SKU: 18681740007

4B&S (20.29mm²) Red Single Core Automotive Cable per Metre

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Description

4B&S (20.29mm²) Red Single Core Automotive Cable per Metre4B&S (20. 29mm) Red Single Core Automotive Cable: High Current Power Delivery for Demanding Vehicle Systems Engineered for Reliable 12V, 24V, and 48V Automotive and Marine Applications The 4B&S (20. 29mm) red single core automotive cable is purpose built to handle high current loads in vehicle electrical systems, from starter motor circuits to auxiliary battery banks and high power accessories. With a 135A amp rating at 30C (derating factors apply),

4B&S (20.29mm²) Red Single Core Automotive Cable: High-Current Power Delivery for Demanding Vehicle Systems

Engineered for Reliable 12V, 24V, and 48V Automotive and Marine Applications

The 4B&S (20.29mm²) red single core automotive cable is purpose-built to handle high-current loads in vehicle electrical systems, from starter motor circuits to auxiliary battery banks and high-power accessories. With a 135A amp rating at 30°C (derating factors apply), this cable provides a robust pathway for power where standard wiring falls short. Its oxygen-free copper conductor and 90°C rated PVC insulation ensure consistent performance under the bonnet, in chassis runs, or within marine environments.

Unlike generic automotive wire, this cable uses fine-stranded copper for superior flexibility and vibration resistance, reducing the risk of fatigue failure in mobile installations. The thick insulation wall resists abrasion, oil, and fuel, making it suitable for engine bays and exposed underbody routing. Whether you're wiring a dual-battery system, a high-output alternator, or a large inverter, this cable delivers the current capacity and durability required.

Key Features

  • 135A current rating at 30°C — supports high-demand circuits with minimal voltage drop
  • 20.29mm² cross-sectional area — equivalent to 4B&S gauge, ideal for long cable runs
  • Oxygen-free copper conductor — maximises conductivity and resists corrosion
  • Fine-stranded construction — enhances flexibility for easier routing in tight spaces
  • 90°C PVC insulation — withstands engine bay heat and resists common automotive fluids
  • Rated to 120V DC maximum — suitable for 12V, 24V, and 48V systems
  • RoHS compliant — meets Australian and New Zealand safety standards

Why Cable Quality Matters in High-Current Circuits

Inadequate cabling is a common cause of voltage drop, overheating, and unreliable system performance. This 4B&S cable uses high-purity copper with a low electrical resistance of 0.9 ohm/km at 20°C, minimising energy loss across the conductor. The result is more efficient power transfer to your starter motor, winch, or auxiliary battery, and reduced heat buildup that can degrade insulation over time.

For installations where multiple cables are bundled or ambient temperatures exceed 30°C, derating is essential. *Note typical derating factors apply: for example, two cables bundled together require a 0.8 multiplier, reducing the effective ampacity to 108A. Always consult a professional installer to ensure compliance with system design and safety requirements.

Applications Beyond Standard Automotive Wiring

While optimised for automotive battery and starter circuits, this cable excels in a range of high-power 12V, 24V, and 48V applications:

  • Dual-battery systems in 4WDs, caravans, and camper trailers
  • High-output alternator and starter motor upgrades
  • DC-DC charger and solar charge controller connections
  • Large inverter installations (up to 120V DC)
  • Marine electrical systems requiring tinned copper alternatives (note: this is bare copper; consider tinned for direct saltwater exposure)
  • General high-current wiring in trucks, buses, and agricultural machinery

Built for Australian Conditions

Manufactured to stringent standards, this cable is designed to cope with the vibration, temperature extremes, and under-bonnet conditions typical of Australian vehicles. The robust PVC jacket provides excellent resistance to abrasion, oil, and fuel, while the fine-stranded copper core withstands repeated flexing without work-hardening and cracking.

Selecting the correct cable gauge is critical for safety and performance. The 4B&S size offers a practical balance between current capacity and physical dimensions (8.3mm O.D.), fitting through standard grommets and conduit while supporting loads up to 135A. For even higher currents, consider stepping up to 2B&S or larger.

Order Your 4B&S Red Automotive Cable Today

Upgrade your vehicle's electrical system with a cable that delivers dependable high-current performance. Add the 4B&S (20.29mm²) red single core automotive cable to your cart now and power your next adventure with confidence.

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SKU: 18681740007

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Reviewed in the United States on February 28, 2026
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If I could give this book 6 stars I would. The way the world is right now, I needed to do a deep dive into anger. And I needed to see how God wants me to handle my anger. There were some very challenging and humbling parts to this book that I needed to hear. All the application questions at the end of each chapter helped me solidify what I learned and what I needed to evaluate personally. Which leads me to the statement that this book was deeply personal to me and I am grateful for the changes it’s helped me make to reflect God more and myself less.
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John Beeson
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David Powlison’s Good and Angry is a powerful book. In the book Powlison dives deep into what anger is and then gets very practical about how to biblically deal with your own anger issues (issues, he assures us, we all have). From the outset, Powlison makes it clear that anger, while dangerous, can be handled to produce good. “At its core anger is very simple,” Powlison says, “It expresses ‘I’m against that’” (39). Powlison says that each of us handles anger differently. Some of us freeze over, some of us quietly brood, some of us simmer, some of us explode. Powlison encourages us not to look at the way others mismanage worse than us, but rather, how do we mismanage anger? Each type has their own blind spots. Powlison then dives into anger itself. Anger is about our displeasure toward something, so what are we displeased with? And why? How are we justified? Unjustified in our anger? And what do I want to happen? Anger is physiological. As embodied beings, anger manifests itself in us physiologically. How is it impacting me when I’m angry? Powlison then dives into mercy, what he calls a constructive displeasure, or constructive anger. When the constructive displeasure of mercy is functioning as it ought, it has four characteristics: patience (a wonderful biblical synonym of patience is “forbearance”), forgiveness (which is “mercifully unfair” (80)), charity (a spirit of magnanimity), and constructive conflict (“Mercy is not a free pass. It is an invitation to turn and repent” (94). All of these fundamentally point to the work of God and his righteous response of anger to our rebellion. “The constructive displeasure of mercy means the redemption of the world” (102). Powlison walks through how God’s anger works: through his righteous and holy response to our sin, to him taking his wrath upon his son on the cross. He concludes, “God’s wrath is your hope. God’s wrath is my hope. We don’t often hear that, but it appears everywhere in the Bible. Wrath is our hope because love masters anger” (121). The final portion of the book steps back and helps us move through analyzing our own anger. Powlison uses James 4:1-12 to help us analyze our own anger issues. At the heart of this analysis is James’s own analysis of his hearer, that they are fighting and quarrelling because of their “desires that battle within” them. In other words, if we have an anger problem (which we all do), we have a malformed desire problem. In other words, we have a heart problem. Significant in digging into this question is the ability to analyze my own motives. The issue isn’t what has happened with me, but is my heart and my heart’s motives and desires in the midst of any given situation. Key questions to ask myself when in a moment of anger are: “what do I want?” “what do I fear?” and “what do I most love?” (154-55). Powlison concludes with a strong word of hope. God is in the process of changing us and reshaping our heart. Our problem, Powlison says, is that we tend to talk to the wrong person in the midst of our anger – ourselves. But when we turn and talk to our Good Shepherd, we will experience hope and change. I’m so grateful for Powlison's Good and Angry. It is a profoundly biblical and wise book with both subtle and profound insights. I know I have been impacted by the book personally and will both turn to it in the future for personal use and as a resource for others who struggle with anger.
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Reviewed in the United States on April 21, 2017

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