Ancor Marine Grade Tinned Duplex Cable – 18/2 AWG, Red/Black, White Jacket, 500 ft | 121950

Ancor Marine Grade Tinned Duplex Cable – 18/2 AWG, Red/Black, White Jacket, 500 ft | Part 121950

Run clean, reliable DC circuits throughout your boat with the Ancor 121950 Marine Grade Tinned Duplex Cable. This 500-foot spool of 18/2 duplex wire pairs a red positive and black negative conductor under a single white common jacket — making it ideal for lighting circuits, accessory wiring, and any application where a two-conductor run needs to be routed neatly. Tinned copper conductors resist corrosion in saltwater and humid marine environments, and the construction exceeds UL Boat Cable standards for safety and durability. The outer jacket strips cleanly without damaging the inner conductors, saving time during installation.

Part Details

• Part Number: 121950
• Brand: Ancor
• Product Type: Marine Grade Tinned Duplex Cable
• Gauge: 18/2 AWG (two 18 AWG conductors)
• Conductor Colors: Red (positive) and Black (negative)
• Jacket Color: White
• Length: 500 feet (152.4 m) — bulk spool
• Conductor Material: Tinned copper
• Standard: Exceeds UL Boat Cable standards
• System: Marine DC electrical – general wiring

Compatible Applications

• Marine interior and exterior lighting circuits
• Accessory and instrument wiring on powerboats and sailboats
• Navigation light wiring
• Bilge pump, blower, and small accessory circuits
• Any marine DC application requiring 18 AWG two-conductor wiring
• Freshwater and saltwater vessel electrical installations
• ABYC-compliant wiring projects requiring UL-rated boat cable

Key Features

• Tinned copper conductors — superior corrosion resistance vs. bare copper in marine environments
• Exceeds UL Boat Cable standards — built to a higher specification than the minimum requirement
• Easy-strip white jacket — outer jacket removes cleanly without nicking inner conductors
• Color-coded conductors — Red/Black for straightforward polarity identification during installation
• 500-foot bulk spool — ideal for full-boat wiring projects or professional installers

Related Parts

• Ancor 18 AWG Tinned Primary Wire – 100 ft, Yellow (101010) — single-conductor 18 AWG
• Ancor 16 AWG Tinned Primary Wire – 100 ft, Black (102010)
• Ancor 12 AWG Tinned Primary Wire – 100 ft, Yellow (107010)
• Ancor 10 AWG Tinned Primary Wire – 100 ft, Black (108010)

Parts Desk Insights

The 121950 is the right choice when you’re doing a full wiring project and need a clean, two-conductor run for lighting or accessories — the duplex format keeps positive and negative together in one jacket, which speeds up routing through conduit, under gunwales, or behind panels compared to pulling two separate wires. The 500-foot spool is sized for professional installers or full-boat rewires; if you only need a short run for a single circuit, the 100-foot Ancor primary wire spools — like the 18 AWG single-conductor (101010) — are the more economical option. At 18 AWG, this cable is appropriate for low-current accessories and lighting; for bilge pumps, windlasses, or other higher-draw circuits, step up to 14 AWG or heavier.