30m Roll of 8B&S (7.7mm²) Twin Core Marine (Tinned) Cable

8B&S Twin Core Marine Cable: Tinned Copper for Reliable Onboard Power

Engineered for Harsh Marine Environments — 30 Metre Bulk Roll

This 8B&S (7.7mm²) twin core marine cable is purpose-built to deliver consistent, low-resistance power in demanding marine and coastal applications. Each conductor is made from 96 strands of 0.32mm tinned copper wire, providing excellent flexibility and superior corrosion resistance compared to bare copper. The tinning protects against saltwater, moisture, and humidity, reducing the risk of premature failure in bilge areas, engine rooms, and exposed deck runs.

Supplied on a convenient 30 metre roll, this cable is ideal for wiring battery banks, winches, solar regulators, and high-current DC circuits on yachts, powerboats, and commercial vessels. The twin core configuration (red and black) simplifies installation and polarity identification, while the robust double-insulated construction meets the requirements of AS/NZS 3808 for safety and performance.

Why Tinned Copper Matters

Standard automotive or building wire uses bare copper, which oxidises rapidly in moist, salty air. Oxidation increases electrical resistance, generates heat, and can lead to voltage drop or connection failure. Tinned copper conductors resist this corrosion, maintaining low resistance and reliable current flow over the life of the installation. For critical systems such as navigation lights, bilge pumps, and communication equipment, this reliability is essential.

Key Features

• 59A current rating (JASO D609 at 30°C) — suitable for high-demand DC circuits; note typical derating factors apply for bundling and elevated temperatures
• RoHS compliant 5V90 P.V.C. insulation and sheath — flame retardant, oil resistant, and UV stabilised for above and below deck use
• Compact 7.1 x 12.5mm oval profile — easy to route through conduits, bulkheads, and tight spaces
• Red and black cores — clear polarity identification reduces installation errors
• 30 metre bulk roll — cost-effective for larger projects or multiple cable runs

Built to Australian and International Standards

Manufactured to AS/NZS 1125 for tinned copper wire and insulated to AS/NZS 3808, this cable meets the stringent requirements for marine and automotive low-voltage wiring. The 5V90 P.V.C. compound offers a balance of flexibility, abrasion resistance, and thermal endurance, with a maximum conductor temperature of 90°C. This ensures safe operation in engine compartments and other high-temperature zones when installed according to applicable derating guidelines.

Applications Beyond the Water

While optimised for marine use, this cable is equally effective in other environments where corrosion resistance and durability are priorities. Use it for:

• Caravan and RV auxiliary power systems
• 4WD dual battery setups and winch wiring
• Off-grid solar installations in coastal or humid regions
• Industrial equipment exposed to moisture or chemicals

The tinned copper construction and UV-stabilised sheath make it a versatile choice for any 12V, 24V, or 48V DC application where long-term reliability is critical. The cable is rated for a maximum DC voltage of 120V, making it suitable for higher-voltage systems as well.

Installation Notes

To achieve the full 59A rating, ensure adequate ventilation and avoid bundling multiple cables tightly together. Refer to the derating tables for ambient temperatures above 30°C or when grouping more than two cables. Always use appropriately sized terminals and strain relief to maintain connection integrity in high-vibration environments.

Upgrade Your Marine Electrical System Today

Equip your vessel with cable that withstands the elements. Order the 30m Roll of 8B&S Twin Core Marine (Tinned) Cable and build a safer, more dependable electrical system for your next voyage.