MCPJB, MCPTJB, MCPTJR and MSCPTJB Reinforced Shearer Cable

High-output longwall shearers, steep-seam combines, shuttle cars and roof-bolter drill rigs put more pulling and twisting load on their trailing cables than a standard shearer cable is designed for. In the Chinese MT coal-mine cable system, the suffix B or R marks a reinforced construction: B for a braided reinforcement layer and R for a wrapped reinforcement layer, applied between the inner and outer sheaths. This page covers four reinforced designations, MCPJB, MCPTJB, MCPTJR and MSCPTJB, from 0.66/1.14 kV to 1.9/3.3 kV.

MCPJB is the standard reinforced shearer cable of MT/T 818.3: semi-conductive rubber screens over the EPR-insulated power cores, control and monitoring cores (for example 3×50+1×25+3×1.5+3×1.5 mm2) and a braided reinforcement layer. MCPTJB and MCPTJR keep the reinforcement but replace the semi-conductive screens with tinned copper and fibre composite metallic screens for lower fault-loop impedance, at 0.66/1.14 kV and 1.9/3.3 kV in sizes from 10 mm2 to 240 mm2. MSCPTJB is an enterprise-standard double-screened variant at 0.66/1.14 kV, with metallic phase screens, a monitoring core and braided reinforcement, used on shuttle cars and roof-bolter drill rigs in layouts such as 3×16+1×10+1×10 mm2.

The standard MCP and MCPTJ shearer cables on our existing page already include an anti-torsion braid that binds the core assembly under a single outer sheath. The B and R designations add a separate reinforcement layer between two sheaths and are chosen where pulling load, steep gradients or long faces exceed that duty. MCPTJB, MCPTJR and MSCPTJB are enterprise designations that apply the MT 818 flame clauses, so their construction is confirmed on the order drawing.

Explore the mining and tunneling cable range for related configurations.

MCPJB, MCPTJB, MCPTJR and MSCPTJB Reinforced Shearer Cable Construction

The representative horizontal sample shows an MCPTJB 1.9/3.3 kV 3x70+1x35+4x4 mm2 reinforced shearer cable: three Class 5 tinned copper power cores with EPR insulation, semi-conductive screens and tinned copper and fibre composite metallic screens, an earth core, a four-core control and monitoring unit, an inner chloroprene-type sheath, a braided reinforcement layer and a flame-retardant outer sheath.

MCPJB, MCPTJB, MCPTJR and MSCPTJB Type Designation Breakdown

• MC: coal-mine mobile flexible cable for coal cutters and longwall shearers (采煤机橡套软电缆)
• P / PT: semi-conductive rubber phase screen (P in MCPJB) or tinned copper/fibre composite metallic screen (PT in MCPTJB / MCPTJR)
• SC (in MSCPTJB): enterprise double-screened metallic construction for 0.66/1.14 kV shuttle cars and roof-bolter drill rigs
• J: integrated monitoring / ground-check core assembly for pilot continuity and interlock circuits
• B: braided high-tenacity reinforcement layer applied between the inner and outer chloroprene-type sheaths
• R: wrapped reinforcement layer between the inner and outer sheaths (MCPTJR), giving a slightly smaller O.D. than B

MCPJB, MCPTJB, MCPTJR and MSCPTJB Longwall Shearer & Shuttle-Car Applications

Select by phase screen type, reinforcement form and the haulage duty of the machine.

• Longwall drum shearers on 0.66/1.14 kV and 1.9/3.3 kV faces where cable handler pull or face length exceeds the duty of standard MCP / MCPTJ cable.
• Steep-seam and inclined-face combines where gravity load on the trailing cable calls for braided (B) or wrapped (R) reinforcement.
• Shuttle cars and roof-bolter drill rigs on 0.66/1.14 kV using the double-screened MSCPTJB construction.
• Replacement of reinforced shearer cable on Chinese coal machinery exported to overseas coal mines, matched to the original designation.

MCPJB, MCPTJB, MCPTJR and MSCPTJB vs Standard MCP and MCPTJ Selection Boundary

Choose MCPJB, MCPTJB, MCPTJR or MSCPTJB where a separate braided (B) or wrapped (R) reinforcement layer between two sheaths is required; choose standard MCP or MCPTJ for baseline shearer duty.

Related selection resources

• Mining and tunneling cable engineering solutions
• Underground vs surface mining cables: longwall, hard-rock heading and open-pit selection guide
• MCP and MCPTJ Coal Cutter and Shearer Screened Flexible Cable
• MYPTJ Monitored Medium-Voltage Mining Trailing Cable
• TYPE275 1.1 kV Flexible Shuttle Car Mining Cable

MCPJB, MCPTJB, MCPTJR and MSCPTJB Frequently Asked Questions

How do MCPJB, MCPTJB, MCPTJR and MSCPTJB differ in screening and reinforcement?

MCPJB (0.66/1.14 kV, MT/T 818.3) uses semi-conductive rubber phase screens and a braided reinforcement layer (B) between the inner and outer sheaths. MCPTJB and MCPTJR (0.66/1.14 kV and 1.9/3.3 kV, 10–240 mm²) use tinned copper and fibre composite metallic phase screens with either a braided (B) or wrapped (R) reinforcement layer. MSCPTJB (0.66/1.14 kV) is an enterprise double-screened metallic construction with a monitoring core and braided reinforcement for shuttle cars and roof-bolter drill rigs.

What is the difference between B (braided) and R (wrapped) reinforcement?

Both B and R place a dedicated high-tenacity reinforcement layer between an extruded inner chloroprene-type sheath and the heavy-duty outer sheath to absorb pulling and torsion load. B uses an open braided layer, while R (as in MCPTJR 3x95+1x50+4x6 and 3x120+1x70+4x6) uses a wrapped reinforcement layer that achieves a slightly smaller overall diameter for the same core layout.

When should I choose these B or R reinforced cables over standard MCP or MCPTJ?

Standard MCP and MCPTJ cables use an anti-torsion braid that binds the core assembly under a single outer sheath. Choose MCPJB, MCPTJB, MCPTJR or MSCPTJB when long faces, steep-seam gradients, heavy cable-handler pull or shuttle-car reeling require a separate reinforcement layer between two sheaths.

What are the minimum order quantity and manufacturing lead time?

The minimum order quantity (MOQ) is 50 m and the manufacturing lead time is 7 to 45 working days, with screen arrangement and reinforcement confirmed on the order drawing.

MCPJB, MCPTJB, MCPTJR and MSCPTJB Dimensions, Current Rating & Technical Specifications

MCPJB, MCPTJB, MCPTJR and MSCPTJB Key Specifications

• Models covered: MCPJB (0.66/1.14 kV), MCPTJB & MCPTJR (0.66/1.14 & 1.9/3.3 kV) and MSCPTJB (0.66/1.14 kV)
• Conductor & insulation: Class 5 tinned copper (10 to 240 mm² power cores) with 90 °C EPR insulation
• Screening options: Semi-conductive rubber (MCPJB), tinned Cu/fibre composite (MCPTJB, MCPTJR) or double metallic screen (MSCPTJB)
• Sheath reinforcement: Separate braided (B) or wrapped (R) reinforcement layer between inner and outer chloroprene-type sheaths
• Design references: MT/T 818.3-2009 (KA/T 818.3-2009) for MCPJB; enterprise specs applying MT 818.1 and MT/T 386 flame clauses

MCPJB and MSCPTJB 0.66/1.14 kV Reinforced Shearer and Shuttle-Car Cable Schedule

MCPTJB and MCPTJR 0.66/1.14 kV and 1.9/3.3 kV Metallic-Screened Reinforced Shearer Cable Schedule

Current ratings are nominal values for a single cable in air at 25 C and 90 C conductor temperature; apply cable handler and layering derating as required by the machine manufacturer.

China MA safety-mark coverage is model- and size-specific; no MA coverage is claimed for these reinforced designations on this page, so state the certificate requirement of the destination mine when requesting a quotation.

ASCII part references for BOM and ERP entry: MCPJB 3x35+1x16+3x1.5+3x1.5, MCPJB 3x50+1x25+3x1.5+3x1.5, MCPJB 3x70+1x25+3x1.5+3x1.5, MCPJB 3x95+1x35+3x1.5+3x1.5, MSCPTJB 3x16+1x10+1x10, MSCPTJB 3x25+1x16+1x10, MSCPTJB 3x35+1x16+1x10, MSCPTJB 3x50+1x16+1x10, MCPTJB 3x35+1x16+4x4, MCPTJB 3x50+1x25+4x4, MCPTJB 3x70+1x35+4x4, MCPTJR 3x95+1x50+4x6, MCPTJB 3x95+1x50+4x6, MCPTJR 3x120+1x70+4x6.

MCPJB, MCPTJB, MCPTJR and MSCPTJB Standards & Test References (MT/T 818.3, 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