Marine Cable By the Roll

Premium Marine Cable By the Roll for Boat Electrical Systems

Undertaking a complete boat rewire or running new power lines for heavy-duty off-grid marine applications requires significant lengths of high quality wire. Our selection of tinned marine cable by the roll is designed specifically for the harsh, corrosive environments found in saltwater and freshwater vessels. By purchasing in bulk 30m rolls, you ensure you have ample wiring for expansive marine projects, workshop inventory, or comprehensive electrical upgrades.

Marine environments are notoriously tough on electrical systems. Salt, moisture, and constant vibration can quickly degrade standard bare copper wire. That is why our bulk marine cables feature high-grade tinned copper conductors. The tinning process coats each individual copper strand, providing an essential barrier against oxidation and corrosion, ensuring your boat's electrical connections remain highly conductive and safe for years of reliable service.

Why Choose Tinned Marine Wire?

• Corrosion Resistance: Tinned copper strands prevent the black oxidation that plagues standard bare copper in marine environments.
• Vibration Tolerance: Finely stranded flexible cores withstand the constant motion and pounding of boat travel without fatiguing.
• Robust Insulation: Thick, durable outer sheathing protects against moisture, oil, fuel, and abrasion while remaining flexible for tight routing.
• Cost-Effective Projects: Bulk 30m rolls provide the volume needed for complete vessel rewires at a better scale for professional marine electricians and dedicated DIYers.

Comprehensive Sizes for Every Marine Application

Whether you are wiring high-draw appliances or running long distribution lines across a catamaran, we offer bulk rolls to suit your power demands. Our range includes heavy-duty 2B&S (32mm²) single core cables in red and black, which are ideal for high-current applications like anchor winches, bow thrusters, and marine inverter chargers. For general distribution, dual battery setups, and medium-draw marine electronics, our 8B&S (7.7mm²) and 6B&S (13.5mm²) twin core marine cables provide the perfect balance of flexibility and current capacity.

To complete your installation, ensure you match your bulk cable with the appropriate marine-grade cable lugs and heavy-duty heat shrink tubing to keep every connection watertight and secure.

Sizing or selection tips that help shoppers match products to their setup

Selecting the correct cable size is critical for safety and efficiency on any boat. Marine electrical systems, primarily running on 12V or 24V, are highly susceptible to voltage drop over long distances. Here is how to match our bulk rolls to your setup:

8B&S (7.7mm²) Twin Core: Best suited for medium-current circuits. Use this for running power to distribution fuse blocks, marine refrigerators, or moderate solar array connections where the cable run is relatively short.

6B&S (13.5mm²) Twin Core: A highly versatile heavy-duty cable. Ideal for connecting marine battery chargers, dual battery charging systems, and higher output solar controllers to your house battery bank.

2B&S (32mm²) Single Core: Designed for serious power transfer. This heavy gauge wire is essential for marine inverters, heavy anchor winches, engine starting circuits, and interconnecting large deep cycle battery banks. Always use matching red and black cables to clearly identify positive and negative circuits.

When running cable through bulkheads or tight spaces, we recommend using protective split tube conduit to prevent chafing and wear against the vessel's structure.

As an Australian family business with a decade of experience in off-grid and marine power, we know how vital reliable wiring is when you are miles offshore. We pride ourselves on supplying only high quality products backed by our dedicated before and after support. Shop our range of marine cable by the roll today and enjoy fast dispatch to keep your marine electrical project moving forward seamlessly.