Fixed mine distribution routes
This guide covers armoured cable for fixed mine power, control and communication routes. Armour may be interlocked aluminium, steel wire or another specified construction. Select the armour, electrical rating and grounding arrangement for the exact cable and route; handling flexibility alone does not establish suitability for continuous trailing or reeling.
Armoured and static mining cable at a glance
- Static mining cable
- A cable that stays in a fixed position for its service life. It is clipped, cleated, suspended or buried, and is not dragged, reeled or flexed by moving equipment.
- Armoured mining cable
- A mining cable carrying a metallic armour layer for mechanical protection, most often over a fixed or semi-fixed route. Armour is a mechanical element and is not a substitute for the screen or the earth conductor.
- Pliable armour
- Steel wires or strands arranged to retain handling flexibility in specified mining constructions. It is one armour option; other mining cables use interlocked aluminium or different wire-armour designs.
- Pilot core
- An additional insulated conductor used by the specified monitoring circuit to check earth continuity. It does not replace the protective-earth conductor or screen.
- Voltage and circuit duty
- Confirm the rating for the exact family: 600 V control and 1 kV power TECK90, medium-voltage feeders, and communication cables are separate selection routes.
- Movement boundary
- A fixed-installation armoured cable is not automatically suitable for trailing or reeling. Any moving route needs a construction and operating limits specified for that duty.
What “static” actually means in a mine
Static in a mining cable schedule is a duty class, not a description of stiffness. A static cable occupies one position for its service life: fixed to a roadway rib, cleated along a shaft, laid in a trench, or run to a transportable substation that is repositioned only a few times a year.
The distinction matters because it changes the whole specification. A static route removes the flexing life requirement that dominates trailing and reeling design, and replaces it with different priorities: mechanical protection from roof fall and vehicle impact, resistance to crush over long unsupported spans, and an earth path that survives the life of the installation.
The naming trap. In longwall practice the phrase static cable also describes the fixed control and monitoring cables that lie on the goaf side of the face, linking control units at stations along the face. Both meanings are in daily use. Confirm which one a specification means before quoting, because one is a power construction and the other is a control construction.
For fixed mine telephone and signalling circuits, review the MGM 110 110 V armoured telephone and signal cable with separate core-count and telephone-pair tables.
For PE-insulated coal-mine communication circuits, compare the MHY communication family and its MHYBV and MHYA32 armoured variants. MHYBV uses galvanised steel-wire braid armour; MHYA32 uses steel-wire armour with an aluminium–polyethylene bonded layer. The family also includes unarmoured variants, so select the full designation.
Where pliable armour fits among mining constructions
Pliable wire armour is useful where a specified mining cable needs handling flexibility during installation or occasional relocation. Conventional steel wire armour is another fixed-installation option; compare the actual wire design, cable diameter and permitted bending radius.
Some mining constructions use pliable wire armour. For a different fixed-installation design, the TECK90 600 V control and 1 kV power cable uses XLPE insulation, PVC inner and outer jackets, and aluminium interlocking armour. Its control, multicore power and single-conductor power schedules are separate configurations.
| Property | Pliable wire-armoured example | Fixed SWA example |
|---|---|---|
| Armour form | Fine galvanised steel wires or stranded groups | Heavier single galvanised wires |
| Handling | Can be coiled, pulled and repositioned | Installed once, effectively fixed |
| Bending radius | Use the specified handling and installed limits | Use the specified installed and pulling limits |
| Typical insulation | EPR or equivalent elastomer | XLPE |
| Typical sheath | PCP or heavy-duty elastomer | PVC or LSZH |
| Earth arrangement | Specified earth conductor or screen; monitoring core where required | Protective conductor and armour bonding as required by the circuit design |
Keep protective earthing and continuity monitoring separate. The circuit design determines the protective-earth conductor or screen and the required armour bonding. A pilot or ground-check conductor serves the monitoring circuit; it is not the protective-earth path. Do not assume armour alone satisfies the earthing requirement.
Where fixed armoured mining cable actually runs
| Route | What dominates the choice | Typical arrangement |
|---|---|---|
| Surface to portal reticulation | Direct burial, vehicle crossings, excavation risk | Armoured MV feeder, 3.3 to 11 kV |
| Shaft riser | Self-weight over vertical span, cleating intervals, water | Armoured MV with tensile capability, cleated at intervals |
| Roadway distribution | Roof fall, vehicle impact, rib rub | Armoured or heavily sheathed MV, clipped high on the rib |
| Transportable substation feeder | Repositioned a few times a year, not continuously moved | Pliable armoured feeder, coiled for each move |
| Fixed plant and conveyor drives | Long unsupported spans, fixed terminations | Armoured LV or MV, sized for voltage drop over distance |
| Face control and monitoring | Signal integrity, segregation from power | Screened control construction, not a power cable |
Voltage drop deserves separate attention on fixed routes. Trailing cables are usually short and the limit is mechanical. Fixed reticulation can run for hundreds of metres, and conductor size is often set by voltage drop and fault duty rather than by current alone.
Pilot cores and earth continuity on fixed routes
An armoured power feeder needs a correctly designed protective-earth path. Where the protection scheme monitors continuity, the cable may also include one of the following monitoring arrangements; these conductors do not replace protective earthing.
- Pilot core. An insulated conductor, often laid interstitially or on a central cradle, used to prove earth continuity and trip the supply if it is lost. Common in Australian constructions such as Type 260.
- Ground-check conductor. A separate conductor monitored by a ground-check relay, used in North American practice and required on many underground high-voltage circuits.
Monitoring requirements depend on the electrical system, cable construction and applicable mine rules. Do not infer that every fixed armoured power, control or communication cable includes a pilot or ground-check core.
Pilot layouts also differ between cable types: the Type 240 3+3 core mine power cable, for example, lays three interstitial pilot cores among its three screened phase cores, so the pilot function has to be confirmed at both ends.
Which standard governs a fixed armoured mining cable
Fixed mining constructions are specified under regional standards rather than one international document. State the standard in the enquiry; it changes the construction, not just the paperwork.
| Region | Standard reference | Where it applies |
|---|---|---|
| Australia and New Zealand | AS/NZS 1802 | Underground coal trailing and reeling constructions, and the armoured feeder families derived from them |
| Australia and New Zealand | AS/NZS 2802 | Reeling and adjacent mining constructions outside coal |
| North America | ICEA S-75-381 with MSHA acceptance | Mine power feeder and portable power constructions, including ground-check arrangements |
| Germany and EU | DIN VDE 0250 series | Tunnel and mine power constructions in the European designation system |
| South Africa | SANS 1520 series | South African mining constructions |
Standards names are selection references, not an approval claim. Confirm the edition, the acceptance route and the required test documents for the jurisdiction before the order is released.
When the route is not static after all
Specifying a fixed-installation armoured construction for a cable that will actually be dragged creates a duty mismatch. Armour wires fatigue and break under repeated flexing, and the broken ends can migrate through the bedding. If any part of the route moves with equipment, use a mobile construction instead.
A mobile construction also needs a larger bending radius than the same cable fixed in place, and a larger one again over guide pulleys. The values for fixed, flexing, drum and pulley duty are compared in minimum bending radius by cable duty, together with the NEC rules for portable cables.
- Reeling cable versus trailing cable — decide the movement duty before the construction.
- Abrasion-resistant cable for mobile equipment — jacket compounds, wear mechanisms and how to read a worn sheath.
- Mining cable selection guide — the eight-step method for mobile equipment circuits.
- Medium-voltage mining cable selection — screens, grounding and reel data for MV mobile routes.
- SHD-GC, Type G-GC and Type W compared — the North American portable families.
- Type 209 selection notes — the Australian portable family by voltage.
Information required for a fixed armoured cable enquiry
| Data group | Minimum information | Why it matters |
|---|---|---|
| Duty | Confirm the route is fixed, and state how often a transportable substation is repositioned | Decides whether an armoured construction is appropriate at all |
| Electrical | System voltage, load, earthing system, fault level and clearing time | Sets voltage class, screen and earth arrangement |
| Route | Length, buried or cleated, vertical span, crossings and ambient conditions | Sets armour, sheath and tensile requirements |
| Earth path | Protective-earth conductor or screen, armour bonding, and any required pilot or ground-check circuit | Separates fault-current paths from continuity monitoring |
| Compliance | Governing standard, edition and required test or acceptance documents | Changes the construction, not only the paperwork |
| Delivery | Drum lengths, jointing positions, marking and packaging | Fixed routes are cut to length; joints must be planned before manufacture |
Questions buyers ask
What is an armoured mining cable?
An armoured mining cable carries metallic armour for mechanical protection. Power, control and communication designs use different armour, insulation and conductor arrangements. This guide focuses on fixed routes; the exact construction determines its mechanical limits and installation requirements.
What is a static mining cable?
A static mining cable occupies one position for its service life rather than being dragged or reeled by moving equipment. Typical static routes include surface reticulation, shaft risers, roadway distribution and feeders to transportable substations that are repositioned only occasionally.
Can an armoured cable be used as a trailing cable?
A fixed-installation armoured cable should not be selected for trailing merely because its jacket is rugged. Repeated movement requires a purpose-built cable with stated flexing, tension and bending limits. Check the exact construction and equipment duty before substitution.
Is the armour the earth conductor in a mining cable?
Do not assume armour alone is the protective-earth conductor. Confirm the specified earth conductor or screen and armour bonding with the circuit design. A pilot or ground-check conductor is part of a monitoring circuit and is not a substitute for the protective-earth path.
What is the difference between a pilot core and a ground-check conductor?
Both can form part of a circuit that monitors earth continuity. Pilot terminology is common in Australian mining constructions, while ground-check is used in North American designs. Confirm the conductor layout, relay interface and protection requirements; neither conductor replaces protective earthing.
What voltage range do armoured mining cables cover?
There is no single voltage range for all armoured mining cables. The linked TECK90 family separates 600 V control from 1 kV power; the feeder examples include medium-voltage designs and a 35 kV power-and-fibre construction. Communication cables must be selected by their own circuit and test requirements.
Fixed and armoured mining cable routes
- Type 260 armoured screened mining power cable — pliable armoured construction to AS/NZS 1802, 1.1 to 11 kV, for coal-mine supply and mine distribution.
- Type 412 armoured mining power cable — 1.1 kV armoured construction to AS/NZS 2802 for heavy-duty equipment supply.
- Type MP-GC 15 kV mine power feeder cable — three-conductor ground-check feeder for fixed high-voltage distribution in mines, tunnels and shafts.
- 2XSEYQY 6/10 kV MV tunnel power cable — the European designation route for tunnel and mine power.
- Mining, drilling and tunnelling cables — the full range with a selection table by movement duty.
- Underground vs surface mining cables — how longwall coal, hard-rock heading and open-pit surface environments divide screening, pilot and drum rules.
For a fixed 35 kV feeder combining power and optical communication, compare the XAT/EVA FO 35 kV armoured cable with 12 single-mode fibres and separate FA and AA+FA armour configurations.
For North American shaft drops and borehole feeders, compare the CSA TECK90 and HVTECK vertical mine shaft cable (600 V to 15 kV with interlocking metal armour) with the polymeric-armored Type MV-105 and MP-GC feeder cable (5 kV to 35 kV with a bonded polymeric barrier layer for wet trays, ducts and direct burial).
Source and review status
Construction descriptions reflect published manufacturer and distributor data for cables built to the standards named above. Standard references are given as selection references and should be confirmed against the current edition for the governing jurisdiction. Reviewed 3 September 2026.
Where vertical mine shafts, directional borehole drops, and main haulage slopes require ICEA S-75-381 / NEMA WC 58 medium-voltage feeders with galvanized steel-wire borehole armour or interlocking metal armour from 5 kV to 35 kV, specify: Type MPF and MPF-GC 5kV to 35kV Armoured Mine Shaft Feeder Cable.
For Chinese MT/KA coal mine projects requiring fixed XLPE feeder cables in unarmoured (MYJV), steel-tape armoured (MYJV22), steel-wire armoured (MYJV32, MYJV42) or optical-fiber composite (MYJV-GXT, MYJV22-GXT) constructions up to 8.7/10 kV, see: MYJV, MYJV22, MYJV32, MYJV42 & MYJV-GXT (0.6/1–8.7/10 kV) XLPE Armoured & Fibre-Composite Mine Power Cable.
Send the route, not just the cable type
State whether the route is fixed, the system voltage, the earth arrangement and the drum lengths you need. TEBAOFLEX can use them as the starting point for a project-specific mine cable review.