Technical Section

Product Name: «Noan‑G02F» Underground Telephone Cable
Application: Ground telephone lines with two simultaneous pairs, suitable for underground routes, ducts, and indoor environments requiring protection against noise and environmental conditions

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

Electrical and Performance Specifications
• Conductor diameter: Based on reference “2-pair” cables, approximately ~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 pair interference in multi-pair shielded cables
• Minimum bending radius: 10 times the overall cable diameter (or per manufacturer instructions)

Installation and Maintenance Notes
• Install in ducts, underground, or protected routes
• Protect points where obstacles are crossed using clamps or protective sleeves
• Connect shield to ground at a single point for optimal performance
• Follow bending radius requirements and avoid sharp bends
• After installation, test insulation resistance and line performance

Content Section
Noan‑G02F Two-Pair Shielded Underground Telephone Cable

Noavaran Nirooye Paytakht is proud to present the «Noan‑G02F» cable; a two-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‑G02F» is an ideal choice for urban or intercity projects needing multiple telephone lines in an underground route, offering environmental durability, stable signal, and reliable performance.

Key Features:
• Two twisted pairs
• Full-coverage foil shield
• Lightweight CCAM conductor with 60/0 structure
• Durable design for indoor and underground installation
• High insulation resistance testing
• Optimal performance in environmental conditions

Applications, Uses, and Comparative Analysis

Suitable Applications
• Ground telephone lines with a low number of pairs
• Underground or in-building routes in telecommunication projects
• Areas with moderate electromagnetic interference
• Urban or rural areas requiring multiple telephone lines on a single route

Advantages
• Supports multiple simultaneous telephone lines without separate cables
• Effective protection against environmental noise thanks to the foil shield
• Reduced installation cost due to using a single cable for multiple pairs
• Lighter and lower cost compared to full copper cables

Disadvantages
• Higher conductor resistance compared to full copper cables
• Shield performance decreases if grounding is not done correctly
• Precise installation and adherence to standards are important
• Signal attenuation may be noticeable over longer distances

Comparison with Fewer-Pair Models
• Compared to one- or four-pair cables, two pairs have lower core density, potentially reducing crosstalk; precise twisted pair length and continuous foil design are essential
• Production cost is relatively lower, while the benefit of supporting multiple lines in one cable is significant

Quality Assurance and Production Control
• Precise control of strand count (60 strands) and conductor uniformity
• Guarantee of foil thickness, adhesion, and quality
• Insulation, thermal aging, mechanical, and vibration tests on samples
• Printing product name, Noavaran Nirooye Paytakht, technical specifications, and production date on the cable
• Providing insulation resistance and performance test reports to the customer