Guide to Selecting 120mm Doublecore Armored Cables

Picture a bustling factory where machinery hums with relentless energy, powered by an uninterrupted flow of electricity. Or envision the intricate web of cables beneath city streets, silently delivering light and power to countless homes. Behind these scenes lies a critical component ensuring safe and reliable power transmission: armored cables. This article examines the 120mm² twin-core armored cable, detailing its characteristics, applications, and key selection criteria to inform your electrical engineering decisions.

As the name suggests, a 120mm² twin-core armored cable features two conductors, each with a cross-sectional area of 120 square millimeters, encased in a protective steel armor layer. This design provides exceptional mechanical strength and interference resistance, making it ideal for demanding power transmission environments.

The cable typically consists of the following components:

• Conductor: Stranded copper wires ensure optimal conductivity and flexibility.
• Insulation: Cross-linked polyethylene (XLPE) offers superior electrical insulation and heat resistance.
• Filler: PVC material fills gaps between conductors for structural integrity.
• Inner sheath: PVC protects the insulation from mechanical damage and chemical corrosion.
• Armor: Steel wire armor (SWA) provides robust protection against external forces.
• Outer sheath: Additional PVC shielding guards against moisture, corrosion, and UV radiation.

Compared to standard cables, the 120mm² twin-core armored variant offers distinct benefits:

• Enhanced durability: The steel armor withstands significant tension, compression, and impact.
• Superior EMI shielding: Minimizes electromagnetic interference for stable power delivery.
• Corrosion resistance: PVC sheathing protects against acids, alkalis, and salts.
• Extended lifespan: Rugged construction adapts to harsh conditions for long-term use.
• Fire safety: Flame-retardant properties help prevent fire spread.

These cables serve critical roles across multiple sectors:

• Industrial: Powers heavy machinery in factories, mines, and ports.
• Construction: Distributes electricity in high-rises, commercial complexes, and residential areas.
• Transportation: Supplies rail networks, highways, and tunnels with reliable power.
• Energy: Facilitates electricity transmission in power plants and substations.
• Infrastructure: Supports urban utilities like underground networks and water treatment facilities.

• Railway signaling and lighting systems
• Underground building power supply in dense urban areas
• Industrial plant electrical networks
• Protected installations in cable ducts and rooftop warehouses

When choosing these cables, consider these factors:

• Current capacity: Ensure the cable meets your system's amperage requirements, accounting for environmental conditions and installation methods.
• Installation environment: Select appropriate protection levels for moisture-prone or corrosive settings.
• Mechanical stress: Choose cables with adequate crush resistance for high-traffic areas.
• Compliance: Verify adherence to international standards like BS 5467.
• Manufacturer reputation: Prioritize established brands for quality assurance.
• Cost-effectiveness: Balance performance needs with budget constraints.

Proper handling ensures optimal performance:

• Engage certified electricians following safety regulations
• Use compatible accessories (terminals, joints)
• Maintain minimum bending radius (6x cable diameter)
• Avoid sharp objects during laying
• Secure cables with appropriate clamps

• Inspect regularly for sheath damage or deterioration
• Check connection points for corrosion or looseness
• Monitor insulation resistance periodically
• Prevent prolonged overload operation

Complementary components enhance system reliability:

• Terminals: Choose indoor (BW40) or outdoor (CW40) variants based on location
• Joints: Ensure proper insulation and connectivity between cable segments
• Clamps: Select size-appropriate fixtures (e.g., CC16) for secure mounting

Key parameters include:

• Standard voltage rating: 600/1000V
• Fixed bending radius requirement
• Current rating adjustments for environmental factors

Note that specialized applications may require higher voltage capacities, necessitating consultation with technical experts.

The 120mm² twin-core armored cable represents a robust solution for demanding electrical infrastructure needs. By understanding its technical attributes, appropriate applications, and proper handling requirements, engineers can ensure safe and efficient power distribution systems. As with all electrical components, prioritizing safety and compliance remains paramount.