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.

Shipping Notes
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SKU: 18681740007

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Irene zamora
Birmingham, US
★★★★★ 5
great book
Format: Kindle
I am really excited to meet the author at the book retreat this month. I really enjoyed this world that she built and most of the female main character Huntress is so awesome. She goes through a lot in this book and the ending; wow! I wouldn't have even guessed. I highly recommend everyone to read this book. I have been so lucky this year that almost all the books I have read have been, so far, 5 out 5 stars.
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Reviewed in the United States on June 2, 2026
A
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Anastasia Goygova
Massapequa, US
★★★★★ 4
Fallen for the Fallen Angel – A Guilty Pleasure Worth Every Page
Format: Kindle
There’s something deeply irresistible about a dark academia or trial-based setting, a brooding and arrogant fallen angel, and a fierce heroine with enough sass to go toe-to-toe with him. Wings So Wicked is exactly that kind of book—and I devoured it in just a couple of days. To be fair, the plot isn’t groundbreaking. If you’re looking for something fresh and innovative in terms of storyline, this might not be it. But if your reader heart beats faster at the mere mention of enemies-to-lovers, jealousy-fueled banter, magical trials, betrayals, and forbidden tension—you’ll feel right at home. It’s like catnip for those of us with this particular weakness. The chemistry between the leads could have used a slightly slower burn to make the tension sizzle longer, but I still found myself completely invested in their dynamic. There are moments and phrases that feel a bit cheesy or underdeveloped, but honestly? I didn’t care. The vibes were exactly what I wanted. This book isn’t trying to reinvent the genre—it’s here to give readers like me what we crave: high-stakes magical drama, angsty romance, and the thrill of watching a badass girl and her brooding counterpart clash and spark. If that sounds like your kind of story, Wings So Wicked will hit the mark. Here’s hoping Book 2 turns up the heat and keeps the magic alive.
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Reviewed in the United States on May 20, 2025
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Madi lohr
Alexandria, US
★★★★★ 5
my new favorite book
Format: Kindle
Ok so I never write reviews but this book was so good I felt the need to write this. Firstly your introduced to Huntyr you see her closed off hard core badass than towards the end you see the most subtle change and growth it’s amazing and the enemies to friends to lovers was just perfect, AND THE TWIST AT THE END GOT ME GOOD! You see one spicy scene the whole book but it doesn’t even MATTER BECAUSE THE BOOK WAS THAT GOOD. I’ve read 85 books in 2023-2024 so far and I’m pround to say this is my all time favorite. I’m so excited to read more of Emily Blackwoods books, this was my first time reading one of hers and I’m glad I did because HOLY!! Well done Emily well done
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Reviewed in the United States on February 23, 2024
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Robin
Draper, US
★★★★★ 4
Fast paced romantasy you will not want to put down!
Format: Kindle
4.25 stars! I LOVED this book with similar vibes to Hush Hush, Fourth Wing, and The Serpent and the Wings of Night! It was fast paced with easy world building and will keep you turning the pages late into the night because you will not want to put it down! Huntyr is a fierce bad@ss FMC trained to kill vampyres her entire life. She is sent on a mission to go to the academy and earn her spot into The Golden City. Upon arrival, she is forced to room with the delicious fallen angel, Wolf, who is the only one who knows about her assassin identity. The romance, the plot twists, the secrets revealed, the battles, and the tantalizing training scenes had me hooked! And that ending…. I’m holding my breath in need to know hell! Read if you love: 🪽 Fae, Vampyres, Fallen Angels 🪽 Academy setting with magical trials 🪽 Forced proximity and slow burn 🪽 Rivals to lovers 🪽 Hidden identities and secrets 🪽 Tend your wounds “𝘖𝘧 𝘤𝘰𝘶𝘳𝘴𝘦 𝘐 𝘸𝘢𝘴 𝘸𝘢𝘵𝘤𝘩𝘪𝘯𝘨 𝘺𝘰𝘶. 𝘐 𝘤𝘰𝘶𝘭𝘥𝘯’𝘵 𝘭𝘰𝘰𝘬 𝘢𝘸𝘢𝘺 𝘧𝘰𝘳 𝘢 𝘮𝘰𝘮𝘦𝘯𝘵, 𝘦𝘷𝘦𝘯 𝘪𝘧 𝘐 𝘵𝘳𝘪𝘦𝘥.” “𝘐𝘧 𝘺𝘰𝘶 𝘸𝘢𝘯𝘵 𝘮𝘦 𝘰𝘯 𝘮𝘺 𝘬𝘯𝘦𝘦𝘴, 𝘏𝘶𝘯𝘵𝘳𝘦𝘴𝘴, 𝘢𝘭𝘭 𝘺𝘰𝘶 𝘩𝘢𝘷𝘦 𝘵𝘰 𝘥𝘰 𝘪𝘴 𝘢𝘴𝘬.” “𝘠𝘰𝘶 𝘥𝘰 𝘯𝘰𝘵 𝘬𝘯𝘰𝘸 𝘵𝘩𝘦 𝘷𝘪𝘰𝘭𝘦𝘯𝘤𝘦 𝘵𝘩𝘢𝘵 𝘳𝘶𝘯𝘴 𝘵𝘩𝘳𝘰𝘶𝘨𝘩 𝘮𝘺 𝘷𝘦𝘪𝘯𝘴, 𝘣𝘦𝘨𝘨𝘪𝘯𝘨 𝘮𝘦 𝘵𝘰 𝘰𝘣𝘭𝘪𝘵𝘦𝘳𝘢𝘵𝘦 𝘢𝘯𝘺𝘰𝘯𝘦 𝘸𝘩𝘰 𝘭𝘢𝘺𝘴 𝘢 𝘩𝘢𝘯𝘥 𝘰𝘯 𝘺𝘰𝘶.”
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Reviewed in the United States on June 12, 2024
B
Verified Purchase
Bernadette Smith
Phoenix, US
★★★★★ 5
Excellent Rivals to Lovers!!
Format: Kindle
The tension and banter between Huntyr and Wold was delectable. I absolutely love the fallen angel and all of his flaws. Huntyr is amazing too being a badass FMC with some major trauma. The world building was great and I enjoyed the training aspect of the story. The writing was immersive and was in the story the whole time. The ending had quite a twist that I hadn’t anticipated and made my jaw DROP. Excellent job! I also loved the narration. Laura is one of my fave narrators!
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Reviewed in the United States on August 15, 2025

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