Mining operations — surface and underground — place extreme demands on wire and cable. Equipment moves constantly, cables are dragged across rock and through water, and every conductor must meet strict MSHA (Mine Safety and Health Administration) flame-resistance and grounding requirements. A single longwall section, dragline, or shovel can require thousands of feet of heavy-duty trailing cable rated for repeated reeling and mechanical abuse. Equipment types vary significantly between coal mining (e.g., longwall systems, continuous miners) and hard rock or open-pit mining (e.g., haul trucks, electric shovels, crushers).
Ramcorp Wire & Cable supplies the full range of mining cable, portable cord, tray cable, and medium-voltage cable used across surface mining, underground mining, and mineral processing. For product selection details, see our Mining Cable Guide.
Cable Types Used in Mining
Mining cable requirements span portable power for mobile equipment, permanent power distribution, motor drives, process control, and safety systems. The table below covers the primary cable types, their function, and where they are installed across mining operations.
| Cable Type | Function | Common Specs | Where It's Installed |
|---|---|---|---|
| Type G / G-GC Mining Cable | Portable power for mobile mining equipment up to 2 kV | 8 AWG – 4/0 AWG, 2 kV, 3–4 conductor + ground, CPE or EPDM jacket, MSHA accepted | Shuttle cars, continuous miners, roof bolters, feeder-breakers, mobile crushers |
| Type SHD-GC Mining Cable | Portable power for large mobile equipment up to 25 kV | 6 AWG – 4/0 AWG, 5 kV – 25 kV, shielded, ground check conductor, CPE jacket | Draglines, electric shovels, longwall shearers, highwall miners |
| Type W Portable Power Cable | Extra-hard-usage portable power cord commonly used in mining and industrial applications | 8 AWG – 4/0 AWG, 600V – 2 kV, 2–5 conductor, heavy rubber jacket | Portable substations, temporary power, pumps, auxiliary equipment |
| Portable Cord (SOOW / Type W) | Temporary power, tools, lighting, smaller mobile equipment | 12 AWG – 2/0 AWG, 600V, flexible rubber jacket | Underground lighting strings, hand tools, pumps, ventilation fans |
| DLO (Diesel Locomotive Cable) | Flexible single-conductor power cable for high-ampacity connections | 6 AWG – 2000 kcmil, 2 kV, extra-flexible Class K stranding, EPDM insulation | Motor leads, generator connections, battery cables, and applications similar to welding cable where higher voltage rating or durability is required |
| Medium-Voltage Cable (MV-105) | Permanent power distribution from substation to load centers | 5 kV – 35 kV, 1/0 AWG – 500 kcmil, copper or aluminum | Duct banks, underground feeders, surface substations, pit distribution |
| Tray Cable (TC-ER) | Power and control in cable tray at fixed plant facilities | 14 AWG – 2/0 AWG, 600V, sunlight resistant | Processing plants, wash plants, conveyor galleries, MCC buildings |
| VFD Cable | Variable-frequency drive circuits for conveyors, pumps, fans, crushers | Shielded, symmetrical ground, 600V – 2 kV | Drive output to conveyor motors, slurry pumps, ventilation fans, mill drives |
| Instrumentation Cable | Process monitoring, SCADA, environmental sensors, conveyor control | 16–22 AWG, twisted pair/triad, foil + braid shield, 300V | Between field instruments and PLC/DCS cabinets in processing plants |
| Building Wire (THHN / XHHW-2) | Branch circuits, lighting, panel feeders in surface buildings | 14 AWG – 750 kcmil, 600V, 90°C | Offices, maintenance shops, warehouses, lamp houses, control rooms |
| High-Temperature Cable | Circuits in elevated ambient temperature zones | FEP, PTFE, silicone, or cross-linked insulation, rated 150°C–250°C+ | Smelters, kilns, dryers, furnace areas in mineral processing |
| Thermocouple Wire | Temperature measurement in mineral processing | Type J, K, T, or E, matched conductor alloys, shielded | Kilns, roasters, autoclaves, heap leach systems |
Cable by Sector: Surface, Underground & Processing
Cable requirements vary depending on the type of mining operation. The table below maps common cable types to each sector and the conditions driving product selection.
| Sector | Typical Operations | Primary Cable Types | Key Considerations |
|---|---|---|---|
| Surface Mining | Open pit, strip mining, quarries, oil sands, mountaintop removal | SHD-GC (draglines, shovels), Type G/W (mobile equipment), MV cable, DLO, portable cord | Long trailing cable runs, UV/weather exposure, mechanical abuse from dragging, reeling systems |
| Underground Mining | Longwall, room-and-pillar, continuous mining, shaft mining | Type G-GC (continuous miners, shuttle cars), Type W, portable cord, DLO | MSHA flame resistance (30 CFR Part 18), ground check conductors, tight spaces, water exposure, frequent moves |
| Mineral Processing | Crushing, grinding, flotation, leaching, smelting, refining | Tray cable, VFD cable, MV cable, instrumentation cable, high-temp cable, thermocouple wire | High ambient temperatures (smelters/kilns), corrosive chemicals, continuous duty motors, process control integration |
Key Considerations for Mining Cable
MSHA Requirements & Flame Resistance
Electrical cable used in underground coal mines must meet MSHA acceptance requirements under 30 CFR Part 18 (electric motor-driven mine equipment) and the applicable sections of 30 CFR Parts 75 and 77. This includes flame-resistance testing per MSHA standards — cable that does not carry an MSHA acceptance marking cannot be installed underground. Surface mines (metal/nonmetal) operating under 30 CFR Part 56/57 have different but overlapping requirements. Always verify that cable carries the required MSHA acceptance for the specific mine classification before ordering.
Ground Check Conductors
Mining cable designated "G-GC" or "SHD-GC" includes a ground check conductor — a small insulated pilot wire used to continuously monitor the integrity of the grounding circuit. If the ground path is interrupted, the ground check system trips the circuit breaker. This is a critical safety feature required on trailing cables for mobile equipment in many mining applications. Cable without a ground check conductor (plain Type G or SHD) may not meet the mine's electrical protection plan.
Trailing Cable Construction & Abuse Resistance
Trailing cables on draglines, shovels, and continuous miners endure extreme mechanical stress — dragging over rock, repeated flexing on reeling drums, crushing under equipment tracks, and exposure to water, mud, and petroleum products. Mining cable jackets are typically heavy-duty CPE (chlorinated polyethylene) or EPDM rubber rated for severe service. Jacket thickness, conductor flexibility (Class H or K stranding), and overall cable diameter all affect service life. Specifying the right construction for the equipment's duty cycle prevents premature cable failure and unplanned downtime.
Voltage Classes & Equipment Matching
Mining cable voltage ratings must match the equipment and distribution system. Shuttle cars and continuous miners typically operate at 600V–1 kV (Type G-GC). Larger mobile equipment — draglines, electric shovels, highwall miners — may operate at 5 kV, 8 kV, 15 kV, or up to 25 kV (Type SHD-GC with individual conductor shielding). Portable substations step high-voltage mine power down to the equipment operating voltage. Always match the cable voltage rating to the system voltage and verify shielding requirements for medium-voltage trailing cables.
Environmental Conditions
Mining environments expose cable to standing water, mud, abrasive rock surfaces, petroleum-based hydraulic fluids, UV radiation (surface mines), and temperature extremes. Cable jackets must be rated for the specific exposures present. CPE jackets offer excellent oil and flame resistance. EPDM provides superior flexibility in cold temperatures. For mineral processing facilities, cable near smelters, kilns, and dryers may require high-temperature insulation rated to 150°C or higher. Verify jacket and insulation ratings against the actual operating conditions at the installation site.
Reeling & Cable Management
Many surface mining machines (draglines, stackers, reclaimers) use powered cable reels that wind and unwind trailing cable as the machine moves. Cable for reeling applications must have the flexibility and fatigue resistance to withstand thousands of bend cycles at the reel drum diameter. Cable specified for reeling service is typically built with finer strand counts and more flexible jacket compounds than standard mining cable. The reel drum diameter, cable weight, and minimum bend radius all factor into cable selection for reeled installations.
Mining Markets We Serve
Ramcorp supplies wire and cable to mining operations across the United States. Select a location below for regional information, shipping details, and local project support.
- Northern Nevada — gold, silver, copper, and lithium mining in the Great Basin
- Pittsburgh, PA — Appalachian coal mining and longwall operations
- Denver, CO — hard rock mining across the Rocky Mountain West
- Phoenix, AZ — copper mining and mineral processing in Arizona
- Houston, TX — logistics hub for mining cable shipments to Gulf Coast and Latin American operations
- Miami, FL — export gateway for cable shipments to Caribbean and South American mining operations
Related Guides & Resources
- Mining Cable Guide: Type G, G-GC, W & DLO
- Tray Cable Applications & Selection Guide
- MV-105 Medium Voltage Cable Overview (5 kV – 35 kV)
- VFD Cable: Selection & Applications
- Instrumentation Cable Guide
- Portable Cord Types: SOOW, SJOOW, SJT & More
- High Temperature Cable Guide
- Welding Cable: Sizing, Types & Selection Guide
- AWG Wire Gauge Guide: Sizes, Ampacity & Selection
Frequently Asked Questions
What type of cable is used in mining?
Mining operations use Type G and G-GC cable for portable power on mobile equipment up to 2 kV, Type SHD-GC for large mobile equipment operating at 5 kV–25 kV, Type W portable cord for auxiliary power, DLO for flexible high-ampacity connections, medium-voltage cable (MV-105) for permanent power distribution, tray cable for processing plants, and VFD cable for variable-speed conveyor and pump drives. Underground coal mines require cable with MSHA flame-resistance acceptance.
What is the difference between Type G, Type G-GC, and Type SHD-GC mining cable?
Type G is a portable power cable rated up to 2 kV without a ground check conductor. Type G-GC adds a ground check conductor — a small pilot wire that continuously monitors grounding circuit integrity and trips the breaker if the ground path is interrupted. Type SHD-GC is a shielded cable rated 5 kV–25 kV with individual conductor shielding and a ground check conductor, used on large equipment like draglines and electric shovels that operate at medium voltage.
Does mining cable need MSHA acceptance?
Electrical cable used in underground coal mines must carry MSHA acceptance under 30 CFR Part 18. Surface metal/nonmetal mines operating under 30 CFR Part 56/57 have separate requirements. MSHA acceptance confirms the cable meets flame-resistance and construction standards for use in mine environments. Cable without the required MSHA marking cannot be installed in applications where acceptance is mandated. Always verify the specific MSHA requirements for your mine classification before ordering.
What is DLO cable used for in mining?
DLO (Diesel Locomotive Cable) is a flexible single-conductor cable with extra-fine Class K stranding, 2 kV rated, originally designed for locomotive power connections. In mining, DLO is widely used for motor leads, generator connections, battery cables, jumper cables, and any application requiring a highly flexible, high-ampacity single conductor. It is also often used in applications similar to welding cable where higher voltage rating or durability is required.
Does Ramcorp supply cable for mining operations?
Yes. Ramcorp Wire & Cable supplies Type G, G-GC, SHD-GC, and Type W mining cable, DLO, portable cord, tray cable, medium-voltage cable, VFD cable, instrumentation cable, and building wire for surface mining, underground mining, and mineral processing operations. We support large-volume orders and can coordinate across multiple manufacturers to meet project timelines.
Need Cable for a Mining Operation?
Whether you're outfitting a new mine, replacing trailing cable on mobile equipment, or sourcing cable for a processing plant expansion, our team can help with product selection, volume pricing, and delivery coordination. We respond to quote requests within one business day.
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Disclaimer: This guide is provided for informational purposes only and is not installation advice. Installing wire & cable can be dangerous and pose a risk of possible electric shock or other hazards. Specifications, availability, and pricing are subject to change without notice. Always verify product specifications with the manufacturer's current datasheet before ordering. Consult a licensed professional for installation advice.
The information on this page is provided for general reference only and may contain errors or omissions. MSHA requirements referenced on this page are based on 30 CFR and may be subject to updates or revisions — always verify current regulations with MSHA directly. NEC® is a registered trademark of the National Fire Protection Association (NFPA®). All other trademarks, product names, and brand names referenced on this page are the property of their respective owners. Ramcorp Wire & Cable is not affiliated with or endorsed by these organizations unless explicitly stated.