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Product

PN-G-90100 Polish Mining Rubber CablesPN-G-90104300/500 VTwin-Core Mining Cord

OnG-Szn CablePN-G-90104 · 300/500 V (250 V mining) · Twin-core (2×) · Extra-flexible Cu · EPR · PCP

OnG-Szn ('sznur górniczy') is a compact, extra-flexible twin-core mining rubber cord manufactured to PN-G-90104 for underground miner cap-lamps, portable low-voltage hand tools, gas detectors, and local signalling appliances. Built with high-strand-count

Flame-retardant

Oil-resistant

Anti-torsion braid

Approved

Configuration

Order designation: OnG-Szn 2×4.0
Outer Ø ≈: 12.6 mm
Copper weight: 77 kg/km
Total weight ≈: 225 kg/km
Min. bend R (fixed): 50 mm

All sizes (10)

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

Rated voltage: 300/500 V
Core layout: 2 cores (twin)
Conductor max.: +70 °C
Min. bend R: 4 × D / 6 × D
Ambient (flex): -25 to +60 °C
Flame test: IEC 60332-1-2

Typical values for this cable type, based on PN-G-90104 / ZN-TF-209 — confirmed in the datasheet and quotation for your order.

Application fit

Is OnG-Szn right for your machine?

Purpose-built for personal miner cap-lamps, portable underground inspection lamps, handheld low-voltage instruments, and local acoustic signalling pull-cords.

Self-supporting pendant & push-button drop

Suitable

Ideal for handheld underground instruments, pendant switches, and portable inspection lights.

Trailing & towing

Suitable

Lightweight, kink-resistant cord for miner battery cap-lamps and portable gas monitors.

Mine roadway & tunnel wall hangers

Suitable

Used for roadway acoustic signalling pull-switches and low-voltage auxiliary connections.

Fixed installation

Suitable

Suitable for short interconnections between intrinsically safe barriers and sensors.

Motorised monospiral reel

With conditions

Suitable for small spring-return tool balancers only; not for heavy motor haulage.

OnG 0.6/1 kV

Typical machinesUnderground Miner Cap-LampsPortable Mine Hand ToolsIntrinsically Safe Gas InstrumentationRoadway Acoustic SignallingTunnelling & Shaft Inspection Gear

Construction

Layer by layer

Two (or three) high-flexibility copper cores with EPR insulation twisted at short pitch around textile reinforcement threads and jacketed

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Extra-flexible copper conductor	Fine or extra-fine stranded annealed plain or tinned copper wire (Class 5 / Class 6)IEC 60228 Class 5/6
2	EPR elastomer insulation	Cross-linked ethylene-propylene rubber compound with high dielectric elasticityPN-G-90104
3	Short-lay core twist & cotton/synthetic	Two insulated cores twisted with strain-relieving textile threads for pull resistancePN-G-90104
4	Flexible polychloroprene cord sheath	Flame-retardant, oil-, sweat-, and abrasion-resistant polychloroprene (PCP) compoundPN-G-90104

OnG-Szn 2× (1.0–2.5 mm²)

Ultra-flexible twin-core cord for miner cap-lamps, battery packs, and handheld underground instruments.

OnG-Szn 2× / 3× (2.5–6.0 mm²)

Heavy portable cord for low-voltage underground hand tools, vulcanising presses, and local lighting.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on PN-G-90104 / ZN-TF-209. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U: 300/500 V (250 V mining)
Routine AC test voltage: 2.0 kV rms / 5 min
Insulation resistance at 20 °C: ≥ 20 MΩ·km
Operating current type: AC 50/60 Hz & DC battery
Conductor stranding: IEC 60228 Class 5 / Class 6
Intrinsic safety compatibility: Low-inductance twisted pair layout

Thermal

Max. conductor operating temp.: +70 °C continuous
Max. short-circuit temperature: +200 °C (max. 5 s)
Mobile ambient range: -25 °C to +60 °C
Fixed ambient range: -40 °C to +60 °C
Min. flexing temperature: -25 °C
Thermal ageing stability: PN-G-90100 air-oven verified

Mechanical

Min. bend radius (fixed): 4 × overall diameter (D)
Min. bend radius (flexing): 6 × overall diameter (D)
Flexing endurance: ≥ 30,000 reverse bend cycles
Axial pull reinforcement: Central textile strain-relief yarns
Kink & twist resistance: Short-pitch core lay-up
Abrasion resistance: Smooth low-friction PCP jacket

Resistance

Flame retardance: IEC 60332-1-2 / PN-G-90100
Oil, grease & battery acid: Polychloroprene resistant to electrolytes
Mine water & perspiration: Resistant to moisture & body sweat
Ozone & ageing: Ozone-resistant EPR & PCP
Chemical exposure: Resistant to weak acids & alkalis
Halogen status: Polychloroprene elastomer

Reference standards

Primary product standard: PN-G-90104 / ZN-TF-209
Mining series base standard: PN-G-90100
Conductor standard: IEC 60228 Class 5 / Class 6
Flame test standard: PN-EN 60332-1-2
Core identification norm: PN-HD 308 S2
Quality certification: EN 10204 3.1 mill certificate

Identification

Core identification (2-core): Blue and brown
Core identification (3-core): Blue, brown, green/yellow
Outer sheath colour: Black
Surface marking: OnG-Szn [n×mm²] PN-G-90104
Packaging: 100 m coils or 500 m wooden drums
Batch traceability: Lot number & year code

Sizes

10 standard configurations (OnG-Szn)

Nominal dimensions, copper weights and electrical parameters for OnG-Szn per PN-G-90104 / ZN-TF-209.

Dimensions & weights
Order designation	Configuration	Phase size mm²	Outer Ø ≈ mm	Copper kg/km	Weight ≈ kg/km	Min. bend R fixed mm
Standard OnG-Szn configurations
OnG-Szn 2×1.0	2×1.0	1.0	8.2	19	88	33
OnG-Szn 2×1.5	2×1.5	1.5	9.2	29	112	37
OnG-Szn 2×2.5	2×2.5	2.5	10.8	48	158	43
OnG-Szn 2×4.0	2×4.0	4.0	12.6	77	225	50
OnG-Szn 2×6.0	2×6.0	6.0	14.2	115	305	57
OnG-Szn 3×1.0	3×1.0	1.0	8.8	29	105	35
OnG-Szn 3×1.5	3×1.5	1.5	9.8	43	135	39
OnG-Szn 3×2.5	3×2.5	2.5	11.6	72	195	46
OnG-Szn 3×4.0	3×4.0	4.0	13.5	115	280	54
OnG-Szn 3×6.0	3×6.0	6.0	15.4	173	385	62

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per PN-G-90104 / ZN-TF-209.

Electrical & ampacity data
Configuration	Max. DC R @ 20 °C Ω/km	Current rating in air (A)	Current rating installed (A)	Mutual C pF/m ≈	AC test V rms
2×1.0	19.500	15	13	79	2,000
2×1.5	13.300	19	16	80	2,000
2×2.5	7.980	26	22	82	2,000
2×4.0	4.950	35	30	84	2,000
2×6.0	3.300	45	38	87	2,000
3×1.0	19.500	15	13	79	2,000
3×1.5	13.300	19	16	80	2,000
3×2.5	7.980	26	22	82	2,000
3×4.0	4.950	35	30	84	2,000
3×6.0	3.300	45	38	87	2,000

Current ratings apply at +25/+30 °C ambient in free air; apply standard derating factors for elevated ambient or drum coiling.

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
AC voltage withstand test	2.0 kV rms for 5 minutes without breakdown	Every coil / drum
Conductor DC resistance	Complies with IEC 60228 Class 5 at 20 °C	100 % of production
Sample tests
Reverse flexing & cord pull test	No conductor strand break after 30,000 flexing cycles under load	Per batch
Flame propagation & electrolyte resistance	Passes PN-EN 60332-1-2, EN 60811-404 oil & battery acid test	Type approval

Inspection certificate

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

Product approvals

PN-G-90104 / PN-G-90100IEC 60332-1-2CE / RoHS

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX OnG-Szn [n×mm²] PN-G-90104 CE

Delivery form: Fumigated export wooden drums or coils
Standard drum lengths: 500 m · 1000 m (or custom cut lengths)
MOQ: 100 m (stock sizes) · 300–500 m (production)
Lead time: 2–4 weeks ex-works
Incoterms: EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFOnG-Szn Cable – technical datasheet10 sizes · construction, technical data, approvals XLSXOnG-Szn spec data (Excel)All 10 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 does 'Szn' mean in the OnG-Szn cable designation?

'Szn' is the abbreviation for 'sznur' (cord) under Polish mining standard PN-G-90104, distinguishing this compact 2-core and 3-core extra-flexible portable mining cord from larger multi-core OnG and OnG1 power and control cables. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

Why is OnG-Szn used for underground miner cap-lamps and portable instruments?

OnG-Szn combines fine-stranded copper conductors with a short lay pitch, internal strain-relief textile threads, and a polychloroprene outer sheath that resists battery acid, mineral oil, body sweat, and repeated sharp bending at cable glands. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

What is the voltage rating of OnG-Szn compared with OnG?

OnG-Szn is rated at 300/500 V (250 V nominal in underground mining circuits) and tested at 2.0 kV AC, whereas full-size OnG power cables are rated at 0.6/1 kV and tested at 3.0 kV AC. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

Can OnG-Szn be used for intrinsically safe underground signalling loops?

Yes, its compact twisted 2-core geometry provides low loop inductance and capacitance while the tough flame-retardant PCP sheath protects roadway pull-cord switches and intrinsically safe sensor leads from mechanical damage. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

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OnG-Szn Cable

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Reel & motion:
- Reel type: 
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Datasheet Request a quote

OnG-Szn CablePN-G-90104 · 300/500 V (250 V mining) · Twin-core (2×) · Extra-flexible Cu · EPR · PCP

Self-supporting pendant & push-button drop

Trailing & towing

Mine roadway & tunnel wall hangers

Fixed installation

Motorised monospiral reel

OnG-Szn 2× (1.0–2.5 mm²)

OnG-Szn 2× / 3× (2.5–6.0 mm²)

Electrical

Thermal

Mechanical

Resistance

Reference standards

Identification

Inspection certificate

Product approvals

Company certificates

01Selected sizes

02Reel & motion

03Message for our engineers

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