Sea-Dog 18/2 AWG Duplex Marine Wire 100ft | 8018202
Sea-Dog 18/2 AWG Duplex Marine Wire 100ft | 8018202 — Product description
Sea-Dog's 18/2 duplex is the two-conductor wire you pull for low-draw 12-volt circuits, nav light feeds, courtesy lights, a bilge float switch. Red and black in one flat, tinned-copper bundle, UL and ABYC rated, 100 feet on the spool.
Sea-Dog's 18/2 duplex wire is the two-conductor bundle you reach for when you're running a low-draw 12-volt circuit and you want it done right the first time. Red and black conductors run side by side inside a flat PVC jacket, so you've got your positive and negative in a single pull. No taping two separate wires together, no guessing which lead is which halfway down the gunwale.
The gauge tells you what it's for. 18 AWG handles the light stuff. Courtesy lights, a nav light feed on a short run, a bilge float switch, cabin LED strips, a fuel sender, a small accessory you're wiring into a fused panel. It's not the wire for a windlass or a big pump, and we'd steer you to a heavier gauge for anything pulling real amps. But for the dozens of little circuits on a boat, 18/2 is the honest workhorse.
What makes it marine wire and not the stuff at the hardware store is the tinning. Every copper strand is coated in tin, so when moisture finds its way in, and on a boat it always does, the copper underneath doesn't corrode and turn green. Bare copper wicks water and goes brittle at the connections. Tinned copper keeps conducting for years. That's why the ABYC calls for it and why this wire carries the UL and ABYC rating.
The flat encasement matters more than you'd think. A flat jacket lies down against a stringer or inside a raceway instead of rolling around, and it's easier to staple or clip in a clean run. You get 100 feet on the spool, which is enough to wire a small boat's accessory circuits several times over or keep a good working length in the shop.
Strip it, crimp on a marine heat-shrink terminal, and you're done. It plays nice with standard 18-gauge connectors. If you're not sure what gauge a given circuit needs, tell us the load and the run length and we'll point you the right way.
Key Features
- 18 AWG two-conductor duplex, sized for low-draw 12-volt circuits like nav lights, sensors, and cabin LEDs
- Tinned copper strands resist corrosion where bare copper wicks water and turns green at the connections
- Red and black conductors in one flat jacket, positive and negative in a single pull
- PVC insulation with a flat encasement that lies against stringers and clips into clean runs
- UL and ABYC rated marine boat cable, not hardware-store wire
- 100-foot spool, enough to wire a small boat's accessory circuits several times over
Why Buy from NVN Marine
- Authorized Sea-Dog reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Sea-Dog 18/2 AWG Duplex Tinned Marine Wire, 100 ft Spool, Black/Red |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 8018202 |
| UPC | 035514802840 |
| Wire Gauge | 18 AWG |
| Conductors | 2 (Duplex) |
| Conductor Colors | Black / Red |
| Conductor Material | Tinned Copper |
| Insulation | PVC |
| Encasement | Flat |
| Spool Length | 100 Feet |
| Certifications | UL / ABYC |
Frequently asked questions
What does 18/2 mean?
18 is the wire gauge (18 AWG) and 2 is the number of conductors. So it's a duplex wire, two insulated conductors, one red and one black, run together inside a single flat jacket.
What can I use 18-gauge wire for?
Low-draw 12-volt circuits. Courtesy and cabin lights, a nav light feed on a short run, a bilge float switch, a fuel sender, small fused accessories. For a windlass, a big pump, or any high-amp run, step up to a heavier gauge.
Why does the copper need to be tinned?
Because it's going on a boat. Moisture always finds its way in, and bare copper wicks water, corrodes, and turns green at the connections. Tinned copper is coated in tin so it keeps conducting for years. It's why the ABYC calls for it.
Is this the paired red and black wire?
Yes. Both conductors run side by side in one flat jacket, red for positive and black for negative, so you pull both legs of the circuit in a single run.
How long is the spool?
100 feet. That's enough to wire a small boat's accessory circuits several times over, or to keep a solid working length on the shelf in the shop.
Is it ABYC compliant?
It carries both the UL and ABYC rating, so it meets the standard for boat wiring. Pair it with tinned, marine-grade heat-shrink terminals to keep the whole circuit to spec.
