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Product

MSHA double-jacketed VHF/UHF mining leaky feeder cable MSHA 30 CFR Approved75 ± 3 Ω VHF/UHFDouble-Jacketed Radiating

RNG-350 75-Ohm MSHA Mining Leaky Feeder Coaxial CableRNG-350 75-Ohm MSHA-approved double-jacketed radiating leaky feeder coaxial cable for underground mine VHF/UHF radio and tracking, with a 2.31 mm solid bare copper core, foamed PE dielectric, 16 helical radiating wires and yellow MSHA FR-PVC jacket.

Engineered for underground mining, open-cast excavation, shaft infrastructure and heavy industrial service per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196 across -30 to +80 °C.

EMC screen

Flame-retardant

Water-resistant

Approved

Configuration

Order designation: RNG-350 75-Ohm Double-Jacketed Yellow MSHA
Outer Ø ≈: 14.5 mm
Net weight ≈: 212 kg/km
Tensile rating ≈: 1.2 kN
Core / stranding: Solid Cu + 16×23 AWG screen

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 +80 °C
Min. bend radius: 12 × OD
Core / conductor: Ø 2.31 mm Cu
Outer protection: PE + MSHA Yellow
Standard: MSHA / 75 Ω

Typical values for this cable type, based on MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196 — confirmed in the datasheet and quotation for your order.

Application fit

Is RNG-350 right for your machine?

Engineered for underground mining, open-cast excavation, shaft infrastructure and heavy industrial service per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196 across -30 to +80 °C.

Mine roadway & tunnel wall hangers

Suitable

Engineered for underground mining shafts, galleries and tunnel infrastructure per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196.

Fixed installation

Suitable

Suitable for vertical shaft cleats, gallery messenger hooks and tray routing within 12 × OD.

Free-hanging vertical run

Suitable

Supports inclined roadway and vertical mine shaft suspension within rated kN load across -30 to +80 °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: RNG-350 (MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196) featuring inner center conductor (ø 2.31 mm), foamed pe dielectric (ø 10.06 mm) and msha yellow outer mining jacket (5-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Inner Center Conductor (Ø 2.31 mm)	Solid soft-drawn bare copper center conductor
2	Foamed PE Dielectric (Ø 10.06 mm)	High-velocity semi-air-spaced foamed polyethylene insulation (75 ± 3 Ω)
3	Helical Radiating Outer Conductor	16 × 23 AWG spaced bare copper wires for 360° VHF/UHF RF coupling
4	Binder Tape & Black PE Inner Jacket	Adhesive polyester film tape + black polyethylene moisture-barrier jacket
5	MSHA Yellow Outer Mining Jacket	High-visibility yellow MSHA flame-resistant low-smoke PVC jacket

RNG-350 — Standard Mining Execution

Built to MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196 with inner center conductor (ø 2.31 mm) and msha yellow outer mining jacket

RNG-350 — Custom Drum Length & Gland Kit

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

RNG-350 — 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 MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: 300 V (MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196)
Core / conductor construction: Inner Center Conductor (Ø 2.31 mm) — Solid soft-drawn bare copper center conductor
Primary dielectric / buffering: Foamed PE Dielectric (Ø 10.06 mm) — High-velocity semi-air-spaced foamed polyethylene insulation (75 ± 3 Ω)

Thermal

Continuous operating temperature: -30 to +80 °C (mining & industrial service)
Short-circuit / peak thermal rating: Verified thermal stability per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196
Storage & transport temperature: −40…+80 °C on export wooden/steel drum

Mechanical

Outer protection / armouring: MSHA Yellow Outer Mining Jacket — High-visibility yellow MSHA flame-resistant low-smoke PVC jacket
Minimum bending radius: 12 × OD
Crush, impact & abrasion duty: Heavy-duty mining rock-cut, impact and tensile protection per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196

Resistance

Flame retardancy & mine fire safety: Self-extinguishing / flame-retardant mining jacket per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196
Mine water, oil & chemical resistance: Resistant to acidic mine water, hydraulic oils and abrasion per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196
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: RNG-350
Sheath colour & metre marking: Continuous metre-marked yellow mining outer sheath
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard RNG-350 mining & industrial configurations

Manufactured to MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196 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
RNG-350 Construction Schedule (-30 to +80 °C)
RNG-350 75-Ohm Double-Jacketed Yellow MSHA	Ø 2.31 mm Cu / Ø 10.06 mm Foam PE	Solid Cu + 16×23 AWG screen	14.5	212	1.2	175
RNG-350M 75-Ohm Figure-8 with Steel Messenger	Ø 2.31 mm Cu + Ø 3.2 mm Steel Strand	Solid Cu + Galvanized Messenger	21.8	310	6.5	200
RNG-500 75-Ohm Low-Loss Main Haulage Trunk	Ø 3.12 mm Cu / Ø 13.2 mm Foam PE	Solid Cu + 16×22 AWG screen	17.8	305	1.7	215

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 MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
RNG-350 Standard (150 / 450 MHz)	4.20	3.1 / 6.2 dB/100m · 82% Vf	-30 to +80 °C
RNG-350M Messenger (150 / 450 MHz)	4.20	3.1 / 6.2 dB/100m · 82% Vf	-30 to +80 °C
RNG-500 Low-Loss (150 / 450 MHz)	2.35	2.2 / 4.5 dB/100m · 84% Vf	-30 to +80 °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 (MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196)	DC resistance at 20 °C / optical attenuation and outer diameter within MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196 tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196)	Zero dielectric breakdown and verified insulation resistance over full production length	Every manufactured drum length
Sample tests
Flame propagation, mechanical crush & thermal ageing qualification (MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196)	Verified flame retardancy, mechanical integrity and thermal endurance across -30 to +80 °C	Type qualification & periodic lot audit

Inspection certificate

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

Product approvals

MSHA / 75 Ω 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 RNG-350 MSHA / 75 Ω 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

PDFRNG-350 75-Ohm MSHA Mining Leaky Feeder Coaxial Cable – technical datasheet3 sizes · construction, technical data, approvals XLSXRNG-350 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 RNG-350 (RNG-350 75-Ohm MSHA Mining Leaky Feeder Coaxial Cable)?

RNG-350 (RNG-350 75-Ohm MSHA Mining Leaky Feeder Coaxial Cable) is manufactured in accordance with MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196 for 300 V duty over -30 to +80 °C. Its 5-layer construction comprises Inner Center Conductor (Ø 2.31 mm), Foamed PE Dielectric (Ø 10.06 mm) and MSHA Yellow Outer Mining Jacket.

What is the minimum bending radius and operating temperature range for RNG-350?

The minimum bending radius for RNG-350 is 12 × OD across its continuous operating temperature range of -30 to +80 °C, ensuring mechanical and dielectric reliability in mining and heavy industrial service.

How are the concentric layers of RNG-350 arranged from inside to outside?

From inside to outside, the construction sequence is: (01) Inner Center Conductor (Ø 2.31 mm) (Solid soft-drawn bare copper center conductor); (02) Foamed PE Dielectric (Ø 10.06 mm) (High-velocity semi-air-spaced foamed polyethylene insulation (75 ± 3 Ω)); (03) Helical Radiating Outer Conductor (16 × 23 AWG spaced bare copper wires for 360° VHF/UHF RF coupling); (04) Binder Tape & Black PE Inner Jacket (Adhesive polyester film tape + black polyethylene moisture-barrier jacket); (05) MSHA Yellow Outer Mining Jacket (High-visibility yellow MSHA flame-resistant low-smoke PVC jacket).

What factory test certificates are supplied with RNG-350?

Every production drum of RNG-350 undergoes routine conductor resistance/continuity, high-voltage dielectric and dimensional testing per MSHA 30 CFR Part 7 / MIL-C-17 / IEC 61196, and is delivered with an EN 10204 3.1 factory test certificate.

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01Selected sizes

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02Reel & motion

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03Message for our engineers

RNG-350 75-Ohm MSHA Mining Leaky Feeder Coaxial 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: 
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