SKU: 31966393480

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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 31966393480

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Robert
Grantham, US
★★★★★ 5
Metamucil 4-in-1 Psyllium Husk GLP-1 Friendly Fiber Supplement, Sugar-Free, 180 teaspoons, Orange
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
I started taking Metamucil after my doctor recommended boosting my daily fiber intake, and I genuinely wish I had started sooner. This sugar-free orange flavor has become a non-negotiable part of my morning routine. First, the taste — for a sugar-free supplement, it's surprisingly pleasant. The orange flavor is light and natural, not artificial or overpowering. Mixed into a glass of cold water, it goes down easily without that chalky, gritty aftertaste I dreaded from other fiber products I've tried in the past. The 4-in-1 benefits are the real selling point for me. I've noticed a genuine difference in my digestive regularity, I feel fuller between meals (which has helped me make better snack choices), and my energy levels feel more stable throughout the day. As someone on a GLP-1 medication, I was thrilled to find a fiber supplement specifically formulated to complement that — it fills a real gap in the market. The 180-teaspoon count is outstanding value. This container lasts a long time, which means fewer reorders and a lower cost per serving than most comparable products. The scoop is easy to use and the powder dissolves well with a quick stir — no clumping. My digestion has genuinely improved since making this a daily habit. Less bloating, more consistency, and I just feel better overall. It's one of those quiet little wellness wins that adds up over time. If you're on the fence, just try it. Simple, effective, great value — this is now a permanent fixture in my pantry. Cannot recommend it highly enough.
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Reviewed in the United States on May 25, 2026
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Rick
San Leandro, US
★★★★★ 5
Does its job very well
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
Been using Metamucil for years. Because it is a quality product that dissolves well in water, tastes fine, and a very easy way to stay regular. Considering what it does for my system, it is a cost efficient way to get more fiber in my diet with no side effects.
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Reviewed in the United States on April 14, 2026
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Kathy
Bozeman, US
★★★★★ 5
Excellent product!
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
I held on to this product for months before trying it. Wow! Not sure what took me so long, but I am so impressed. First of all, it is easy to drink - just do it quickly. The taste is surprisingly refreshing. Even more important, it works. If you have IBS or other digestive issues, you may be pleasantly surprised at how it helps these issues. I just regret I didn’t start using it years ago. I take at least two drinks a day, sometimes only one.
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Reviewed in the United States on May 27, 2026
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Danny Y.
Battle Creek, US
★★★★★ 4
Works well and easy to add to a daily routine
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
This Metamucil works well overall. It mixes pretty easily, the orange flavor is decent, and it’s been a simple way to add more fiber into my daily routine. I like that it’s sugar-free and uses psyllium husk, so it feels like a practical option for digestive health without adding extra sugar. The texture is what you’d expect from a fiber powder, so you do need to drink it fairly quickly after mixing. Overall, it does what I bought it for. Taking off one star only because it’s still a fiber drink, so the taste and texture may not be for everyone, but it’s a solid product.
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Reviewed in the United States on May 28, 2026
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The Music Man
Natrona Heights, US
★★★★★ 5
This really works and tastes great
Size: 2.3 Pound (Pack of 1), Style: Sugar Free 180 count
Top notch quality The only brand I buy !!!!!!
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Reviewed in the United States on May 4, 2026

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