100m Roll of KEY 4B&S (20.29mm²) Twin Core Automotive Cable

100m Roll of KEY 4B&S (20.29mm²) Twin Core Automotive Cable

Heavy-Duty Twin Core Automotive Cable for Reliable Power and Earth Connections

The 100m Roll of KEY 4B&S (20.29mm²) Twin Core Automotive Cable is designed for high-performance DC power applications where reliability, efficiency, and durability are essential. Featuring two insulated conductors within a single outer sheath, this premium twin core cable simplifies installation while providing a neat, professional wiring solution for automotive, marine, caravan, off-grid, and industrial electrical systems. Manufactured using Oxygen Free High Conductivity (OFHC) copper, it delivers superior current flow, reduced voltage drop, and dependable long-term performance.

About KEY Tubing & Electrical

KEY Tubing & Electrical (KTE) is an Australian-owned manufacturer with over 60 years of industry experience supplying electrical, cable, tubing, and custom-engineered solutions to industries across Australia and around the world. Based in South Australia, KEY is known for its commitment to quality manufacturing, rigorous quality standards, and reliable products designed for demanding automotive, electrical, industrial, and resource sector applications. KEY continues to support Australian industry with a strong focus on performance, durability, and dependable engineering.

Premium OFHC Copper for Maximum Conductivity

At the heart of this 4B&S twin core automotive cable is high-purity OFHC copper, which provides lower electrical resistance compared to standard copper conductors. This results in improved efficiency, reduced heat generation, and better voltage retention across longer cable runs. Whether powering battery systems, inverters, chargers, or auxiliary equipment, the cable helps ensure stable and consistent power delivery.

The flexible multi-strand conductor design also improves durability in environments subject to vibration, movement, and temperature fluctuations. This makes it ideal for installations in vehicles, boats, caravans, heavy machinery, and renewable energy systems where long-term reliability is critical.

Ideal for 12V, 24V and 48V Electrical Systems

With a conductor size of 20.29mm² per core (4B&S), this cable is commonly used for medium to high-current applications requiring both positive and negative conductors within a single cable assembly. The twin core design reduces installation time while providing additional protection against abrasion and environmental exposure. It is suitable for modern 12V automotive systems, 24V commercial vehicle installations, and 48V lithium battery applications.

Common Applications Include:

• Dual battery systems in 4WDs and touring vehicles
• Caravan and camper trailer battery installations
• Marine battery banks and onboard electrical systems
• DC-DC charger and battery charger wiring
• Solar battery storage and off-grid power systems
• Inverter installations and auxiliary power distribution

Built for Harsh Australian Conditions

Manufactured to comply with AS/NZS 1125 conductor standards and AS/NZS 3808:2000 insulation requirements, this cable is designed to handle the challenges of demanding automotive and industrial environments. The V90 insulation offers excellent resistance to heat, abrasion, oils, fuels, and common automotive chemicals while maintaining flexibility for easier installation.

The twin core construction keeps positive and negative conductors neatly contained within a durable outer sheath, helping to reduce cable clutter and improve protection. This makes it particularly popular for long cable runs between batteries, chargers, solar systems, and auxiliary equipment.

Key Features & Specifications

• Conductor Size: 20.29mm² per core (4B&S)
• Twin core design for positive and negative wiring circuits
• Premium Oxygen Free High Conductivity (OFHC) copper conductors
• Suitable for 12V, 24V and 48V electrical systems
• Low voltage drop for efficient power transfer over long distances
• Flexible multi-strand construction for easier installation
• V90 insulation for superior durability and heat resistance
• Manufactured to AS/NZS 1125 and AS/NZS 3808:2000 standards
• 100m roll ideal for workshops, fleet maintenance and large-scale projects

Perfect for Caravan, Marine, Off-Grid and Industrial Applications

Whether you're installing a 4WD dual battery system, wiring a caravan lithium battery setup, connecting a marine battery bank, building an off-grid solar power system, or completing a commercial electrical installation, the KEY 4B&S (20.29mm²) Twin Core Automotive Cable provides the strength, conductivity, and reliability required for professional-grade results. Suitable for caravan, RV, marine, off-grid, industrial, commercial vehicle, solar, and battery storage applications.

Upgrade your power system today with KEY 4B&S Twin Core Automotive Cable and enjoy efficient, dependable power delivery across every installation.