Type 240 Underground Coal Mine Cable for General Mine Power
Type 240 underground coal mine cable is a multi-voltage power cable family for general underground coal-mine circuits, excluding shuttle-car applications. The supplied construction uses three screened phase conductors plus three interstitial pilot cores, allowing the power and pilot circuits to be specified as one cable assembly. Four voltage variants cover 1.1/1kV through 11/11kV, so buyers should select the voltage type before selecting conductor area or cable diameter.
Quick Suitability Check
| Suitable for | General underground coal-mine power circuits, except shuttle cars, where the supplied Type 240 construction and voltage grade are appropriate. |
|---|---|
| Confirm before use | System voltage, conductor area, route length, voltage drop, pilot function, termination, mechanical duty and site requirements. |
| Not established by supplied data | Minimum bend radius, tensile load, reeling/trailing cycle life, temperature range, oil/water/UV performance and formal hazardous-area approval. |
Engineering Features
- Four voltage grades: The family is shown as Type 240.1, 240.3, 240.6 and 240.11, enabling the cable design to be matched to the mine distribution voltage.
- Screened phase cores: Each phase core has a tinned copper/nylon braided screen, which should be bonded and terminated in accordance with the equipment and site electrical design.
- Three pilot cores: Interstitial pilots provide separate low-current conductors within the cable assembly; their control, monitoring or interlock function must be confirmed by the machine or mine electrical specification.
- Semiconductive cradle: The phase cores are laid around a semiconductive cradle rather than directly against one another, maintaining the intended cable geometry.
- Heavy-duty elastomeric sheath: The source identifies an elastomeric outer sheath; final environmental and mechanical limits require project confirmation.
Technical Specifications
| Product type | Type 240 underground coal mine cable |
|---|---|
| Core configuration | 3 phase cores + 3 interstitial pilot cores |
| Voltage / test voltage | 240.1: 1.1/1kV / 4.2kV; 240.3: 3.3/3.3kV / 12kV; 240.6: 6.6/6.6kV / 22kV; 240.11: 11/11kV / 30kV |
| Conductor | Electrolytic, flexible multi-stranded circular tinned copper wire (rope lay), AS/NZS 1125.2.10 |
| Separator layers | Semiconductive layer for 3.3/3.3kV and above, except pilot cores |
| Insulation | R-EP-90, referenced to AS/NZS 3808 |
| Phase-core screen | Tinned copper / nylon braid |
| Lay-up | Phase cores laid over a semiconductive cradle; phase cores do not contact each other and contact the interstitial pilot cores |
| Outer sheath | Heavy-duty elastomeric outer sheath, referenced to AS/NZS 3808 |
| Standard reference | AS/NZS 1802 |
Cable Construction
The supplied cross-section and cutaway illustrate three screened phase conductors together with three smaller pilot conductors. The visible braid belongs to the phase-core screen; it is not a substitute for verifying the intended earthing and bonding arrangement at the equipment termination.
- Conductor: flexible stranded tinned copper phase conductors.
- Separator and insulation: semiconductive layers where specified and R-EP-90 insulation.
- Phase-core screen: tinned copper/nylon braid over each phase core.
- Pilot system: three interstitial pilot cores among the phase cores.
- Lay-up and sheath: semiconductive cradle and heavy-duty elastomeric outer sheath.
Dimensions and Weight
The following selection table reproduces the supplied nominal dimensions. It is an ordering aid; confirm the final cable schedule and any full electrical data required for the project before release.
| Type | Nominal area | Insulation thickness | Nominal cable diameter | Nominal weight |
|---|---|---|---|---|
| 240.1 | 6 / 10 / 16 / 25 / 35 / 50 / 70 / 95 / 120 / 150 / 185 / 240 / 300mm² | 1.5 / 1.5 / 1.6 / 1.6 / 1.6 / 1.7 / 1.8 / 2.0 / 2.1 / 2.3 / 2.5 / 2.8 / 3.0mm | 30.0 / 32.6 / 35.8 / 39.7 / 53.6 / 48.4 / 54.0 / 58.8 / 64.6 / 70.3 / 77.5 / 86.1 / 95.2mm | 131 / 159 / 202 / 265 / 326 / 404 / 533 / 635 / 775 / 940 / 1140 / 1410 / 1775kg/100m |
| 240.3 | 16 / 25 / 35 / 50 / 70 / 95 / 120 / 150 / 185 / 240mm² | 3.0mm | 46.7 / 50.6 / 54.0 / 58.1 / 63.0 / 66.7 / 72.6 / 78.6 / 83.8 / 90.8mm | 306 / 379 / 444 / 525 / 656 / 750 / 910 / 1115 / 1280 / 1540kg/100m |
| 240.6 | 16 / 25 / 35 / 50 / 70 / 95 / 120 / 150 / 185 / 240mm² | 5.0mm | 57.9 / 61.7 / 65.2 / 69.0 / 74.3 / 78.3 / 83.5 / 89.5 / 95.1 / 101.8mm | 440 / 521 / 593 / 685 / 830 / 954 / 1111 / 1335 / 1515 / 1788kg/100m |
| 240.11 | 25 / 35 / 50 / 70 / 95 / 120 / 150mm² | 7.6mm | 76.0 / 80.1 / 84.0 / 89.1 / 94.1 / 99.9 / 104.0mm | 752 / 860 / 961 / 1125 / 1300 / 1470 / 1659kg/100m |
Manual review: the supplied 240.1 row for 35mm² shows 53.6mm nominal diameter, while the following 50mm² row shows 48.4mm. This may be a source-table anomaly; confirm the 35mm² outer diameter before production or replacement ordering.
Applications
The stated application is general use in underground coal mines, excluding shuttle cars. The supplied reference also identifies use in underground mine environments where explosive gases and dust may accumulate. This application statement does not by itself confirm hazardous-area approval, so the mine’s electrical and safety requirements must be checked for every installation.
Selection Notes for Buyers
- Select Type 240.1, 240.3, 240.6 or 240.11 from the system voltage, then select conductor area from load current and permissible voltage drop.
- Check the nominal outer diameter and mass against cable-route space, supports and handling equipment.
- Confirm the three pilot-core purpose and its termination at both ends before substituting another cable family.
- Do not treat the general underground-mine application as proof of Ex or hazardous-area certification; request the project’s required approval and documentation separately.
- For a replacement, provide the complete sheath marking, voltage type, conductor area, pilot details and a photo of the termination.
Request a Type 240 Technical Quotation
Please provide the exact Type 240 voltage grade, conductor size, length, quantity, equipment, installation method, pilot-core function, mine environment and required standard, inspection or marking documentation. TEBAOFLEX can then review the requested construction and delivery configuration.
FAQ
What is Type 240 underground coal mine cable used for?
Type 240 underground coal mine cable is specified for general underground coal-mine power circuits, excluding shuttle cars, with three screened phase cores and three interstitial pilot cores.
Which voltage types are available?
The supplied reference lists Type 240.1 at 1.1/1kV, Type 240.3 at 3.3/3.3kV, Type 240.6 at 6.6/6.6kV and Type 240.11 at 11/11kV.
Does Type 240 have pilot cores?
Yes. The construction includes three interstitial pilot cores. Their required control or monitoring function must be confirmed with the mine electrical specification.
Is Type 240 automatically approved for every hazardous mine area?
No. The source refers to underground mines where gases and dust may accumulate, but does not supply a hazardous-area approval or certificate. Confirm project requirements before use.
Continue the mining cable selection: For the full Mining & Tunneling Cables range and application guidance, see Mining and Tunneling Cable Solutions. For the related screened coal-mine feeder family, compare Type 241 Mining Cable; for a fixed feeder with ground-check monitoring, review Type MP-GC 15kV Mine Power Feeder Cable. Send the equipment, voltage and route details for an RFQ.