Application & Operating Conditions
50 V Underground Longwall Mining Signal Cable is designed for intrinsically safe and low-voltage control, telemetry, methane/airflow monitoring, electrohydraulic roof-support shield interconnects, conveyor pull-cord lockout switches, and voice/audio paging lines along underground longwall faces and gate roads. Chemically cross-linked, non-chlorinated flame-retardant polyolefin core insulation prevents conductor pinch-through under falling coal/rock, while the extra-tough thermoplastic polyurethane (TPU) jacket outlasts conventional PVC or rubber control cables by 3× to 5× in abrasive pan-line service.
Longwall Roof-Support & E-Stop Lines
Connects shield controller pods, solenoid valves, conveyor pull-key lockout switches, and face communication boxes across dynamic advancing longwall panels.
XL-FR Polyolefin + Extra-Tough TPU
Thermosetting non-chlorinated cross-linked polyolefin resists soldering/crush deformation, paired with high-tear-strength TPU in black or high-visibility safety orange.
Optional Full Copper Braid Shielding
Available with a full-coverage flexible copper wire braid beneath the TPU jacket for EMI immunity alongside high-horsepower shearer and VFD power cables.
Need 110 V Permissible Underground Mine Lighting Circuits? For 110 V AC/DC longwall face luminaires and drift lighting strings, select our companion 110V Underground Mine Lighting Cable (2–9C TPU).
Cable Construction (50 V Multi-Core XL-Polyolefin / Extra-Tough TPU)
Compact round multi-conductor signal architecture engineered for relentless flexing, pinch impact, and moisture exposure in underground coal and hard-rock mines.
| Layer / Component | Material & ASTM B-174 / Underground Mining TPU Engineering Specification |
|---|---|
| 1. Signal Conductors (2–9×) | Extra-flexible bunch-stranded annealed copper conductors manufactured to ASTM B-174 in 18 AWG, 16 AWG, 14 AWG, 12 AWG, and 10 AWG. |
| 2. XL-FR Polyolefin Insulation | Chemically cross-linked, non-chlorinated thermosetting flame-retardant polyolefin (+90°C rated) offering high cut-through resistance and crisp color coding. |
| 3. Round Cabled Core & Wrap | 2 to 9 insulated conductors concentrically cabled into a round profile with non-wicking fillers (where required) and a smooth core separator binder tape. |
| 4. Optional Copper Braid Shield | Full flexible copper wire braid shield available upon request for high-EMI longwall pan-line troughs and shearer proximity zones. |
| 5. Extra-Tough TPU Outer Jacket | Abrasion-, tear-, oil-, and water-resistant Thermoplastic Polyurethane (TPU) jacket in standard Black or high-visibility Safety Orange (±5% OD tolerance). |
50V Longwall Signal Cable cross-section (7-conductor example): ASTM B-174 flexible copper cores, cross-linked FR polyolefin insulation, binder wrap (optional full Cu braid), and extra-tough TPU sheath.
Technical Characteristics
Electrical, thermal, dimensional tolerance, and material parameters for 50 V Longwall Mining Signal Cable.
| Parameter | ASTM B-174 / Underground Mining TPU Rated Value |
|---|---|
| Rated Voltage | 50 V AC / DC underground mining signal, telemetry, and control circuits |
| Conductor Counts & Sizes | 2, 3, 4, 5, 6, 7, 8, or 9 conductors across 18 AWG, 16 AWG, 14 AWG, 12 AWG, and 10 AWG |
| Temperature Rating | +90°C maximum continuous conductor operating temperature |
| Conductor Standard | ASTM B-174 extra-flexible bunch-stranded copper |
| Shielding & Jacket Options | Unshielded standard or full copper braid on request | Black TPU standard; Orange TPU optional |
| Outside Diameter Tolerance | ±5% of nominal overall cable diameter |
50 V Longwall Signal Cable Dimensions & Weights (18 AWG to 10 AWG, 2–9 Cores)
Complete 40-size engineering matrix covering 18, 16, 14, 12, and 10 AWG in 2-conductor through 9-conductor builds (dual imperial and metric units).
Table 1: 18 AWG (0.82 mm²) & 16 AWG (1.31 mm²) — 50 V Longwall Signal Cable (2 to 9 Conductors)
| Construction | Core Area (mm²) | Conductors | Insulated Core OD (in / mm) | Nominal Cable OD (in / mm) | Approx. Weight (lb/kft / kg/km) |
|---|---|---|---|---|---|
| 2 × 18 AWG | 0.82 | 2 | 0.115 / 2.9 | 0.440 / 11.2 | 87 / 129 |
| 3 × 18 AWG | 0.82 | 3 | 0.115 / 2.9 | 0.460 / 11.7 | 100 / 149 |
| 4 × 18 AWG | 0.82 | 4 | 0.115 / 2.9 | 0.490 / 12.4 | 117 / 174 |
| 5 × 18 AWG | 0.82 | 5 | 0.115 / 2.9 | 0.520 / 13.2 | 136 / 202 |
| 6 × 18 AWG | 0.82 | 6 | 0.115 / 2.9 | 0.560 / 14.2 | 156 / 232 |
| 7 × 18 AWG | 0.82 | 7 | 0.115 / 2.9 | 0.560 / 14.2 | 163 / 243 |
| 8 × 18 AWG | 0.82 | 8 | 0.115 / 2.9 | 0.630 / 16.0 | 197 / 293 |
| 9 × 18 AWG | 0.82 | 9 | 0.115 / 2.9 | 0.660 / 16.8 | 215 / 320 |
| 2 × 16 AWG | 1.31 | 2 | 0.125 / 3.2 | 0.460 / 11.7 | 99 / 147 |
| 3 × 16 AWG | 1.31 | 3 | 0.125 / 3.2 | 0.480 / 12.2 | 114 / 170 |
| 4 × 16 AWG | 1.31 | 4 | 0.125 / 3.2 | 0.510 / 13.0 | 133 / 198 |
| 5 × 16 AWG | 1.31 | 5 | 0.125 / 3.2 | 0.550 / 14.0 | 158 / 235 |
| 6 × 16 AWG | 1.31 | 6 | 0.125 / 3.2 | 0.590 / 15.0 | 183 / 272 |
| 7 × 16 AWG | 1.31 | 7 | 0.125 / 3.2 | 0.590 / 15.0 | 190 / 283 |
| 8 × 16 AWG | 1.31 | 8 | 0.125 / 3.2 | 0.660 / 16.8 | 225 / 335 |
| 9 × 16 AWG | 1.31 | 9 | 0.125 / 3.2 | 0.690 / 17.5 | 247 / 368 |
Table 2: 14 AWG (2.08 mm²) & 12 AWG (3.31 mm²) — 50 V Longwall Signal Cable (2 to 9 Conductors)
| Construction | Core Area (mm²) | Conductors | Insulated Core OD (in / mm) | Nominal Cable OD (in / mm) | Approx. Weight (lb/kft / kg/km) |
|---|---|---|---|---|---|
| 2 × 14 AWG | 2.08 | 2 | 0.140 / 3.6 | 0.490 / 12.4 | 118 / 176 |
| 3 × 14 AWG | 2.08 | 3 | 0.140 / 3.6 | 0.510 / 13.0 | 138 / 205 |
| 4 × 14 AWG | 2.08 | 4 | 0.140 / 3.6 | 0.550 / 14.0 | 166 / 247 |
| 5 × 14 AWG | 2.08 | 5 | 0.140 / 3.6 | 0.590 / 15.0 | 196 / 292 |
| 6 × 14 AWG | 2.08 | 6 | 0.140 / 3.6 | 0.630 / 16.0 | 225 / 335 |
| 7 × 14 AWG | 2.08 | 7 | 0.140 / 3.6 | 0.630 / 16.0 | 238 / 354 |
| 8 × 14 AWG | 2.08 | 8 | 0.140 / 3.6 | 0.710 / 18.0 | 278 / 414 |
| 9 × 14 AWG | 2.08 | 9 | 0.140 / 3.6 | 0.750 / 19.0 | 300 / 446 |
| 2 × 12 AWG | 3.31 | 2 | 0.160 / 4.1 | 0.526 / 13.4 | 148 / 220 |
| 3 × 12 AWG | 3.31 | 3 | 0.160 / 4.1 | 0.555 / 14.1 | 177 / 263 |
| 4 × 12 AWG | 3.31 | 4 | 0.160 / 4.1 | 0.596 / 15.1 | 213 / 317 |
| 5 × 12 AWG | 3.31 | 5 | 0.160 / 4.1 | 0.642 / 16.3 | 254 / 378 |
| 6 × 12 AWG | 3.31 | 6 | 0.160 / 4.1 | 0.690 / 17.5 | 297 / 442 |
| 7 × 12 AWG | 3.31 | 7 | 0.160 / 4.1 | 0.690 / 17.5 | 316 / 470 |
| 8 × 12 AWG | 3.31 | 8 | 0.160 / 4.1 | 0.770 / 19.6 | 388 / 577 |
| 9 × 12 AWG | 3.31 | 9 | 0.160 / 4.1 | 0.815 / 20.7 | 426 / 634 |
Table 3: 10 AWG (5.26 mm²) Heavy Valve & Solenoid Bus Series — 50 V Longwall Signal Cable (2 to 9 Conductors)
| Construction | Core Area (mm²) | Conductors | Insulated Core OD (in / mm) | Nominal Cable OD (in / mm) | Approx. Weight (lb/kft / kg/km) |
|---|---|---|---|---|---|
| 2 × 10 AWG | 5.26 | 2 | 0.180 / 4.6 | 0.570 / 14.5 | 186 / 277 |
| 3 × 10 AWG | 5.26 | 3 | 0.180 / 4.6 | 0.598 / 15.2 | 226 / 336 |
| 4 × 10 AWG | 5.26 | 4 | 0.180 / 4.6 | 0.645 / 16.4 | 276 / 411 |
| 5 × 10 AWG | 5.26 | 5 | 0.180 / 4.6 | 0.696 / 17.7 | 331 / 493 |
| 6 × 10 AWG | 5.26 | 6 | 0.180 / 4.6 | 0.750 / 19.0 | 391 / 582 |
| 7 × 10 AWG | 5.26 | 7 | 0.180 / 4.6 | 0.750 / 19.0 | 462 / 688 |
| 8 × 10 AWG | 5.26 | 8 | 0.180 / 4.6 | 0.835 / 21.2 | 519 / 772 |
| 9 × 10 AWG | 5.26 | 9 | 0.180 / 4.6 | 0.875 / 22.2 | 626 / 932 |
Underground Signal, Lighting, VFD & Control Cable Matrix
Select between 50 V Longwall Signal, 110 V Underground Lighting, 2 kV Symmetrical VFD, and composite power-control cables.
| Mining Cable Model | Voltage Class, Ground / Shield Architecture & Primary Mining Duty |
|---|---|
| Mining VFD 2kV (3+3+GC) | Symmetrical 3 power + 3 green grounds + yellow GC (2 AWG–500 kcmil) with 100% Al/polyester foil + overall tinned copper braid EMC shield for AC variable-frequency mine drives. |
| Blast-Hole Drilling Mast (600–2000V) | High-flex round hybrid cable combining 2 EPR power cores (1/0–500 kcmil) + tinned ground + user-configurable multi-core control group for rotary drill masts, festoons, and loops. |
| Longwall Signal Cable (50V TPU) | Extra-flexible 50 V underground control & signal cable (2–9 cores, 18 to 10 AWG) with cross-linked FR polyolefin insulation, extra-tough TPU jacket, and optional copper braid. |
| Underground Lighting Cable (110V TPU) | Heavy-duty 110 V mine luminaire & drift lighting cable (2–9 cores, 18 to 10 AWG) with non-chlorinated cross-linked FR polyolefin insulation and cut-resistant TPU outer sheath. |
| Type SHD-PCG (2kV & 5kV) | Shielded 3-phase power + 2 integrated control/pilot cores + ground trailing cable for continuous miners and longwall face equipment. |
Frequently Asked Questions (FAQ)
Answers to longwall electrical questions on non-chlorinated cross-linked polyolefin insulation, orange vs. black TPU, and braided EMI shielding.
Why does TEBAOFLEX use chemically cross-linked non-chlorinated FR polyolefin instead of PVC on the signal cores?
Cross-linked thermosetting polyolefin will not melt or cold-flow when pinched under roof-shield hydraulic hoses or hot overloads (+90°C continuous rating), and its non-chlorinated formulation reduces corrosive acid gas release in confined underground workings.
When should we choose 14–10 AWG versus 18–16 AWG in a 50V longwall signal cable?
18 AWG and 16 AWG are ideal for short shield-to-shield jumper harnesses, pull-cord switches, and digital RS-485/CAN telemetry; 14 AWG, 12 AWG, and 10 AWG minimize DC voltage drop across 250 m to 450 m full-face solenoid power buses and paging trunk lines.
Can we order high-visibility safety orange TPU with MSHA-compliant flame resistance?
Yes. Both standard Black TPU and high-visibility Safety Orange TPU outer jackets are compounded with flame-retardant mining-grade polyurethane elastomers and can be custom-printed with sequential footage markers.
Request a 50V Longwall Mining Signal Cable Quote
Specify conductor gauge (18, 16, 14, 12, or 10 AWG), core count (2 to 9 conductors), black or orange TPU jacket, and unshielded or copper-braided option.
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