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Product

ZN-TF-37 copper-steel bimetallic mining telephone & pull-cord cable ZN-TF-37 / EMAGCu+Steel Bimetallic (MFL)LOI ≥ 29% Cat. C FR-PVC

YnTKGMFLY Copper-Steel Bimetallic Mining Telephone CableYnTKGMFLY EMAG-approved underground mining telephone, intercom and pull-cord signalling cable per ZN-TF-37, featuring high-tensile copper-steel bimetallic conductors (MFL, 0.5 mm²), colour-coded PVC pairs and high-LOI Cat. C grey FR-PVC sheath.

Engineered for underground mining, open-cast excavation, shaft infrastructure and heavy industrial service per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24 across -30 to +70 °C.

Anti-torsion braid

Flame-retardant

Approved

Oil-resistant

Configuration

Order designation: YnTKGMFLY 5×2×0.8 (0.5 mm² MFL)
Outer Ø ≈: 11.2 mm
Net weight ≈: 152 kg/km
Tensile rating ≈: 3.2 kN
Core / stranding: Composite Cu + Steel strands

All sizes (3)

Request a quote Datasheet WhatsApp info@tebaoflex.com

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

Rated voltage: 300 V
Operating temp.: -30 to +70 °C
Min. bend radius: 10 × OD
Core / conductor: 1–10×2×0.5 MFL
Outer protection: Grey Yn FR-PVC
Standard: ZN-TF-37 / EMAG

Typical values for this cable type, based on ZN-TF-37 / WT-TK-21 / IEC 60332-3-24 — confirmed in the datasheet and quotation for your order.

Application fit

Is YnTKGMFLY right for your machine?

Engineered for underground mining, open-cast excavation, shaft infrastructure and heavy industrial service per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24 across -30 to +70 °C.

Mine roadway & tunnel wall hangers

Suitable

Engineered for underground mining shafts, galleries and tunnel infrastructure per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24.

Fixed installation

Suitable

Suitable for vertical shaft cleats, gallery messenger hooks and tray routing within 10 × OD.

Free-hanging vertical run

Suitable

Supports inclined roadway and vertical mine shaft suspension within rated kN load across -30 to +70 °C.

Festoon & line chain

Not suitable

Not optimized for high-speed overhead crane C-track festoon loops; select a dedicated festoon cable.

NGFLGÖU Flat Rubber Festoon Cable

Typical machinesMining & TunnellingUnderground Coal & Hard-Rock MiningOpen-Cast Excavators, Draglines & ShovelsVertical Mine Shafts, Hoists & BoreholesTunneling, Mineral Processing & Slurry Plants

Construction

Layer by layer

Shown: YnTKGMFLY (ZN-TF-37 / WT-TK-21 / IEC 60332-3-24) featuring copper-steel bimetallic conductors (mfl), 5-pair pvc color coding (y) and mining flame-retardant sheath (yn) (4-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Copper-Steel Bimetallic Conductors (MFL)	Composite multi-wire copper + high-tensile steel strands (0.5 mm² / Ø 0.8 mm)
2	5-Pair PVC Color Coding (Y)	Pairs 1–5: Natural a-wire paired with Blue, Yellow, Green, Black & Red b-wire
3	Polyester Separator Tape	Helically lapped polyester film tape stabilizing the 5-pair core
4	Mining Flame-Retardant Sheath (Yn)	Grey high-LOI (LOI ≥ 29%) Cat. C flame-retardant PVC outer jacket

YnTKGMFLY — Standard Mining Execution

Built to ZN-TF-37 / WT-TK-21 / IEC 60332-3-24 with copper-steel bimetallic conductors (mfl) and mining flame-retardant sheath (yn)

YnTKGMFLY — Custom Drum Length & Gland Kit

Available in custom shaft/roadway drum lengths or pre-terminated assemblies

YnTKGMFLY — Routine & Flame Test Certified

Supplied with EN 10204 3.1 routine dielectric, resistance & flame test report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on ZN-TF-37 / WT-TK-21 / IEC 60332-3-24. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: 300 V (ZN-TF-37 / WT-TK-21 / IEC 60332-3-24)
Core / conductor construction: Copper-Steel Bimetallic Conductors (MFL) — Composite multi-wire copper + high-tensile steel strands (0.5 mm² / Ø 0.8 mm)
Primary dielectric / buffering: 5-Pair PVC Color Coding (Y) — Pairs 1–5: Natural a-wire paired with Blue, Yellow, Green, Black & Red b-wire

Thermal

Continuous operating temperature: -30 to +70 °C (mining & industrial service)
Short-circuit / peak thermal rating: Verified thermal stability per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24
Storage & transport temperature: −40…+80 °C on export wooden/steel drum

Mechanical

Outer protection / armouring: Mining Flame-Retardant Sheath (Yn) — Grey high-LOI (LOI ≥ 29%) Cat. C flame-retardant PVC outer jacket
Minimum bending radius: 10 × OD
Crush, impact & abrasion duty: Heavy-duty mining rock-cut, impact and tensile protection per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24

Resistance

Flame retardancy & mine fire safety: Self-extinguishing / flame-retardant mining jacket per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24
Mine water, oil & chemical resistance: Resistant to acidic mine water, hydraulic oils and abrasion per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: ZN-TF-37 / WT-TK-21 / IEC 60332-3-24
Flame & environmental test standards: IEC 60332 / MSHA / EN 60794 / IEC 60228
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: YnTKGMFLY
Sheath colour & metre marking: Continuous metre-marked grey mining outer sheath
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard YnTKGMFLY mining & industrial configurations

Manufactured to ZN-TF-37 / WT-TK-21 / IEC 60332-3-24 for underground mining, open-cast excavation, shaft and heavy industrial systems.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Tensile rating kN ≈	Min. bend R mm
YnTKGMFLY Construction Schedule (-30 to +70 °C)
YnTKGMFLY 2×2×0.8 (0.5 mm² MFL)	2 × 2 × 0.5 mm² Cu/Fe Bimetallic	Composite Cu + Steel strands	7.8	78	1.4	65
YnTKGMFLY 5×2×0.8 (0.5 mm² MFL)	5 × 2 × 0.5 mm² Cu/Fe Bimetallic	Composite Cu + Steel strands	11.2	152	3.2	90
YnTKGMFLY 10×2×0.8 (0.5 mm² MFL)	10 × 2 × 0.5 mm² Cu/Fe Bimetallic	Composite Cu + Steel strands	14.8	268	5.8	120

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom core cross-sections, pair/fibre counts, armour grades and factory drum lengths available per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
2 × 2 × 0.5 mm² Cu/Fe Bimetallic	48.00	≤96 Ω/km loop · 1.4 kN tensile	-30 to +70 °C
5 × 2 × 0.5 mm² Cu/Fe Bimetallic	48.00	≤96 Ω/km loop · 3.2 kN tensile	-30 to +70 °C
10 × 2 × 0.5 mm² Cu/Fe Bimetallic	48.00	≤96 Ω/km loop · 5.8 kN tensile	-30 to +70 °C

Every production length undergoes routine conductor DC resistance, high-voltage Spark/AC dielectric or OTDR continuity and dimensional verification.

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 resistance, continuity & dimensional verification (ZN-TF-37 / WT-TK-21 / IEC 60332-3-24)	DC resistance at 20 °C / optical attenuation and outer diameter within ZN-TF-37 / WT-TK-21 / IEC 60332-3-24 tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (ZN-TF-37 / WT-TK-21 / IEC 60332-3-24)	Zero dielectric breakdown and verified insulation resistance over full production length	Every manufactured drum length
Sample tests
Flame propagation, mechanical crush & thermal ageing qualification (ZN-TF-37 / WT-TK-21 / IEC 60332-3-24)	Verified flame retardancy, mechanical integrity and thermal endurance across -30 to +70 °C	Type qualification & periodic lot audit

Inspection certificate

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

Product approvals

ZN-TF-37 / EMAG CompliantEN 10204 3.1 Factory Test CertificateCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX YnTKGMFLY ZN-TF-37 / EMAG 300 V CE

Delivery form: Heavy-duty export fumigated wooden drums or steel mine reels
Standard lengths: 500 m, 1,000 m or custom continuous shaft/reeling lengths
MOQ: 100 m (standard configurations) · 500 m (custom builds)
Lead time: 2–5 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFYnTKGMFLY Copper-Steel Bimetallic Mining Telephone Cable – technical datasheet3 sizes · construction, technical data, approvals XLSXYnTKGMFLY spec data (Excel)All 3 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-24
Updated: 2026-10-24

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What governing standard and construction define YnTKGMFLY (YnTKGMFLY Copper-Steel Bimetallic Mining Telephone Cable)?

YnTKGMFLY (YnTKGMFLY Copper-Steel Bimetallic Mining Telephone Cable) is manufactured in accordance with ZN-TF-37 / WT-TK-21 / IEC 60332-3-24 for 300 V duty over -30 to +70 °C. Its 4-layer construction comprises Copper-Steel Bimetallic Conductors (MFL), 5-Pair PVC Color Coding (Y) and Mining Flame-Retardant Sheath (Yn).

What is the minimum bending radius and operating temperature range for YnTKGMFLY?

The minimum bending radius for YnTKGMFLY is 10 × OD across its continuous operating temperature range of -30 to +70 °C, ensuring mechanical and dielectric reliability in mining and heavy industrial service.

How are the concentric layers of YnTKGMFLY arranged from inside to outside?

From inside to outside, the construction sequence is: (01) Copper-Steel Bimetallic Conductors (MFL) (Composite multi-wire copper + high-tensile steel strands (0.5 mm² / Ø 0.8 mm)); (02) 5-Pair PVC Color Coding (Y) (Pairs 1–5: Natural a-wire paired with Blue, Yellow, Green, Black & Red b-wire); (03) Polyester Separator Tape (Helically lapped polyester film tape stabilizing the 5-pair core); (04) Mining Flame-Retardant Sheath (Yn) (Grey high-LOI (LOI ≥ 29%) Cat. C flame-retardant PVC outer jacket).

What factory test certificates are supplied with YnTKGMFLY?

Every production drum of YnTKGMFLY undergoes routine conductor resistance/continuity, high-voltage dielectric and dimensional testing per ZN-TF-37 / WT-TK-21 / IEC 60332-3-24, and is delivered with an EN 10204 3.1 factory test certificate.

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Get an engineering quote for YnTKGMFLY

Your selection and application details are copied into the enquiry form below.

01Selected sizes

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02Reel & motion

Add your operating conditions here to include them in your enquiry.

Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

YnTKGMFLY Copper-Steel Bimetallic Mining Telephone Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:

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