Fifteen-pair shielded underground (60/0 CCAM)

1. Technical Section

Product Name: “Noan‑G15F” Underground Telephone Cable
Application: Underground telephone lines with fifteen simultaneous pairs, suitable for underground paths, ducts, and indoor environments requiring protection against noise and environmental conditions.

Internal Structure

• Conductor: CCAM (Copper‑Clad Aluminum) with 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: Fifteen 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

• Insulation: PVC or PE suitable for underground use

• Outer Jacket: UV-resistant PVC or a composite for outdoor installation

Electrical and Performance Specifications

• Conductor Diameter: Based on reference samples of “15 pairs,” ~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 & Impedance: Twisted pair design reduces crosstalk and pair-to-pair interference

• Minimum Bending Radius: 10× overall cable diameter (or as per manufacturer instructions)

Installation and Maintenance Notes

• Install in ducts, underground, or protected paths

• Protect cable at obstacle crossings with clamps or protective sleeves

• Connect shield to ground at a single point for optimal performance

• Maintain bending radius and avoid sharp bends

• Perform insulation resistance and line performance tests after installation

2. Content Section

Fifteen-Pair Shielded Underground Telephone Cable Noan‑G15F

Description:
Noavar Niroo Paytakht is proud to present the “Noan‑G15F” cable; a fifteen-pair underground telephone cable with full foil shielding, designed for indoor and underground environments requiring multiple simultaneous 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‑G15F cable is ideal for urban or intercity projects needing several telephone lines along an underground route, offering environmental durability, stable signals, and reliable performance.

Key Features:

• Fifteen twisted pairs

• Full foil shield around the assembly

• Lightweight CCAM conductor with 60/0 structure

• Robust design for indoor and underground installation

• High insulation resistance testing

• Excellent performance in environmental conditions

3. Description, Applications, and Comparative Analysis

Suitable Applications:

• Underground telephone lines with a high number of pairs

• Underground or in-structure paths in telecommunication projects

• Areas with high potential for electromagnetic interference

• Urban or rural areas requiring multiple telephone lines along a single path

Advantages:

• Multiple simultaneous telephone lines without needing separate cables

• Effective protection against environmental noise thanks to the foil shield

• Reduced installation cost by using a single cable for multiple pairs

• Lighter and more cost-effective than all-copper cables

Disadvantages:

• Higher conductor resistance compared to all-copper cables

• Shield effectiveness decreases if grounding is improper

• Precise installation and adherence to standards are crucial

• Signal attenuation may be noticeable over longer distances

Comparison with Lower-Pair Models:

• Compared to one or two-pair cables, fifteen-pair cables have higher core density, which may increase crosstalk; careful pair twist length and continuous foil design are essential

• Production cost is relatively higher, but the benefit of multiple lines in a single cable is significant

Quality Assurance and Production Control:

• Precise control of strand count (60 strands) and conductor uniformity

• Ensuring foil thickness, adhesion, and quality

• Insulation tests, thermal aging, mechanical and vibration testing for samples

• Printing product name, Noavar Niroo Paytakht, technical specifications, and production date on the cable

• Providing insulation resistance and performance test reports to customers