Mining Cable / 0.6/1kV
Mining Steel Tape Armored XLPE Cable
Model: MYJV22 / Mining Armored Cable
Mining steel tape armored XLPE cable providing enhanced mechanical protection for underground mining applications.
- Voltage Rating
- 0.6/1kV
- Number of Cores
- Array
- Cross Section
- 4–400 mm²
- Conductor
- Copper
- Armoring
- Steel Tape Armored
- MOQ
- ≥ 100 m
Standards & Certifications
- MT/T
- MT/T 818
Downloads
Specifications
Technical Specifications & Performance
Construction
- Model / Series
- MYJV22 / Mining Armored Cable
- Voltage Rating
- 0.6/1kV
- Conductor Material
- Copper
- Conductor Class
- Class 2 Stranded
- Cross Section
- 4–400 mm²
- Number of Cores
- Array
- Insulation
- XLPE
- Sheath
- PVC
- Armoring
- Steel Tape Armored
- MOQ
- ≥ 100 m
Performance
- Max. Conductor Temp.
- 90°C
- Min. Bending Radius
- 15 × Cable Outer Diameter
About This Product
The Workhorse Cable for Mine Main Roadway and Gallery Distribution
Mining Steel Tape Armored XLPE Cable (model designation MYJV22 with PVC outer sheath, MYJV23 with PE outer sheath for wet roadways) is the fixed-installation power cable that does the bulk of the work underground. Horizontal main haulage, ventilation gallery feeders, substation tie lines, surface-to-portal trench runs — anywhere the cable lies flat or runs at a gentle gradient, MYJV22 is the standard specification. The double steel tape armor handles the crushing loads and lateral impacts that mine roadways subject cables to, at roughly 25 to 40 percent lower cost than the equivalent steel-wire-armored MYJV32.
Production follows MT 818 (the Chinese coal mine cable standard, classification 1-2 for mine-use power cable rated up to 8.7/15 kV) in combination with GB/T 12706 for the underlying XLPE insulation construction. The cable is suitable for fixed wiring inside mines but is not flame-retardant by default — specify MYJV22-ZR if your mine safety regulations require IEC 60332-3 Category A bunched-cable performance, or MYJV22-WDZ with LSZH outer sheath for confined manned spaces.
Jinda manufactures MYJV22 and MYJV23 across multiple production bases, with our Shandong and Liaoning facilities running dedicated steel tape armoring lines using 0.2 mm and 0.5 mm hot-dip galvanized steel strip per GB/T 2518. Standard lead time is 15 to 25 days for voltages up to 8.7/15 kV and cross-sections up to 240 mm²; sample factory test reports from prior shipments are available with every quotation.
Cable Structure
Six Layers, Optimized for Crush Resistance and Cost
The construction is identical to a standard YJV XLPE power cable up to the inner sheath. From there, two counter-laid galvanized steel tapes form the armor — the lighter, cheaper alternative to round-wire armor (MYJV32) for installations that do not need to carry axial tension.
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1
Conductor — Stranded Bare Copper (Class 2)
Compact-stranded bare annealed copper conductor per IEC 60228 Class 2. Aluminum is offered on request for cross-sections of 25 mm² and above, with model designation changing to MLYJV22.
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2
Insulation — Cross-Linked Polyethylene (XLPE)
Dry-cured XLPE insulation, conductor operating temperature 90°C continuous, 250°C short-circuit. For 6/10 kV and above, semi-conducting layers are extruded over the conductor and outside the insulation in a triple-extrusion process.
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3
Filler & Binding Tape
Non-hygroscopic PP filler fills the interstices to produce a circular cross-section. A non-woven binding tape holds the cabled cores in place before the inner sheath is extruded.
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4
Inner Sheath (Bedding) — PVC
Extruded PVC inner sheath cushions the insulation from the steel tape armor edges and prevents the tape from cutting into the cores during pulling or bending.
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5
Armor — Double Galvanized Steel Tape
Two helical layers of hot-dip galvanized steel tape (typically 0.2 mm for LV / small OD, 0.5 mm for MV / large OD per GB/T 12706-3 Table 13) laid in opposite directions with a small gap between turns. The counter-helical lay closes that gap on the second pass, giving 360° mechanical protection against lateral crushing and impact. The tape carries lateral load well but is not designed to carry axial tension — for that use MYJV32.
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6
Outer Sheath — PVC (Black) or PE
Extruded PVC outer sheath, black, with surface print giving model, voltage, cores×cross-section, manufacturer, and length markers. For wet roadways and damp galleries where moisture ingress is a concern, specify the PE outer sheath variant (MYJV23) — PE has lower water absorption than PVC. LSZH outer sheath (MYJV22-WDZ) is available for confined manned spaces.
Key Features
Why Steel Tape Is the Default Choice for Mine Roadway Runs
Steel tape armor is not a compromise — it is the right tool for horizontal and gently inclined installations. The features below are why MYJV22 outsells MYJV32 by roughly four to one across mine electrical procurement, despite the structural similarity.
Strong Lateral Crush Resistance
Counter-laid double steel tape gives 360° coverage against lateral crushing — roof bolt strikes, falling rock, vehicle traffic over surface trenches. For horizontal runs where the threat is from above and the sides, this is the relevant failure mode and steel tape handles it well.
25 to 40 Percent Lower Cost Than MYJV32
Steel tape uses far less raw steel than round wire armor of the same cable OD. For large-volume orders covering kilometers of horizontal main roadway, the cost difference adds up fast — without sacrificing mechanical protection where it matters for this installation type.
XLPE Insulation, 90°C Continuous
XLPE rated 90°C continuous / 250°C short-circuit gives roughly 15 to 20 percent more ampacity than PVC-insulated mine cable (MYV22) at the same cross-section. Less copper for the same load, lower voltage drop on long mine feeders.
Easier to Install Than Round Wire Armor
Smaller OD, lower weight per meter, and friendlier behavior in cable trays and ladders. Cable glands are simpler, terminations faster. For a 1-km horizontal run, installation labor is meaningfully lower than the same job with MYJV32.
Full Voltage Range, 0.6/1 kV to 8.7/15 kV
One product family covers everything from LV distribution circuits at the working face to MV feeders along main galleries. Cores from 1 to 5; cross-sections 1.5 to 400 mm². Mix and match within a single project order without juggling multiple cable types.
Flame-Retardant and PE Sheath Variants Available
MYJV22-ZR adds flame-retardant compounding to pass GB/T 19666 / IEC 60332-3 Category A. MYJV23 substitutes PE for the PVC outer sheath, lowering water absorption for damp galleries. Both are quoted alongside the standard product without changing the lead time.
How to Choose
Six Decisions Before You Place the Order
Mining cable selection is not just about ampacity. Choosing the wrong armor or the wrong sheath compound will lead to either premature failure or unnecessary expense. Walk through these six decisions with your designer before issuing the PO.
Confirm the voltage class
Match the system voltage U₀ / U to one of the standard grades: 0.6/1 kV for LV distribution, 3.6/6 kV or 6/10 kV for mine MV feeders, 8.7/15 kV for deep mine main supply. For unearthed or impedance-earthed mine networks (common in MV), specify the higher grade to allow for sustained earth-fault voltage rise.
Confirm tape armor is the right choice
Horizontal main roadway, gentle gradient (under 30°), or surface-to-portal trench → MYJV22 is correct and saves significant cost. Vertical shaft drop or any run where the cable will hang under its own weight → specify MYJV32 (round wire) instead. Steel tape will fail under sustained axial tension.
Size the cross-section
Pick the cross-section that satisfies both ampacity (under your installation method) and voltage drop (typically ≤ 5 percent end-to-end for mine loads). For long horizontal runs along main galleries, voltage drop usually decides. Always cross-check against the short-circuit thermal stress: at 8.7/15 kV with a 25 kA fault, conductors below 70 mm² will be undersized.
Choose the number of cores
3-core for three-phase loads with grounding via the armor (most common). 3+1 (3-core + reduced neutral) or 3+2 (3-core + neutral + earth) for systems requiring a dedicated PE conductor — mandatory in some jurisdictions for mine MV. 4-core and 5-core combinations are available for LV power and lighting circuits.
PVC or PE outer sheath?
PVC (MYJV22) is the default — mechanically robust, abrasion-resistant, fine for normal underground conditions. PE (MYJV23) has lower water absorption and better resistance to chemical and microbial attack — specify it for damp galleries, near-water-table installations, or trenched outdoor runs. PE is slightly less flame-resistant, so do not use it where ZR (flame-retardant) is required.
Specify flame-retardant or LSZH if needed
Standard MYJV22 is not flame-retardant by default. If your mine safety regulations require IEC 60332-3 Category A bunched-cable performance, specify MYJV22-ZR. If smoke density and corrosive gas emissions are regulated — typical for cable galleries that double as personnel escapeways — specify MYJV22-WDZ with LSZH outer sheath.
Applications
Where MYJV22 Does the Heavy Lifting
MYJV22 covers the routine bulk of mine power distribution — the long, flat, mostly-horizontal runs that account for most of the cable a mine consumes. The four scenarios below are the dominant ones; for vertical drops and high-tension applications, switch to MYJV32 instead.
Main Haulage Roadways
Horizontal main galleries delivering 6/10 kV or 8.7/15 kV power from the shaft bottom to the underground substations and panel feeders. Routine cable trays, cable ladders, and direct fixings to the roadway wall.
Gentle Inclined Drifts & Cross-Cuts
Inclined drifts at gradients up to about 30°, where the cable rests against the wall with proper saddles and the longitudinal self-weight component remains manageable. Cross-cut connecting drifts between parallel galleries.
Surface-to-Portal Trenched Runs
Buried feeders from the surface substation to the mine portal, plus surface tie lines between mine buildings, fan houses, and conveyor drive stations. Direct burial in cable trenches with bedding sand — the steel tape protects against light digging contact.
Metal Mines, Quarries, Tunnels
Iron, copper, gold, lead-zinc, bauxite mining, plus large tunneling projects. Same mechanical demands as coal mines minus the methane gas constraint — standard MYJV22 (non-flame-retardant) is widely deployed here, with MYJV23 (PE sheath) preferred for tunnel boring projects with groundwater intrusion.
Not suitable for: Vertical shafts and steep inclined runs over 30° (use MYJV32 with round wire armor — steel tape cannot carry the cable’s suspended self-weight). Also not suitable for mobile machinery — use MCP or MYP rubber-sheathed trailing cable for face conveyors, shearers, and loaders, which need flexibility MYJV22 cannot provide.
Technical Data
DC Resistance & Ampacity (3-Core 0.6/1 kV, Copper)
Reference values for the most-quoted variant: 3-core copper, 0.6/1 kV class, XLPE insulation, steel tape armor with PVC outer sheath. Ampacity is for laid-in-air installation at 30°C ambient, per IEC 60364-5-52. Values for 6/10 kV and above, or installation in conduit / direct burial, are provided with the formal technical quotation.
| Cross Section | DC Resistance (max) | Ampacity (in air, 30°C) | Ampacity (buried, 20°C ground) | Approx. Weight |
|---|---|---|---|---|
| 10 mm² | 1.83 Ω/km | 67 A | 78 A | ~ 650 kg/km |
| 16 mm² | 1.15 Ω/km | 89 A | 102 A | ~ 820 kg/km |
| 25 mm² | 0.727 Ω/km | 118 A | 133 A | ~ 1,090 kg/km |
| 35 mm² | 0.524 Ω/km | 145 A | 162 A | ~ 1,330 kg/km |
| 50 mm² | 0.387 Ω/km | 175 A | 195 A | ~ 1,650 kg/km |
| 70 mm² | 0.268 Ω/km | 220 A | 240 A | ~ 2,180 kg/km |
| 95 mm² | 0.193 Ω/km | 265 A | 288 A | ~ 2,750 kg/km |
| 120 mm² | 0.153 Ω/km | 305 A | 328 A | ~ 3,320 kg/km |
| 150 mm² | 0.124 Ω/km | 350 A | 372 A | ~ 4,000 kg/km |
| 185 mm² | 0.0991 Ω/km | 400 A | 420 A | ~ 4,800 kg/km |
| 240 mm² | 0.0754 Ω/km | 465 A | 485 A | ~ 6,100 kg/km |
| 300 mm² | 0.0601 Ω/km | 530 A | 545 A | ~ 7,500 kg/km |
DC resistance values per IEC 60228 Class 2 stranded copper, 20°C. Ampacity reference per IEC 60364-5-52 Table B.52.4 / Method E (in air, multi-core cable, 30°C ambient) and Method D1 (buried, 20°C ground, thermal resistivity 1.0 K·m/W). Weights include steel tape armor and PVC outer sheath for 3-core variant — approximately 12 to 15 percent lighter than the equivalent MYJV32 (round wire armor) at each cross-section. For aluminum conductors, multiply DC resistance by 1.64 and ampacity by approximately 0.78. Always verify against factory test report before final specification.
Comparison
MYJV22 vs MYJV23 vs MYJV32 — Pick the Right Armor and Sheath
All three are mining XLPE power cables. The differences are the armor type (which determines what mechanical loads the cable can take) and the outer sheath material (which determines water resistance). Use this table to confirm you have specified the right combination.
| Attribute | MYJV22 (this product) | MYJV23 (PE sheath) | MYJV32 (round wire) |
|---|---|---|---|
| Armor construction | Double steel tape | Double steel tape | Single layer galvanized round wire |
| Outer sheath | PVC | PE (Polyethylene) | PVC |
| Axial tensile strength | Low — tape resists little pull | Low — tape resists little pull | High — designed for shaft drops |
| Lateral crush resistance | High | High | Very high |
| Water absorption | Moderate (PVC) | Low (PE) | Moderate (PVC) |
| Typical installation | Horizontal roadways, mild inclines | Damp galleries, trenched outdoor | Vertical shafts, steep drifts > 30° |
| Cable OD (relative) | 1.00 (baseline) | 1.00 to 1.02 | Approx. 1.08 to 1.12 |
| Cost (relative) | 1.00 (baseline) | 1.05 to 1.10 | Approx. 1.25 to 1.40 |
| Suitable for shaft drop | No (use MYJV32) | No (use MYJV32) | Up to 300 m |
When to choose MYJV22 (this product)
The default for horizontal main haulage galleries, gentle inclined drifts up to 30°, surface-to-portal trench feeders, and substation tie lines. Best cost-to-protection ratio for the routine bulk of mine power distribution. Pays for itself on every kilometer compared to over-specifying MYJV32 for runs that do not need axial tension capacity.
When to choose an alternative
For damp galleries, near-water-table installations, or trenched outdoor runs — switch to MYJV23 with PE outer sheath for lower water absorption. For vertical shaft drops or steep inclined runs over 30° — switch to MYJV32 with round wire armor. For mobile machinery (face conveyors, drum shearers, loaders) — use a rubber-sheathed trailing cable (MCP, MYP) instead.
Frequently Asked Questions
Common Questions From Mine Electrical Buyers
Is MYJV22 explosion-proof for gassy coal mines?
The cable itself is not flameproof certified — flameproof certification belongs to the connected equipment (junction boxes, switchgear), not the cable. What the cable contributes to mine safety is flame-retardance: standard MYJV22 is not flame-retardant; specify MYJV22-ZR if your mine safety inspector requires GB/T 19666 / IEC 60332-3 Category A performance. Used together with flameproof Ex d switchgear, MYJV22-ZR is suitable for Chinese coal mine Category I (gassy) installations.
What is the maximum incline I can install MYJV22 on?
The practical limit is around 30° gradient, provided the cable is supported on saddles or hangers every 1.5 to 2 m so it bears against the wall rather than hanging free. Above 30°, the axial weight component grows non-linearly and the steel tape armor begins to slip relative to the inner sheath under sustained load — switch to MYJV32 with round wire armor. Vertical shafts are absolutely not appropriate for tape armor regardless of length.
What is the minimum bending radius for installation?
For armored MV cable (above 1 kV): 15 × OD during installation, 12 × OD permanently installed. For LV armored multi-core (0.6/1 kV): 12 × OD during installation, 10 × OD installed. These are the GB/T 12706 / IEC 60502 values for cables with steel tape armor. Pulling tighter than the install-time radius risks creasing the tape and causing it to cut into the inner sheath — damage you will not see until the cable fails at the first dielectric test.
Can the steel tape armor serve as the protective earth (PE)?
Yes for LV (0.6/1 kV) circuits, provided the calculated earth-fault loop impedance and short-circuit thermal capacity of the steel tape are sufficient for the protection device tripping time. Note that steel tape has less cross-sectional area than round wire armor of equivalent OD, so the thermal margin is tighter — double-check the calculation if the prospective short-circuit current exceeds 25 kA. For MV mine networks (3.6/6 kV and above) most jurisdictions require a dedicated PE conductor — specify a 3+1 or 3+2 core configuration instead of relying on the armor.
When should I specify MYJV23 (PE sheath) over MYJV22 (PVC sheath)?
Three scenarios justify the PE upgrade: damp or wet galleries with active groundwater seepage, near-water-table installations where the cable will be intermittently submerged, and trenched outdoor runs where soil moisture is high. PE has roughly one-tenth the water vapor permeability of PVC, which keeps the steel tape and conductors dry over the cable’s service life. The catch: PE burns more easily than PVC, so do not combine MYJV23 with the ZR (flame-retardant) requirement — pick PVC and add flame-retardant compounding instead.
What is the typical lead time and MOQ?
Standard 0.6/1 kV configurations in copper, up to 240 mm², typically ship in 15–25 days from order — faster than MYJV32 because the steel tape line runs faster than the wire armor line. MV grades (6/10 kV, 8.7/15 kV) and large cross-sections (300 / 400 mm²) need 25–40 days because of triple-extrusion line scheduling. MOQ is normally one drum (1,000 m for standard sizes; less for very large cross-sections); shorter runs are quoted for full project orders. Custom drum lengths add 3–5 days but save on field jointing — usually worth it.
Installation & Handling Tips
Six Field Practices That Avoid Premature Failure
The cable is engineered for the underground environment, but the installation crew can still defeat it. The six items below are the most common installation mistakes seen across the mining customer base — each one is preventable with the right procedure.
Use cable saddles or tray supports every 1.5 to 2 m
Steel tape armor is not made to span long unsupported gaps. On wall-mounted runs, install saddles every 1.5 to 2 m; on tray runs, use the tray rungs as supports. Inadequate support causes the cable to sag, which over time pulls on the terminations and damages the inner sheath where it bends over the support.
Respect minimum bending radius during pulling
Use rollers and pulling sheaves sized to at least the installation bending radius (15 × OD for MV armored). A single sharp bend during cable pull, even briefly, can crease the steel tape and cause it to cut into the inner sheath when the cable is energized.
Seal cable ends immediately
XLPE absorbs moisture if left exposed at cut ends. Reseal with heat-shrink caps within minutes of cutting, and check that the factory end-cap is intact on arrival. Wet insulation will pass first commissioning but degrade fast in service — a hidden but expensive failure mode. Especially critical when storing MYJV22 outdoors before installation.
Earth the steel tape armor at both ends
For LV and most MV mine cable runs, bond the steel tape armor to PE at both terminations. Steel tape is a sufficient earth path for typical horizontal runs; circulating-current losses are negligible at the lengths and currents involved. Get the bonding scheme into the electrical drawing before installation rather than improvising in the field.
Use proper armored cable glands sized for the tape
For 6/10 kV and above, use cold-shrink or heat-shrink termination kits matched to the cable voltage class. The gland must clamp the steel tape ends to maintain electrical continuity to earth and to seal the cable against moisture ingress at the termination point — the most common failure location in mine MV systems.
Run a full commissioning test before energization
For MV cable, run insulation resistance (5 kV megger, 1 minute) and AC voltage withstand test per IEC 60502-2 commissioning values. Routine factory test passing is not a substitute for commissioning — mechanical damage during pull or termination only shows up under voltage stress, and you want to catch it before the cable is buried under 1 km of conveyor.
Safety note: Underground cable installation in coal mines must be carried out by certified electrical workers under a permit-to-work that accounts for methane gas levels, dust ignition risk, and confined-space hazards. The cable’s mechanical and electrical performance assumes installation per MT/T 1117 (Chinese mine cable installation specification) or your jurisdiction’s equivalent.
Manufacturing Capability
Why Source From Jinda Cable
Behind every drum we ship sits a 38-year track record, five production bases under one MES system, and a documentation discipline that gets cables through customs without delays.
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Every cable tested twice before shipping
Since 1987, our two-stage QC has been refined to a science: routine test on the production line, then full electrical and mechanical re-test before packing. Across 50+ export markets, our return rate stays under 0.3%.
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Five production bases, 470,000 m², synced via MES
Tianjin, Liaoning, Heilongjiang, Shandong, and Xian — each base runs under one unified MES system. Same recipe, same protocols, same traceability, regardless of which plant ships your order.
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3,000+ SKUs, custom configurations welcome
Standard sizes ship from inventory. Special voltage grades, color-coding, drum lengths, or armor configurations are routine — submit your spec and our team will quote the lead time honestly.
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Trusted by EPC contractors in 50+ countries
We supply utilities, mining operators, port authorities, and large industrial OEMs across Europe, the Americas, Southeast Asia, the Middle East, and Africa.
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Full paperwork shipped with every order
Every shipment includes factory test report, certificate of origin (COO), packing list, and bill of lading (B/L). Customer-nominated witness testing can be arranged before shipment.
Our Track Record
98.7%
On-time shipment rate (last 24 months)
< 0.3%
Return rate across export markets
25 days
Typical sea freight Tianjin → Rotterdam
100%
Shipments with routine test report attached
Logistics & Delivery
Packaging, Shipping & Documentation
What we handle on our side from production floor to the port of loading. Product-specific installation guidance is supplied with the datasheet that accompanies each order.
Packaging
- Wooden or steel drums per IEC 62004
- Coil packaging available for small cross-sections
- Standard drum lengths plus custom lengths on request
- Each drum labeled with type, voltage, cross-section, length, batch
- Waterproof wrapping for export shipments
- Cable ends sealed against moisture ingress
- Private-label / OEM packaging available under NDA
Shipping
- FCL / LCL sea freight, air freight on request
- Trade terms: EXW, FOB, CFR, CIF, DDP
- Ports of loading: Tianjin / Qingdao / Shanghai
- Typical sea freight to Rotterdam: 25 days
- Lead time confirmed at order acknowledgement
- Container loading photos sent before sailing
Documentation
- Factory routine test report (per applicable standard)
- Commercial invoice and packing list
- Certificate of origin (CO) — China Council, FORM A, FORM E available
- Bill of lading (B/L) — original or telex release
- Third-party inspection by SGS / BV / TÜV on request
- Customer-nominated witness testing arranged before shipment
Get in Touch
Request a Quote for
Mining Steel Tape Armored XLPE Cable
What You'll Receive
- Technical quotation with itemized FOB / CIF pricing
- Sample factory test report from a previous shipment
- Realistic lead time including raw-material procurement
- Direct contact with the assigned sales engineer
Email
info@jindacablegroup.comResponse Time
Within 1 business day
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