Ancor #4 Yellow 50' Spool Tinned Cooper

The Ancor #4 Yellow 50' Spool Tinned Copper marine battery cable is the foundation of a reliable electrical system for any serious boater or marine technician. After years running boats in saltwater and freshwater environments, knowing your battery interconnects won't fail is non-negotiable. This 4 AWG tinned copper wire meets or exceeds UL 1426, ABYC (American Boat and Yacht Council), and U.S. Coast Guard CFR Title 46 standards—the same certifications demanded on charter vessels and commercial fishing boats where electrical integrity is life-critical.

Tinned copper construction is the marine industry gold standard because it resists corrosion far better than bare copper in the salt spray and moisture that surrounds boat hulls. The 4 AWG gauge (19mm diameter) provides the current capacity needed for main battery runs, starter circuits, and high-load alternator feeds on vessels from center consoles to cruising sailboats. The 50-foot spool length gives you flexibility to route cable through tight engine compartments, down to bilge-mounted batteries, or across cabin sole to auxiliary power banks without unnecessary splices that create voltage drop and potential failure points. Yellow insulation aids circuit identification during troubleshooting and installation, a practical touch that separates marine-grade products from automotive alternatives.

This cable suits primary battery-to-engine connections, house-bank wiring, and shore power leads on boats of 25 feet and larger where main feed requirements exceed 100 amps. If you're rewiring a cruiser's electrical system, upgrading a center console's charging architecture, or building a redundant battery setup for extended offshore work, Ancor tinned copper cable ensures your investment withstands decades of salt air and vibration. Installation is straightforward with standard marine lugs and crimpers; proper termination (not soldering) preserves the wire's integrity and ensures UL/ABYC compliance. For any boater or technician who understands that electrical failure at sea is not an option, this is the cable to specify.