earth conductor diameter	mm	5.50	5.50	6.75	8.00	9.75
Earth insulation thickness	mm	1.6	1.6	1.7	1.8	2.0
Pilot cores / cross-section	mm²	1×25	1×35	1×50	1×70	1×95
Pilot stranding	mm	196/0.40	276/0.40	396/0.40	360/0.50	475/0.50
Pilot conductor diameter	mm	6.75	8.00	9.75	11.60	12.75
Pilot insulation thickness	mm	1.5	1.5	1.6	1.6	1.7
Min. overall diameter	mm	43.2	47.3	53.7	61.2	69.3
Max. overall diameter	mm	46.5	50.7	57.6	65.0	73.9
Min. bending radius	mm	419	457	519	585	666
Outer sheath radial thickness	mm	5.0	5.2	5.7	6.3	7.0
Max. pulling tension	kgf	638	729	910	1148	1446
Approx. cable weight	kg/km	3550	4280	5650	7520	9800
Copper weight	kg/km	1307	1675	2340	3228	4326
Continuous current rating at 25 °C	A	110	135	170	205	250
Short-circuit current for 1 s	A	3450	3450	4550	4820	7300
Phase and earth conductors	Ω/km	0.795	0.565	0.393	0.277	0.210
Pilot conductor	Ω/km	1.240	1.240	0.795	0.565	0.393
3 screens parallel	Ω/km	1.10	1.20	1.40	0.70	0.85

Selection note: before ordering, ask our engineers to confirm the conductor operating temperature, ambient temperature range, core colours, sheath colour and the auxiliary-core sizes for your order (see the cable type designation), together with drum length and marking.

Standards & References

Applicable standards and compliance

Design specificationMGM 115, the flexible trailing cable specification in the Turkish Hard Coal Enterprises MGM mining cable series (MGM 101, 109, 110, 111, 112, 115 and 118); Type 14 is one of its core arrangements.
Conductor referenceStranded tinned copper conductors to IEC 60228 Class 5.
Voltage scope660/1100 V rated voltage and 2.5 kV test voltage.
ApprovalsMine-authority approvals, type-test reports and marking requirements are confirmed and quoted per order.

Construction

Material and build-up

MGM 115 Type 14 is a round five-core trailing cable. Three braid-screened phase cores, one unscreened pilot core and one unscreened earth core are laid up in contact, covered with a rubber bedding compound and a heavy-duty chloroprene sheath. There is no armour, so the cable stays flexible for reeling and dragging.

Conductor: stranded tinned copper wire to IEC 60228 Class 5, from 196/0.40 mm on 25 mm² to 475/0.50 mm on 95 mm² phase cores; tinning protects the fine strands in humid mine air.
Insulation: EPR on every core: 1.6 to 2.0 mm on phase and earth cores, 1.5 to 1.7 mm on the pilot core.
Phase-core screen: tinned copper and nylon braid over each phase core, giving an earthed layer that turns a crush or cut into an earth fault.
Pilot and earth cores: one pilot core and one earth core, both insulated and unscreened, for the monitoring circuit and the fault-current return.
Separator: coloured textile tape over the cores for core identification.
Lay-up: all five cores laid up in contact to give a compact, round cable.
Bedding: rubber-based bedding compound that fills the interstices and supports the sheath.
Outer sheath: heavy-duty chloroprene compound, 5.0 to 7.0 mm radial thickness, for abrasion and tear resistance in trailing service.

FAQ

Selection questions

What is MGM 115 Type 14 and how does it differ from the other MGM 115 types?

Type 14 is the MGM 115 trailing cable with three screened phase cores plus an unscreened pilot core and an unscreened earth core, each insulated, laid up in contact, and without armour. Type 16 has two earth cores and a smaller pilot lying between the phase cores, Type 7 uses a bare copper earth in contact with the phase screens, Type 7M also screens the pilot, Type 7S has a unit of three thin pilot cores, and Type 11 has three screened phase cores with a single 16 mm² pilot conductor.

Where is Type 14 used and how do I pick the size?

The datasheet lists Type 14 for drilling machines in deep mines with explosive gas and dust and for surface use. Pick the phase size from the load current (110 A for 3×25 up to 250 A for 3×95 at 25 °C continuous), then check the voltage drop over the trailing length, the 1 s short-circuit current of the supply, and the maximum pulling tension against your reel or haulage method.

Which details are needed for a quotation?

Send the cable type (for example 3×50+2×25), the length per drum and number of drums, the machine and its supply voltage, the pilot or earth-continuity system used at the gate-end switch, any sheath marking, and the mine authority whose approval or test report you need. We confirm the auxiliary-core sizes and return the approved datasheet with the quotation.

How does Type 14 compare with Type 16 at the same phase size?

Both have three screened 660/1100 V phase cores with the same current ratings. Type 14 is the heavier design: at 3×25 it measures 43.2 to 46.5 mm and weighs about 3550 kg/km, while Type 16 measures 36.5 to 40.2 mm and weighs about 2770 kg/km, because Type 16 uses thinner 1.0 mm insulated auxiliary cores placed between the phase cores. None of Types 7, 14 and 16 is armoured; armoured MGM power cables are listed in the MGM mining cable category.

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Request this cable.

Send the model and cable type (e.g. 3×50+2×25), drum lengths and total length, supply voltage, pilot system, marking and mine approval requirement.

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MGM 115 Type 14 660/1100V Screened Mining Cable for Drilling Machines

Application & Features