Mining Telephone Cable – Customized Screened Multi Pairs 50 Pairs 0.64mm² Shielded Multipair Phone Cable PC/PE/IS/OS/PVC 50x2x0.64 Phone Cable Blue 30V -25°C to +70°C

Mining Telephone Cable – Customized Screened Multi Pairs 50 Pairs 0.64mm² Shielded Multipair Phone Cable PC/PE/IS/OS/PVC 50x2x0.64 Phone Cable Blue 30V -25°C to +70°C

This customized screened multipair telephone cable features 50 twisted pairs of 0.64mm² conductors, specifically engineered for large-scale mine communication systems requiring high channel density with reliable voice and data transmission in demanding underground environments.

Each conductor utilizes PC plain annealed copper Class 1 solid wire with 1/0.90 construction, providing excellent conductivity and mechanical strength for long-distance communication across extensive mining operations. PE (polyethylene) insulation delivers stable dielectric properties and superior moisture resistance essential for underground mining applications. Core identification follows telephone standard color coding with 10 distinct pair combinations, repeated across the 50-pair configuration.

Each pair is secured with polyester tape binder, followed by an individual AL-PET (Aluminium/Polyethylene Terephthalate Laminate) foil screen with tinned copper drain wire, providing 100% EMI coverage for each communication channel. PP (polypropylene) filler materials maintain core geometry and prevent moisture ingress. The 50 pairs are twisted and assembled with an overall polyester tape binder, followed by a second AL-PET foil screen with tinned copper drain wire delivering comprehensive shielding against external interference.

The outer sheath is PVC compound rated 90°C with UV resistance in blue, offering durability, flexibility, and high visibility for easy cable identification. Rated 30V with operating temperature range -25°C to +70°C and 4kV spark test verification, this cable is ideal for underground mine telephone networks, emergency communication systems, and large-scale multi-channel voice communication in hazardous mining environments.

Key Features & Technical Advantages

• 50 x 2 x 0.64mm² twisted pairs for high-density multi-channel voice communication

• PC plain annealed copper Class 1 solid 1/0.90 conductors for long-distance reliability

• PE insulation for moisture resistance and stable dielectric properties

• 10-pair telephone standard color coding repeated for 50-pair identification

• Dual-layer shielding: individual AL-PET per pair + overall AL-PET

• Drain wires for continuous grounding

• Polyester tape binding at pair and overall levels

• PP filler for moisture prevention and core stability

• PVC sheath blue, 90°C rated, UV resistant

• 30V rating, -25°C to +70°C temperature range

• 4kV spark test verification

Specifications & Construction

Why Choose This 50-Pair Mining Telephone Cable

This high-density 50-pair shielded telephone cable is specifically designed for large-scale mine communication systems requiring extensive channel capacity. PC plain annealed copper solid conductors ensure long-distance signal integrity across vast mining operations. PE insulation provides excellent moisture resistance critical for underground installations. The dual-layer shielding system—individual AL-PET screens per pair plus overall AL-PET screen—delivers exceptional EMI protection, ensuring clear voice communication across all 50 channels even in electrically noisy mining environments. Telephone standard color coding enables quick, accurate termination. PP filler prevents moisture ingress, while PVC blue sheath offers durability, UV resistance, and high visibility for easy cable identification. With 4kV spark test verification, this cable is engineered for mission-critical mine communication systems requiring high channel density.

Typical Applications – Solving Critical Mining Communication Challenges

• Large-Scale Underground Mine Telephone Networks: Provides high-density voice communication for extensive mining operations with multiple levels and sections

• Central Control Room Connectivity: Delivers multi-channel communication links between surface control centers and underground operations

• Emergency Communication Systems: Enables fail-safe multi-line communication across all mine areas for evacuation and emergency response

• Shaft Communication: Supplies high-capacity cabling for vertical shaft telephone systems with multiple stations on each level

• Mine Refuge Station Network: Provides dedicated communication lines to multiple refuge chambers throughout the mine

• Surface to Underground Infrastructure: Delivers robust multipair cabling for comprehensive communication between surface facilities and underground operations

• Large Tunnel Projects: Supplies high-density shielded telephone cabling for tunnel construction and transportation systems

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FAQ

Q1: Why are 50 pairs specified for mining telephone networks?

A: 50-pair configuration provides high channel density for large-scale mining operations, enabling dedicated communication lines to multiple work areas, refuge stations, and control points.

Q2: What is the advantage of individual pair shielding on all 50 pairs?

A: Individual pair shielding eliminates crosstalk between all 50 channels, ensuring clear, interference-free communication across the entire telephone network simultaneously.

Q3: Why is PE insulation used instead of other materials?

A: PE offers excellent moisture resistance, low dielectric constant, and stable electrical properties, critical for maintaining signal integrity in wet underground mining environments over long distances.

Q4: What does the 30V voltage rating indicate?

A: The 30V rating is standard for telephone and communication circuits, providing adequate margin for voice transmission while ensuring safety in mining environments.

Q5: Why is PVC sheath with UV resistance used for mining cables?

A: PVC provides durability, flexibility, and cost-effectiveness, while UV resistance ensures longevity for cable sections exposed to surface sunlight in open-cut mining and surface facilities.