MSHA Tight-Buffer Breakout and Electro-Optic Mining Fiber Cable
Ruggedized underground mining tactical tight-buffer breakout fiber-optic cable (2 to 72 fibres) and hybrid electro-optic longwall communication-power cable engineered to ICEA S-104-696, TIA-568 and MSHA flame-resistance criteria. Each 900 um tight-buffered OS2, OM3 or OM4 fibre is reinforced with individual aramid strength yarns inside a 2.0 mm sub-unit for direct connector termination without fan-out kits, enclosed in a double-jacketed MSHA CPE/PU sheath. MOQ 50 m; lead time 7 to 45 working days.
While gel-filled loose-tube fiber cables serve static shaft and main drift backbones, dynamic longwall coal faces, portable mine load centres, leaky-feeder/Wi-Fi 6 base stations and mobile autonomous drill rigs require fiber-optic cables that tolerate repeated bending, reeling and direct field termination without messy gel cleaning or fragile breakout kits. MSHA Tight-Buffer Breakout and Electro-Optic Longwall Signal Mining Fiber Cable is engineered specifically for these high-flex underground and surface mining links.
In the Tight-Buffer Breakout series (2 to 72 fibres per ICEA S-104-696), each optical fibre (bend-insensitive ITU-T G.657.A2 / OS2 single-mode or OM3/OM4 laser-optimized multimode) is coated with a 900 um elastomeric tight buffer surrounded by its own high-modulus aramid yarn layer and an individual 2.0 mm colour-coded flame-retardant sub-unit jacket. Technicians can strip the outer MSHA double jacket and crimp LC, SC, ST or ruggedized expanded-beam connectors directly onto the 2.0 mm sub-units.
In the Hybrid Electro-Optic Longwall Signal series, 600 V / 1000 V Class K tinned copper power and pilot conductors (14 AWG to 6 AWG) are co-cabled with tight-buffer optical sub-units under a common reinforced MSHA CPE or polyurethane (PU) sheath to power and network face cameras, methane monitors, PLC nodes and roof-support controllers over a single cable. TEBAOFLEX supplies custom lengths from a 50 m MOQ with a 7 to 45 working day lead time.
Explore the mining and tunneling cable range for related configurations.
Construction
The representative horizontal sample illustrates the 12-Fibre MSHA Tight-Buffer Breakout & Electro-Optic Mining Cable architecture, showing individual 2.0 mm colour-coded aramid-reinforced 900 um tight-buffer optical sub-units (alongside optional Class K tinned copper power/pilot cores in the hybrid series) laid around a central GRP dielectric strength member, protected by an inner elastomeric cushion jacket, aramid/braid reinforcement and a heavy outer MSHA flame-retardant CPE/PU sheath.
| Component | Material and construction |
|---|---|
| Bend-Insensitive Optical Fibres (OS2 / OM3 / OM4) | ITU-T G.657.A2 / G.652.D single-mode OS2 or 50/125 um OM3/OM4 multimode optical fibres with 900 um easy-strip elastomeric tight buffer. |
| Individual 2.0 mm Aramid-Reinforced Sub-Units | Each 900 um buffered fibre is surrounded by high-tenacity aramid yarns and an individual 2.0 mm flame-retardant sub-unit jacket for direct connector termination. |
| Optional Hybrid Copper Power/Signal Cores (EO Series) | Flexible Class K tinned copper conductors (14 AWG to 6 AWG) with 90 C EPR insulation co-cabled for remote sensor/camera power and pilot interlocks. |
| Central Anti-Buckling Strength Member | Glass-fibre reinforced plastic (GRP) dielectric rod or elastomeric-overjacketed central member preventing axial buckling under temperature cycling. |
| Inner Cushioning Jacket & Aramid / Braid Armour | Extruded flame-retardant inner elastomeric jacket reinforced with high-modulus aramid yarns or synthetic anti-torsion braid (optional corrugated steel/braid rodent armour). |
| Outer MSHA Flame-Retardant CPE / PU Sheath | Extra-heavy-duty black, yellow or orange thermoset CPE, LSZH or abrasion-resistant polyurethane (PU) outer sheath passing MSHA 30 CFR Part 7/18 flame tests. |
Applications
Specify MSHA Tight-Buffer Breakout and Electro-Optic Mining Fiber Cable for rapid-deployment underground communications, longwall automation and powered optical sensor networks.
- Longwall shearer, armored face conveyor (AFC) and hydraulic roof-support electro-optic communication and 600 V/1000 V auxiliary power trunks.
- Underground mine Wi-Fi 6, LTE/5G, RFID personnel-tracking and gas-monitoring base stations requiring both DC/AC power and multi-fibre optical backhaul in one cable.
- Portable mine load centres, mobile substations and tunnel boring machine (TBM) PLC cabinets requiring direct ruggedized LC/SC/expanded-beam connector breakout.
- Rapid emergency mine rescue deployment, blast-zone camera links and mobile surface drill telemetry reels.
Related selection resources
- Mining and tunneling cable engineering solutions
- Mining cable drum dimensions, container loading and technical datasheet guide
- MSHA Loose-Tube Mining Fiber Optic Cable (6 to 144F)
- AS/NZS 1802 Type 245F and 241F Electro-Optic Mining Cable
- Crush-Resistant TC-ER 600V and 1kV Mining Power and Lighting Cable
Specifications
| Parameter | Value |
|---|---|
| Design standard reference | Engineered to ICEA S-104-696, TIA-568.3-D, ITU-T G.657.A2 / ISO/IEC 11801 and MSHA 30 CFR Part 7 / Part 18 flame criteria |
| Optical attenuation (max) | OS2 single-mode: max 0.40 dB/km at 1310 nm, max 0.30 dB/km at 1550 nm; OM3/OM4 multimode: max 3.0 dB/km at 850 nm, max 1.0 dB/km at 1300 nm |
| Tight-buffer breakout advantage | Individual 2.0 mm aramid-reinforced sub-units allow direct connectorization in underground enclosures without fragile breakout kits or gel solvent |
| Operating temperature range | -40 C to +85 C continuous operation (up to +90 C on thermoset CPE jacketed hybrid electro-optic variants) |
| Minimum bending radius | 10 x overall cable diameter static; 15 x overall cable diameter during dynamic reeling or installation pulling |
| Commercial supply terms | Minimum order quantity 50 m; manufacturing lead time 7 to 45 working days; supplied with 100% factory OTDR trace and continuity test reports |
| Selection boundary vs Loose-Tube Mining Fiber (6888) | Select Tight-Buffer Breakout / Electro-Optic (B306) for direct connector breakout, flexing and hybrid power+fiber; select Loose-Tube Fiber (6888) for static high-count (up to 144F) shaft/drift backbones. |
| Part Designation | Fibre Count | Internal Sub-Unit Architecture | Fibre Mode Options | Buffer Type | Nominal Overall O.D. (mm) | Approx. Net Mass (kg/km) | Max. Tensile Install / Long-Term (N) | Min. Static Bend Radius (mm) |
|---|---|---|---|---|---|---|---|---|
| MSHA-TB-BO 2F OS2/OM4 | 2 Fibres | 2 x 2.0 mm Aramid Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 9.8 | 92 | 2200 / 1100 | 98 |
| MSHA-TB-BO 4F OS2/OM4 | 4 Fibres | 4 x 2.0 mm Aramid Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 11.2 | 125 | 2700 / 1350 | 112 |
| MSHA-TB-BO 6F OS2/OM4 | 6 Fibres | 6 x 2.0 mm Aramid Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 12.8 | 165 | 3200 / 1600 | 128 |
| MSHA-TB-BO 8F OS2/OM4 | 8 Fibres | 8 x 2.0 mm Aramid Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 14.2 | 205 | 3600 / 1800 | 142 |
| MSHA-TB-BO 12F OS2/OM4 | 12 Fibres | 12 x 2.0 mm Aramid Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 16.8 | 285 | 4500 / 2250 | 168 |
| MSHA-TB-BO 16F OS2/OM4 | 16 Fibres | 16 x 2.0 mm Aramid Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 18.6 | 345 | 5000 / 2500 | 186 |
| MSHA-TB-BO 24F OS2/OM4 | 24 Fibres | 24 x 2.0 mm Aramid Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 21.8 | 470 | 6000 / 3000 | 218 |
| MSHA-TB-Dist 36F OS2/OM4 | 36 Fibres | 6 x 6F Tight-Buffer Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 17.4 | 310 | 4800 / 2400 | 174 |
| MSHA-TB-Dist 48F OS2/OM4 | 48 Fibres | 4 x 12F Tight-Buffer Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 18.2 | 340 | 5200 / 2600 | 182 |
| MSHA-TB-Dist 72F OS2/OM4 | 72 Fibres | 6 x 12F Tight-Buffer Sub-Units | OS2 / OM3 / OM4 | 900 µm Tight Buffer | 21.4 | 455 | 6000 / 3000 | 214 |
| Part Designation | Voltage + Optical Class | Hybrid Core & Sub-Unit Layout | Optical Fibre Mode | Nominal Overall O.D. (mm) | Approx. Net Mass (kg/km) | Max. Tensile Install / Long-Term (N) | Min. Static Bend Radius (mm) |
|---|---|---|---|---|---|---|---|
| MSHA-EO-LW 2x14 AWG + 4F TB | 600 V + Optical | 2 x 14 AWG + 4 x 2.0 mm Fibre Units | OS2 / OM4 | 13.6 | 235 | 3000 / 1500 | 136 |
| MSHA-EO-LW 4x14 AWG + 6F TB | 600 V + Optical | 4 x 14 AWG + 6 x 2.0 mm Fibre Units | OS2 / OM4 | 15.4 | 310 | 3500 / 1750 | 154 |
| MSHA-EO-LW 2x12 AWG + 6F TB | 600 V + Optical | 2 x 12 AWG + 6 x 2.0 mm Fibre Units | OS2 / OM4 | 14.8 | 285 | 3500 / 1750 | 148 |
| MSHA-EO-LW 4x12 AWG + 12F TB | 600 V + Optical | 4 x 12 AWG + 12 x 2.0 mm Fibre Units | OS2 / OM4 | 18.2 | 440 | 4500 / 2250 | 182 |
| MSHA-EO-LW 4x10 AWG + 12F TB | 600 V + Optical | 4 x 10 AWG + 12 x 2.0 mm Fibre Units | OS2 / OM4 | 19.8 | 545 | 4800 / 2400 | 198 |
| MSHA-EO-LW 6x12 AWG + 12F TB | 600 V + Optical | 6 x 12 AWG + 12 x 2.0 mm Fibre Units | OS2 / OM4 | 20.4 | 580 | 5000 / 2500 | 204 |
| MSHA-EO-LW 3x8 AWG + 1x10 + 12F TB | 1000 V + Optical | 3 x 8 AWG + 10 GND + 12F Unit | OS2 / OM4 | 21.6 | 690 | 5500 / 2750 | 216 |
| MSHA-EO-LW 3x6 AWG + 1x8 + 12F TB | 1000 V + Optical | 3 x 6 AWG + 8 GND + 12F Unit | OS2 / OM4 | 23.8 | 875 | 6000 / 3000 | 238 |
Specify fibre mode (OS2 G.657.A2 single-mode, OM3 50/125 um, OM4 50/125 um or mixed hybrid OS2+OM4) and outer jacket colour (black, yellow, orange or aqua) when ordering.
Factory pre-terminated assemblies with ruggedized IP68 mining optical connectors or breakout tails are available upon engineering request.
Standards
| Standard or specification | Application |
|---|---|
| ICEA S-104-696 & TIA-568.3-D | Standard for indoor-outdoor optical fiber cable mechanical crush, cyclic flex, impact and tensile performance. |
| ITU-T G.657.A2 & ISO/IEC 11801 | Bend-insensitive single-mode OS2 and laser-optimized OM3/OM4 multimode optical transmission standards. |
| ICEA S-75-381 / UL 1277 | Hybrid copper power/control and optical-fiber member dielectric and physical separation compliance. |
| MSHA 30 CFR Part 7 / Part 18 | Flame-resistance acceptance test criteria for underground coal and metal/non-metal mine optical and composite cables. |
Certifications and document support
TEBAOFLEX company certificates and quality system documentation
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AS/NZS 1802 Type 245F and 241F Electro-Optic Mining Cable
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SHD-CGC FOM 5 kV Mining Power Cable with Multimode Fibres
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