6B&S (13.5mm²) Twin Core Automotive Cable: High-Current Wiring for 12V, 24V, and 48V Systems

Engineered for Demanding Automotive and Off-Grid Installations

The 6B&S (13.5mm²) twin core automotive cable delivers reliable power transmission for high-current circuits in vehicles, caravans, marine setups, and off-grid energy systems. With a 103A rating at 30°C (JASO D609), this cable is built to handle the rigorous demands of starter motor feeds, auxiliary battery charging, inverter connections, and solar array wiring. Its robust construction ensures consistent performance across 12V, 24V, and 48V DC applications, making it a versatile choice for professional installers and DIY enthusiasts alike.

Unlike generic auto cable, this product features plain annealed stranded copper conductors for superior flexibility and conductivity, combined with V90HT PVC insulation that withstands temperatures up to 90°C. The durable black outer sheath houses both red and black cores, simplifying polarity identification and protecting against abrasion, moisture, and UV exposure. Whether you're wiring a dual-battery system in a 4WD, upgrading a caravan solar setup, or installing a high-power inverter, this cable provides the durability and electrical efficiency required for long-term reliability.

Key Features

• 103A current rating at 30°C (JASO D609) for high-demand circuits; note typical de-rating factors apply for bundling and elevated temperatures
• 13.5mm² conductor area (equivalent to 6 AWG) with 168/0.32mm fine-stranded copper for excellent flexibility and minimal voltage drop
• V90HT PVC insulation rated to 90°C, providing thermal resilience in engine bays and under-bonnet environments
• UV-stabilised outer sheath resists degradation from sunlight, ideal for exposed outdoor runs on trailers, caravans, and solar arrays
• RoHS compliant and manufactured to Australian and New Zealand safety standards for assured quality
• Sold per metre, allowing precise length customisation and reduced waste for any project

Superior Construction for Critical Connections

At the core of this cable is oxygen-free, high-conductivity copper, which minimises resistive losses and ensures efficient power delivery over longer distances. The fine stranding (168 strands of 0.32mm) enhances flexibility, making it easier to route through tight spaces, conduit, or corrugated tubing without compromising conductor integrity. The V90HT insulation not only handles high temperatures but also offers excellent resistance to oils, fuels, and common automotive chemicals, reducing the risk of insulation breakdown in harsh under-bonnet conditions.

The twin-core configuration simplifies installation by providing both positive and negative conductors in a single, easy-to-manage cable. The black outer sheath is UV-stabilised, preventing cracking and embrittlement when exposed to direct sunlight—a common failure point in inferior cables used for solar panel wiring or external vehicle lighting. With a nominal outer diameter of 7.2mm, this cable strikes a balance between current-carrying capacity and manageable size, fitting standard cable glands, lugs, and connectors.

Applications: From Engine Bays to Solar Arrays

This 6B&S twin core cable is engineered for a wide range of high-current DC applications:

• Automotive and 4WD: Dual-battery systems, winch power feeds, starter motor cables, and high-output alternator wiring
• Caravan and RV: Battery-to-inverter connections, solar charge controller wiring, and main DC distribution
• Marine: Trolling motor power, battery bank interconnects, and onboard charging systems (note: not for submerged use)
• Off-Grid Solar: PV array to charge controller runs, battery interconnects, and inverter cabling for 12V/24V/48V systems
• General Low-Voltage Wiring: High-power LED lighting, pump circuits, and industrial equipment where reliable DC power is critical

While this cable is rated for up to 120V DC maximum, it is not intended for fixed mains voltage (240V AC) installations. Always consult a qualified auto electrician for complex installations, and refer to the derating tables when bundling multiple cables or operating in high-temperature environments.

Why Choose This Cable Over Standard Auto Cable?

Many generic automotive cables use lower-grade copper or aluminium conductors, which can lead to increased voltage drop, overheating, and premature failure. This 6B&S cable uses plain annealed copper with a precisely controlled strand count, ensuring consistent resistance (1.4 ohm/km at 20°C) and reliable ampacity. The V90HT insulation offers a higher temperature rating than standard PVC, reducing the risk of melting or short circuits in hot engine compartments. Additionally, the UV-stabilised sheath addresses a key weakness of typical twin-core cables, which often degrade when used for external solar or trailer wiring.

By investing in this premium cable, you reduce the risks of voltage drop, intermittent connections, and insulation failure—problems that can lead to battery undercharging, inverter shutdowns, or even electrical fires. The per-metre pricing also means you only purchase what you need, minimising waste and cost for custom-length runs.

Technical Specifications at a Glance

• Conductor: Plain annealed stranded copper (168/0.32mm)
• Nominal Area: 13.5mm² (6 B&S / approx. 6 AWG)
• Current Rating: 103A at 30°C (JASO D609)
• Insulation: V90HT PVC (red and black cores)
• Outer Sheath: UV-stabilised black PVC
• Max DC Voltage: 120V
• Temperature Range: -40°C to 90°C
• Standards: RoHS, AS/NZS compliant

Note: Current ratings are based on single cable in free air at 30°C. Derating factors apply for elevated temperatures and bundled installations—refer to the provided derating tables for accurate sizing.

Power Your Project with Confidence

Equip your vehicle, caravan, or off-grid system with a cable that matches the quality of your components. Order the 6B&S (13.5mm²) Twin Core Automotive Cable per metre today and ensure your high-current circuits are built on a foundation of reliability and performance.