MYJV, MYJV22, MYJV32, MYJV42 & MYJV-GXT (0.6/1–8.7/10 kV) XLPE Armoured & Fibre-Composite Mine Power Cable

Fixed power distribution in Chinese-standard underground coal mines, from shaft-bottom substations to panel transformers, pump chambers and conveyor drive houses, is built on the MYJV family of XLPE-insulated, PVC-sheathed mine power cables. One designation covers six voltage classes, 0.6/1 kV, 1.8/3 kV, 3.6/6 kV, 6/6 kV, 6/10 kV and 8.7/10 kV, and the armour suffix tells the installer where the cable may go: MYJV is unarmoured, MYJV22 has double steel-tape armour, MYJV32 has fine galvanized round steel-wire armour and MYJV42 has thick galvanized round steel-wire armour.

Steel tape armour gives crush protection in horizontal roadways and inclined drifts but carries no tensile load. Fine wire armour is used where the cable must resist pull along inclined shafts, and thick wire armour is the choice for vertical shafts where the armour carries the suspended weight. Cross-sections are quoted from 3×10 mm2 up to 3×400 mm2, but the available core and size combinations and the reference diameters are confirmed for each voltage and armour code at order stage; the dimensions of one suffix are never assumed for another.

For substations that need protection signalling and data on the same route, MYJV-GXT and MYJV22-GXT add telecommunication optical fibres in protective tubes laid in the core interstices, at 3.6/6, 6/10 and 8.7/10 kV from 3×25 to 3×300 mm2. Fibre count and type, for example G.652D single-mode or OM2 / OM3 multimode, are configured to the project telemetry plan.

Explore the mining and tunneling cable range for related configurations.

MYJV, MYJV22 and MYJV-GXT XLPE Mine Power Cable Construction & Armour Options

The representative horizontal sample shows an MYJV22-GXT 8.7/10 kV 3x95 mm2 cable: three compacted copper conductors with triple-extruded XLPE insulation and copper tape screens, optical fibre tubes in the interstices, a PVC inner sheath, double galvanized steel tape armour and a flame-retardant PVC outer sheath.

MYJV Type Designation Breakdown

• M: coal-mine cable (Chinese MT/KA designation system)
• YJ: cross-linked polyethylene (XLPE) insulation
• V: PVC sheath
• 22: double steel tape armour with PVC outer sheath
• 32 / 42: fine (32) or thick (42) round steel wire armour with PVC outer sheath
• -GXT: integrated optical fibre unit for telemetry

MYJV, MYJV22, MYJV32 and MYJV42 Coal-Mine Applications & Route Scope

Select the armour code by route and tensile duty, and the GXT version where fibres must travel with the power circuit.

• Shaft-bottom and panel substations, main pump chambers and conveyor drive houses fed at 0.6/1 kV to 8.7/10 kV (MYJV, MYJV22).
• Horizontal roadways and inclined drifts where cables on brackets need crush protection (MYJV22) or must resist longitudinal pull (MYJV32).
• Vertical shaft feeders where the armour must carry the suspended cable weight (MYJV42), with suspension method and safety factor fixed on the order drawing.
• Digital substations and optical differential protection links that need fibre telemetry alongside 3.6/6 kV to 8.7/10 kV power (MYJV-GXT, MYJV22-GXT).

MYJV Family vs Fixed Mining Power Cable, XAT/EVA FO and Borehole Cable Selection Boundary

Low-smoke halogen-free (WDZ) MYJV versions are a separate enquiry and are not covered by the PVC-sheathed designations on this page.

Related selection resources

• Mining and tunneling cable engineering solutions
• Armoured and static mining cable engineering guide for fixed distribution routes
• Fixed Mining Power Cable — PVC / HEPR, SWA / STA Options
• XAT/EVA FO 35 kV Armoured Mining Cable
• Mine Borehole and Shaft Self-Supporting Armoured Drop Cable

MYJV and MYJV-GXT Frequently Asked Questions

Which MYJV armour code should be used in a vertical shaft?

MYJV42, with thick galvanized round steel-wire armour that carries the suspended cable weight. MYJV and MYJV22 cannot carry vertical self-weight, and MYJV32 is intended for inclined shafts. The suspension method and safety factor are fixed on the order drawing.

Are all 0.6/1 to 8.7/10 kV and 3x10 to 3x400 mm2 combinations available in every armour code?

No. The size range is an enquiry range. Available core and cross-section combinations and reference diameters are confirmed for each voltage class and armour code on the quotation drawing.

What fibres can MYJV-GXT carry?

Telecommunication fibres in protective loose or stainless steel tubes in the core interstices. Fibre count and type, for example G.652D single-mode or OM2 / OM3 multimode, are configured to the project telemetry and protection requirements.

What are the MOQ and lead time?

The minimum order quantity is 50 m and the manufacturing lead time is 7 to 45 working days, depending on construction and quantity.

MYJV Family Armour Matrix, MYJV-GXT Sizes & Technical Specifications

MYJV and MYJV-GXT Key Specifications

• Voltage: 0.6/1 to 8.7/10 kV (GXT 3.6/6 to 8.7/10 kV)
• Insulation: XLPE, 90 °C, flame-retardant PVC sheath
• Armour: None, steel tape (22), fine (32) or thick (42) steel wire
• Fibre option: MYJV-GXT / MYJV22-GXT, 3x25 to 3x300 mm²
• Supply: MOQ 50 m; 7 to 45 working days

MYJV, MYJV22, MYJV32 and MYJV42 Armour and Route Matrix

MYJV-GXT and MYJV22-GXT Fibre-Composite Size Range

Reference outer diameters and masses depend on voltage class, armour code and fibre configuration and are issued on the quotation drawing; one suffix or voltage is never assumed to share the dimensions of another.

Under China National Mine Safety Administration Announcement No. 2 of 2026, MT 818.1 became KA 818.1 and MT/T 818.2 to MT/T 818.14 and MT/T 386 became KA/T 818.2 to KA/T 818.14 and KA/T 386, keeping their years; project-specific certification and test scope is verified per order, and no MA safety-mark coverage is claimed on this page.

ASCII part references for BOM and ERP entry: MYJV-GXT and MYJV22-GXT 3x25, MYJV-GXT and MYJV22-GXT 3x35, MYJV-GXT and MYJV22-GXT 3x50, MYJV-GXT and MYJV22-GXT 3x70, MYJV-GXT and MYJV22-GXT 3x95, MYJV-GXT and MYJV22-GXT 3x120, MYJV-GXT and MYJV22-GXT 3x150, MYJV-GXT and MYJV22-GXT 3x185, MYJV-GXT and MYJV22-GXT 3x240, MYJV-GXT and MYJV22-GXT 3x300; MYJV, MYJV22, MYJV32 and MYJV42 are entered as model, voltage class and 3xS with S confirmed on the quotation drawing.

MYJV Standards & Test References (MT/T 818.11, KA/T 818.11, MT/T 386)

Certifications and document support

TEBAOFLEX company certificates and quality system documentation

National Public Service Platform for Standards Information (SAMR, China) — GB/T and coal-industry standard records