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Product

Underground Mining Armoured Communication CablesMGM 110 / BS 6708Single Wire Armour (SWA)Intrinsically Safe (IS) Comms

MGM 110 Single Layer Armoured Mining Communication CableMGM 110 / Spec 542 / BS 6708 · 250 V · 1 to 100 Pairs (0.5–0.8 mm²) · PE cores · Al/Cu

MGM 110 Single Layer Armoured Mining Communication Cable is a heavy-duty underground roadway telephone, cadence signalling, pre-start alarm, and leaky-feeder/RS-485 telemetry cable engineered with low-loss polyethylene (PE) twisted pairs, a collective

EMC screen

Low-EMC design

Flame-retardant

Water-resistant

Variant

Order designation: MGM 110 SWA 2 × 2 × 0.5 mm²
Outer Ø ≈: 12.80 mm
Metal weight: 24.0 kg/km
Total weight ≈: 295.0 kg/km
Min. bend R (fixed): 128 mm

All sizes (5)

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

Impedance Z₀: 110 Ω ± 15 Ω
Pair counts: 1, 2, 4, 7 to
Mutual cap.: ≤ 55–65 nF/km
Armouring: Single layer SWA
Loop resistance: ≤ 73.6 Ω/km
Temp. rating: -20 to +70 °C

Typical values for this cable type, based on NCB / British Coal Spec 542 (MGM 110) / BS 6708 — confirmed in the datasheet and quotation for your order.

Application fit

Is MGM 110 Single Layer Armoured right for your machine?

Designed for underground coal and hard-rock mine roadways, conveyor haulage drifts, refuge chamber emergency telephones, conveyor pull-key lockout systems, and intrinsically safe (Ex ia/ib) PLC

Fixed installation

Suitable

Galvanized steel wire armour (SWA) protects against roof-fall rock impact and roadway hanger crush.

Switchgear & control cabinet wiring

Suitable

Terminates via standard mining flameproof (Ex d) or increased-safety (Ex e) armoured cable glands.

Trailing & towing

Not suitable

SWA roadway cable is designed for fixed gallery suspension; for vertical shafts specify MGM 110 Double Armoured.

MGM 110 Double Layer Armoured

Energy chain / drag chain

Not suitable

Steel wire armoured mining cable cannot be used in dynamic drag chains.

S 369 C TP

Typical machinesUnderground Coal & Hard-Rock MinesConveyor Pull-Key & Pre-Start SignallingRefuge Chamber & Shaft Emergency PhonesIntrinsically Safe (Ex ia) Mine SCADACross-Rail & Road Tunnel Emergency Comms

Construction

Layer by layer

0.8 mm solid (or 7×0.30 mm stranded) annealed tinned/bare copper conductors, solid polyethylene (PE) insulation twisted into pairs

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Annealed tinned or bare copper	Ø 0.80 mm solid (0.50 mm²) or 7 × 0.30 mm stranded (0.50 mm²) annealed copper per IECBS 6708 / Spec 542
2	Solid polyethylene (PE) twisted pairs	Medium/high-density polyethylene core insulation twisted into colour-coded pairs (≤ 65BS 6708 / Spec 542
3	Collective Al-PET tape screen + drain	100 % coverage aluminium/polyester laminate tape with 0.50 mm² tinned copper drain wireBS 6708 / Spec 542
4	Extruded PVC / LSZH inner bedding	Continuous extruded thermoplastic bedding isolating the screen from the steel wire armourBS 6708
5	Single layer galvanized steel wire	Helically applied heavy-zinc-coated round steel wires (≥ 90 % coverage) per BS EN 10257-1BS EN 10257-1
6	Flame-retardant mining PVC or LSZH	Heavy-duty flame-retardant black PVC (or royal blue for Ex ia circuits / low-smoke LSZH)IEC 60332-1/-3

MGM 110 SWA (1/0.8 mm Solid Cu, PVC)

Standard roadway telephone and signalling cable with 0.8 mm solid conductors for Krone/IDC punch-down blocks.

MGM 110 SWA (7/0.30 mm Stranded Cu, PVC)

Vibration-resistant 0.50 mm² stranded conductor construction for conveyor haulage and screw terminals.

MGM 110 SWA-LSZH (Halogen-Free Tunnel Grade)

Low-smoke zero-halogen bedding and outer sheath per IEC 60332-3-22 and IEC 60754-1/2 for enclosed mine drifts.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on NCB / British Coal Spec 542 (MGM 110) / BS 6708. Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance: Approx. 110 Ω ± 15 Ω (voice / data band)
Conductor loop DC resistance: ≤ 73.6 Ω/km at 20 °C (0.50 mm² pair)
Max. mutual pair capacitance: ≤ 65 nF/km (typically 52–58 nF/km)
Capacitance unbalance (pair-to-pair): ≤ 250 pF / 500 m at 800 Hz
Operating voltage rating: 250 V rms (intrinsically safe & telecom)
Dielectric test voltage: 1,500 V AC (core/core) / 2,000 V AC

Thermal

Operating temperature range: -20 °C to +70 °C
Installation temperature range: -5 °C to +50 °C
Flame propagation (single cable): IEC 60332-1-2
Bunched cable fire test: IEC 60332-3-22 / BS 4066 Pt 3
LSZH halogen & smoke option: IEC 60754-1/2 & IEC 61034-2
Max. short-circuit core temperature: +130 °C (PE core insulation)

Mechanical

Conductor construction: 1 × 0.80 mm (0.50 mm²) or 7 × 0.30 mm (0.50
Standard pair counts: 1, 2, 4, 7, 10, 15, 20, 30, 50, 100 pairs
Armour wire diameter: 0.90 mm, 1.25 mm, or 1.60 mm galvanized steel
Min. bend radius (fixed install): 10 × overall cable diameter (10×D)
Armour earth conductance: ≥ 50 % of largest copper conductor (with Cu
Gland compatibility: BS 6121 / EN 62444 Ex d / Ex e SWA glands

Resistance

Rockfall & impact crush resistance: Single layer galvanized steel wire armour
Mine water & dampness: Zero-moisture-absorption PE core insulation
Methane & coal-dust environment: Anti-static / flame-retardant outer sheath
Rodent protection: Full circumference steel wire armour barrier
Acid mine water corrosion: Heavy zinc coating + extruded outer sheath
RoHS / REACH status: RoHS 3 compliant

Reference standards

Mining telecom specification: NCB / British Coal Spec 542 / MGM 110
British mining cable standard: BS 6708 / BS 5308 (multipair design)
Armour wire standard: BS EN 10257-1 galvanized steel wire
Intrinsically safe installation: IEC 60079-11 / IEC 60079-14 (Ex ia / ib)
Flame test standards: IEC 60332-1-2 & IEC 60332-3-22
Quality certification: EN 10204 3.1 + armour resistance report

Identification

Pair colour code: BS 6708 / BT CW1308 / IEC 60189 multipair
Outer sheath colour: Black (standard) or Blue (Ex ia
Surface legend: TEBAOFLEX MGM 110 SWA [N×2×0.5] MINING COMM
Standard drum lengths: 250 m, 500 m, 1000 m
Armour designation: SWA (Single Wire Armoured)
Batch traceability: Lot number & sequential metre mark

Sizes

5 standard configurations (MGM 110 Single Layer Armoured)

Dimensional, physical and high-frequency electrical parameters for MGM 110 Single Layer Armoured per NCB / British Coal Spec 542 (MGM 110) / BS 6708.

Dimensions & construction
Order designation	Construction / Variant	Conductor	Outer Ø ≈ mm	Metal kg/km	Weight ≈ kg/km	Min. bend R fixed mm
Standard MGM 110 Single Layer Armoured variants
MGM 110 SWA 2 × 2 × 0.5 mm²	2 Pairs + Screen + 0.9 mm SWA	0.50 mm² (1/0.8 or 7/0.3)	12.80	24.0	295.0	128
MGM 110 SWA 4 × 2 × 0.5 mm²	4 Pairs + Screen + 0.9 mm SWA	0.50 mm² (1/0.8 or 7/0.3)	14.50	43.0	370.0	145
MGM 110 SWA 10 × 2 × 0.5 mm²	10 Pairs + Screen + 1.25 mm SWA	0.50 mm² (1/0.8 or 7/0.3)	19.60	102.0	680.0	196
MGM 110 SWA 20 × 2 × 0.5 mm²	20 Pairs + Screen + 1.25 mm SWA	0.50 mm² (1/0.8 or 7/0.3)	24.20	198.0	990.0	242
MGM 110 SWA 50 × 2 × 0.5 mm²	50 Pairs + Screen + 1.60 mm SWA	0.50 mm² (1/0.8 or 7/0.3)	34.80	490.0	2,150.0	348

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Dimensions and weights are nominal production values subject to manufacturing tolerances per NCB / British Coal Spec 542 (MGM 110) / BS 6708.

Impedance, capacitance & electrical data
Configuration	Max. conductor DC R Ω / km @ 20 °C	Characteristic Z₀ Ω	Capacitance pF / m	Velocity VoP %	Test voltage V rms
2 Pairs + Screen + 0.9 mm SWA	183.3	110	48.0	66	1,500
4 Pairs + Screen + 0.9 mm SWA	183.3	110	48.0	66	1,500
10 Pairs + Screen + 1.25 mm SWA	183.3	110	48.0	66	1,500
20 Pairs + Screen + 1.25 mm SWA	183.3	110	48.0	66	1,500
50 Pairs + Screen + 1.60 mm SWA	183.3	110	48.0	66	1,500

Transmission parameters measured at 1–100 MHz (+20 °C) in accordance with NCB / British Coal Spec 542 (MGM 110) / BS 6708.

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
Conductor loop resistance & armour resistance	≤ 73.6 Ω/km pair loop; armour conductance verified	Every drum
1.5 kV / 2.0 kV AC dielectric withstand test	No breakdown between cores, screen, and SWA armour	Every drum
Sample tests
Mutual capacitance & pair-to-pair unbalance	≤ 65 nF/km mutual cap; ≤ 250 pF/500m unbalance	Per batch
IEC 60332-3-22 bunched flame & impact crush	Passes vertical tray fire test and BS 6708 impact test	Qualification

Inspection certificate

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

Product approvals

MGM 110 / Spec 542 / BS 6708IEC 60079-11 / -14 (Ex ia)IEC 60332-3-22

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX MGM 110 SWA [N×2×0.5] MINING

Delivery form: Spools, reels or export wooden drums
Standard reel lengths: 100 m · 305 m (1000 ft) · 500 m · 1000 m
MOQ: 100 m (stock) · 305–500 m (production)
Lead time: 1–3 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFMGM 110 Single Layer Armoured Mining Communication Cable – technical datasheet5 sizes · construction, technical data, approvals XLSXMGM 110 Single Layer Armoured spec data (Excel)All 5 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.

When should I specify MGM 110 Single Armoured (SWA) vs MGM 110 Double Armoured (DWA)?

Specify MGM 110 Single Wire Armoured (SWA) for horizontal and gently inclined underground mine roadways, conveyor galleries, and tunnel walls; specify MGM 110 Double Wire Armoured (DWA) for vertical mine shafts, steeply inclined drifts (> 45°), and longwall shearer haulage zones where counter-helical dual armour prevents torsional spin under suspended self-weight.

Does MGM 110 meet Intrinsically Safe (Ex ia / Ex ib) capacitance and inductance limits?

Yes, its polyethylene pair insulation maintains low mutual capacitance (≤ 55–65 nF/km) and low inductance-to-resistance ratio (L/R ≤ 25 µH/Ω), complying with IEC 60079-11/14 parameters for underground methane atmospheres. Each production reel undergoes sweep-frequency impedance and return-loss verification, dielectric spark testing, and dimensional inspection before dispatch with an EN 10204 3.1 test certificate.

Should I choose 1/0.8 mm solid or 7/0.30 mm stranded conductors?

Choose 1/0.8 mm solid copper when terminating onto Krone IDC telephone distribution frames; choose 7/0.30 mm stranded copper for conveyor pull-keys, pre-start alarms, and vibrating machinery junction boxes. Each production reel undergoes sweep-frequency impedance and return-loss verification, dielectric spark testing, and dimensional inspection before dispatch with an EN 10204 3.1 test certificate.

Can copper wires be included in the SWA layer to boost earth-fault conductivity?

Yes, in accordance with British Coal / BS 6708 practice, tinned copper wires can be interspersed within the galvanized steel wire armour layer so armour conductance exceeds 50 % of the largest phase/signal conductor. Each production reel undergoes sweep-frequency impedance and return-loss verification, dielectric spark testing, and dimensional inspection before dispatch with an EN 10204 3.1 test certificate.

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MGM 110 Single Layer Armoured Mining Communication Cable

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