Ancor Marine Grade 121910 Duplex Cable 18/2 - Marine-Ready Wire

In this review the Ancor Marine Grade 121910 Duplex Cable 18/2 is evaluated for boat owners, electricians and DIYers who need a flexible, corrosion-resistant run of marine wire. The bottom line: this cable is best for applications where long runs must resist salt, vibration and cold because its tinned copper stranding and proprietary vinyl insulation combine to resist corrosion and stay pliable in harsh conditions. Our review finds it especially useful where routing through tight spaces and reliable solder or crimp terminations are required.

Key Features

• Tinned copper stranding: provides maximum protection against corrosion for long service life in saltwater environments.
• Ultra flexible stranding: Type 3/Class K construction lets the cable bend around tight corners and resists fatigue from vibration and movement.
• Premium vinyl insulation: proprietary material stays flexible in extreme cold and resists battery acid, oil and UV exposure for reliable insulation performance.
• 600 volt insulation rating: exclusive insulation is rated at 600 volts, suitable for typical marine electrical systems and added safety margin.
• Easy jacket removal and abrasion resistance: outer jacket is designed for straightforward strip and provides solid protection where runs pass through chafe points.

Who It's For

This duplex 18/2 cable is aimed at boat owners wiring lighting, instruments, bilge pumps and accessories where corrosion resistance and flexibility matter. Marine electricians and DIY installers will appreciate the tinned conductors that solder cleanly and the color-coded conductors that follow ABYC standards for easier installation.

It is not intended for household branch circuits or applications that require enclosures rated above the listed temperature and voltage; users needing insulated multi-conductor jackets for complex control runs should select a different cable type. For standard DC marine wiring and accessory feed runs, this cable is an excellent fit.

Pros & Cons

Pros

• High corrosion resistance from tinned copper stranding makes it durable in marine environments.
• Very flexible Type 3/Class K stranding reduces fatigue and eases routing in tight spaces.
• Proprietary vinyl insulation resists cold, UV, oil and battery acid, maintaining flexibility.
• Color-coded inner conductors simplify installation and meet ABYC convention.

Cons

• Flat duplex form limits use where round multi-conductor cable or thicker jacket is required; choose alternatives for heavy-duty or bundled control runs.
• Only supplied in a 100 ft length for this listing, which may be more than needed for small jobs.

Specifications

Product	Duplex cable, flat
Conductor size	18/2 AWG (2 x 0.8 mm2)
Length	100 ft
Conductor material	Tinned copper stranding
Insulation rating	600 volts, 105 C dry
Temperature	105 C dry / 75 C
Color	Black/Red, color-coded to ABYC

Our Verdict

The Ancor 121910 18/2 duplex cable is a practical, cost-effective choice for marine DC wiring where corrosion resistance and flexibility are priorities. Its tinned stranding and durable vinyl insulation make it a dependable option for lighting, pumps and accessory circuits, delivering real value for owners who need easy routing and long-term reliability on boats.

Frequently Asked Questions

Is this cable suitable for bilge pump wiring?
Yes. The 18/2 duplex construction and tinned copper make it suitable for typical bilge pump and accessory DC circuits on small to medium boats.

Will the insulation stay flexible in cold weather?
Yes. The proprietary vinyl insulation is designed to remain flexible even in extreme cold and resists UV, oil and battery acid.

Can the conductors be soldered or crimped easily?
Yes. Customers report the tinned copper splices and solders cleanly and also accept crimp terminals well for reliable terminations.