Technical Section

Product Name: “Noan‑G04F” Underground Telephone Cable
Application: Underground telephone lines with four simultaneous pairs, suitable for underground routes, ducts, and indoor environments requiring protection against noise and environmental conditions.

Internal Structure

Conductor: CCAM (Copper‑Clad Aluminum), 60/0 structure (60 fine strands)
Effective conductor area: Designed according to project requirements (e.g., ~0.13 mm² or ~0.17 mm²)
Pair structure: Four twisted pairs
Shield: Laminated aluminum foil wrapped longitudinally around the core (100% coverage)
Drain wire: Auxiliary conductor (copper or tinned copper) for grounding the shield
Conductor insulation: PVC or PE suitable for underground applications
Outer jacket: UV-resistant PVC or composite suitable for outdoor installation

Electrical and Performance Specifications

Conductor diameter: Based on reference 4-pair cables, ~0.60 mm per conductor
Conductor resistance at 20 °C (max): ≤ 186 Ω/km for ~0.60 mm conductor
Insulation resistance (min): ≥ 5000 MΩ·km
Test voltage: AC 1500 V (1 min) / DC 2250 V (1 min) without breakdown
Operating temperature: ‑20 °C to +60 °C
Capacitance and impedance: Twisted pair design reduces crosstalk and inter-pair interference
Minimum bending radius: 10× overall cable diameter (or as per manufacturer guidelines)

Installation and Maintenance Notes

Install in ducts, underground, or protected pathways
Protect crossings with clamps or protective sleeves
Connect shield to ground at a single point for optimal performance
Avoid sharp bends and maintain proper bending radius
Test insulation resistance and line performance after installation

Content Section
Noan‑G04F Four-Pair Shielded Underground Telephone Cable

Noan Capital Innovators is proud to present the “Noan‑G04F” cable; a four-pair shielded underground telephone cable designed for indoor and underground environments requiring simultaneous transmission of multiple telephone lines. The lightweight CCAM conductor with 60/0 strand structure, combined with proper insulation and aluminum shielding, ensures high performance against environmental interference. The “Noan‑G04F” is ideal for urban or intercity projects requiring multiple telephone lines in an underground route, offering environmental durability, stable signal, and reliable performance.

Key Features:

Four twisted pairs
Full foil shield around the core
Lightweight CCAM conductor, 60/0 structure
Durable design for indoor and underground installation
High insulation resistance testing
Optimal performance in various environmental conditions

Description, Applications, and Comparative Analysis

Suitable Applications:

Medium-pair underground telephone lines
Underground or in-structure routes in telecom projects
Areas with moderate electromagnetic interference
Urban or rural areas needing multiple lines in one path

Advantages:

Supports multiple telephone lines simultaneously without separate cables
Effective noise protection due to foil shielding
Reduced installation costs using a single cable for multiple pairs
Lighter weight and lower cost compared to full copper cables

Disadvantages:

Higher conductor resistance compared to full copper cables
Shield effectiveness decreases if not properly grounded
Precise adherence to installation standards required
Signal loss may be noticeable over long distances

Comparison with Fewer-Pair Models:

Compared to one- or two-pair cables, four pairs have higher core density, which may increase inter-pair crosstalk; proper pair twist length and continuous foil design are essential
Production cost is slightly higher, but the advantage of multiple lines in a single cable is significant

Quality Assurance and Production Control:

Precise control of strand count (60 strands) and conductor uniformity
Ensured foil thickness, adhesion, and quality
Insulation testing, thermal aging, mechanical and vibration testing on samples
Printing product name, Noan Capital Innovators, technical specifications, and production date on the cable
Providing customers with insulation resistance and performance test reports