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MGM 101 / BS 6708 mining elastomer cableMGM 101 / BS 6708EPR / Heavy PCP (EM2)Mining Battery & IS Gear

MGM 101 CableMGM 101 / BS 6708 heavy-duty EPR/PCP elastomer cable for mining batteries & equipment

British mining specification MGM 101 / BS 6708 heavy-duty flexible elastomer cable engineered with fine-stranded tinned copper conductors, GP4/EPR rubber insulation, central cord reinforcement, and tear/acid/oil-resistant EM2 polychloroprene outer sheath.

Oil-resistant
Flame-retardant
Anti-torsion braid
Water-resistant
Order designation
MGM101-2X2.5-CL6
Configuration
2 × 2.5 mm² Class 6 (Battery/Lamp)
Rated voltage
300/500 V
Nominal OD
9.8 mm
Weight
138 kg/km
All sizes (12)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Specification
NCB MGM 101
UK underground mining standard
Voltage rating
300/500–600/1kV
Battery, cap-lamp & auxiliary gear
Core configs
1C, 2C, 3C & 4C
1.5 mm² to 95 mm² Class 5/6 Cu
Insulation
EPR Type GP4
+90 °C cross-linked elastomer
Outer sheath
Heavy PCP (EM2)
Battery acid, oil & flame resistant
Flex life
High Torsion
Short-pitch lay around textile core

Typical values for this cable type, based on NCB / British Coal Specification MGM 101 / BS 6708 / BS EN 50525-2-21 — confirmed in the datasheet and quotation for your order.

Application fit

Is MGM 101 right for your machine?

Built for underground coal/potash mine cap-lamp cords, locomotive traction battery jumpers, intrinsically safe (IS) interconnects, and equipotential bonding.

Mine roadway & tunnel wall hangers

Suitable

Heavy-duty polychloroprene (EM2) sheath resists coal dust, acidic mine water, potassium/lead-acid battery electrolyte and rock abrasion.

Self-supporting pendant & push-button drop

Suitable

Short-lay Class 5/6 tinned copper cores cabled around a central textile strain cord endure continuous miner flexing.

Motor stator, traction & converter leads

Suitable

Single-core 16–95 mm² variants serve as flexible flameproof battery-locomotive cell jumpers and earth-bonding leads.

Energy chain / drag chain

Not suitable

Designed for underground mining equipment and battery harnesses, not high-speed factory cable carriers.

Use NSGAFCMÖU 1.8/3 kV
Typical machinesUnderground Coal, Potash & Gypsum MiningFlameproof Battery Locomotives & FSVsMiner Cap-Lamp & Personal Gas Monitor CordsIntrinsically Safe (Ex ia / ib) Signalling & CommsMining Switchgear Earth-Bonding & Auxiliary Leads

Construction

Layer by layer

Representative MGM 101 / BS 6708 construction: Class 5 or Class 6 tinned copper conductors + Type GP4 EPR elastomer insulation + central high-tenacity textile strain cord (on 2/3/4-core cords) + heavy-duty Type EM2 polychloroprene (PCP) outer sheath.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Fine / extra-fine tinned copper conductorsAnnealed tinned copper to BS EN 60228 Class 5 or extra-flexible Class 6 (1.5 mm² to 95 mm²)Resists corrosion in humid sulphur/chloride mine atmospheres and survives repeated flexing at cable glands
2Type GP4 EPR elastomer insulationCross-linked ethylene propylene rubber (Type GP4 to BS 7655 / EI4 to BS EN 50363) rated to +90 °CProvides high insulation resistance and thermal overload margin
3Central high-tenacity textile strain centerSpun polyaramid or high-tenacity polyester/cotton cord in the center interstice of 2-core, 3-core and 4-core buildsAbsorbs axial tug forces and prevents copper core elongation
4Torsion-relieving fabric separator wrapOpen-weave fabric binder or separator tape over the short-pitch cabled coresPrevents corkscrewing under torsional twisting
5Heavy-duty Type EM2 polychloroprene (PCP) outer sheathVulcanised black (or high-visibility yellow) heavy-duty polychloroprene rubber sheath (Type EM2 to BS 7655)Self-extinguishing in fire (BS EN 60332-1-2) and resistant to sulphuric acid, caustic electrolyte and mineral oil

MGM101-FLEX (2C / 3C / 4C Cap-Lamp & IS Auxiliary Cord)

2×1.5 mm² to 4×4.0 mm² extra-flexible Class 6 tinned copper with central strain cord for miner cap-lamps, methanometers and IS sensors

MGM101-BAT (1C Battery & Bonding Cable, 10–95 mm²)

Single-core 0.6/1 kV heavy EPR/PCP cable for underground locomotive traction battery inter-cell jumpers and flameproof bonding

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on NCB / British Coal Specification MGM 101 / BS 6708 / BS EN 50525-2-21. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage (U0/U)
300/500 V (2–4C light duty) · 0.6/1 kV (1C battery/power)
AC routine test voltage
2.0 kV AC (300/500 V) · 3.5 kV AC (0.6/1 kV) for 5 min
Max. conductor temperature
+90 °C continuous · +250 °C short-circuit

Thermal

Operating temperature range
−35 °C to +85 °C
Installation & storage temperature
−40 °C to +70 °C

Mechanical

Conductor stranding
BS EN 60228 Class 5 (power) & Class 6 (cap-lamp/portable)
Min. bend radius
4 × OD (fixed) · 6 × OD (free flexing)
Tear resistance (EM2 sheath)
≥ 10 N/mm per BS 6469 / BS EN 60811

Resistance

Battery acid & alkali resistance
Resistant to 30 % H2SO4 & KOH electrolyte spills
Oil & hydraulic fluid
BS EN 60811-404 IRM 902 oil immersion pass
Flame retardancy
BS EN 60332-1-2 underground mining flame pass

Reference standards

Mining specifications
NCB / British Coal MGM 101 · BS 6708 · BS EN 50525-2-21
Compound specifications
BS 7655-1.2 (GP4 EPR) · BS 7655-2.1 (EM2 PCP)

Identification

Outer sheath colour
Black or Mining Yellow (Green/Yellow for earth bonding)
Surface legend
TEBAOFLEX MGM 101 / BS 6708 MINING CABLE EPR/PCP [SIZE]
Customs tariff (HS)
8544.49

Sizes

12 standard MGM 101 / BS 6708 mining equipment, cap-lamp & battery cable configurations

Includes 2–4 core portable/IS cords (300/500 V) and single-core underground battery/bonding cables (0.6/1 kV).

Core configurations, OD, weight & ampacity
Order designationCores × Cross-SectionVoltage
U0/U		Max R @20°C
Ω/km		Nominal OD
mm		Weight
kg/km		Ampacity
A (30°C)		Enquiry
MGM 101 Multi-Core Cap-Lamp, Methanometer & IS Equipment Cords (300/500 V)
MGM101-2X1.5-CL62 × 1.5 mm² Class 6 (Cap-Lamp)300/500 V13.708.49818
MGM101-2X2.5-CL62 × 2.5 mm² Class 6 (Battery/Lamp)300/500 V8.219.813826
MGM101-3G1.5-CL53G 1.5 mm² Class 5300/500 V13.709.212218
MGM101-3G2.5-CL53G 2.5 mm² Class 5300/500 V8.2110.817226
MGM101-4G1.5-CL54G 1.5 mm² Class 5300/500 V13.7010.215216
MGM101-4G2.5-CL54G 2.5 mm² Class 5300/500 V8.2111.821023
MGM 101 Single-Core Underground Traction Battery & Bonding Leads (0.6/1 kV)
MGM101-1X10-BAT1 × 10 mm² Class 5 (Bonding)0.6/1 kV1.958.814890
MGM101-1X16-BAT1 × 16 mm² Class 5 (Battery/Bond)0.6/1 kV1.2410.0210120
MGM101-1X25-BAT1 × 25 mm² Class 5 (Battery Cell)0.6/1 kV0.8011.6305160
MGM101-1X35-BAT1 × 35 mm² Class 5 (Battery Cell)0.6/1 kV0.5712.8405198
MGM101-1X50-BAT1 × 50 mm² Class 5 (Loco Battery)0.6/1 kV0.3914.6555250
MGM101-1X70-BAT1 × 70 mm² Class 5 (Loco Battery)0.6/1 kV0.2816.5745312
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Cap-lamp cords (2×1.5 and 2×2.5 mm²) use ultra-short twist lay pitches around a central textile cord to survive ≥ 100,000 belt-entry flex cycles.

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
2.0 kV / 3.5 kV AC 5-minute water-bath dielectric testZero insulation breakdown on finished lengths100 % of production reels
Sample tests
Belt-entry flex fatigue & tear resistance testVerify EM2 PCP sheath tear ≥ 10 N/mm and Class 6 strand enduranceProduction lot
Sulphuric acid, potassium hydroxide & oil immersion testRetention of tensile strength and elongation after 168 h acid/oil bathType approval

Inspection certificate

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

Product approvals

NCB Specification MGM 101 & BS 6708 Mining CompliantBS 7655 GP4 EPR & Heavy-Duty EM2 PCP Verified

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX MGM 101 / BS 6708 MINING CABLE EPR/PCP [SIZE]
Delivery form
100 m coils or 500 m wooden reels
Sheath colours
Black, Mining Yellow, or Green/Yellow (bonding)
Lead time
2–3 weeks ex-works

Technical documents

Downloads

PDFMGM 101 Cable – technical datasheet12 sizes · construction, technical data, approvalsXLSXMGM 101 spec data (Excel)All 12 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 is the origin and purpose of the MGM 101 cable specification?
MGM 101 was established by British Coal / National Coal Board (alongside BS 6708) for flexible elastomeric cords and single-core battery/bonding leads used in gassy underground mines, covering miner cap-lamp cords, flameproof battery-locomotive inter-cell connections, and intrinsically safe (IS) auxiliary apparatus.
Why must MGM 101 cables use Type EM2 polychloroprene (PCP) rather than PVC or standard rubber?
Underground battery containers and miners' cap-lamp packs use sulphuric acid (lead-acid) or potassium hydroxide (alkaline) electrolytes in an atmosphere containing methane, coal dust, and hydraulic oil. Type EM2 polychloroprene is inherently self-extinguishing when removed from a flame and resists both strong battery acids/alkalis and mineral oils without swelling or cracking.
How are the 2-core cap-lamp and portable instrument cords protected against conductor breakage at the gland entry?
The 2-core and 3-core portable MGM 101 cords use Class 6 extra-fine tinned copper strands laid at a very short helical pitch around a central textile strength member, allowing the cable to bend sharply at the battery lid or helmet clip without kinking.
Can single-core MGM 101 cables be used for flameproof enclosure earth bonding?
Yes. The 10 mm² to 70 mm² single-core MGM 101 cables (available in black or green/yellow EM2 sheath) are widely used as flexible equipotential bonding jumpers across underground roadway transformers, switchgear skids, and battery-locomotive battery boxes.

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MGM 101 Cable

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