Sea-Dog 12 AWG Black Primary Wire, 100 ft Tinned Spool
Sea-Dog 12 AWG Black Primary Wire, 100 ft Tinned Spool — Product description
Sea-Dog's 12-gauge black primary wire on a 100-foot spool. It's a single stranded tinned-copper conductor in PVC insulation, sized for the DC lighting, pump, and accessory circuits that fill up a boat. Tinned copper is the part that matters out here, it shrugs off the corrosion that eats bare wire in salt air.
This is Sea-Dog's 12-gauge black primary wire, wound on a 100-foot spool. It's a single stranded conductor built from tinned copper and wrapped in PVC insulation, which is exactly what you want for running DC circuits on a boat. The tinning is the part that matters out here. Bare copper corrodes fast in salt air, and once a conductor starts to green up under the jacket, resistance climbs and your lights dim or your pump slows down. Tinned copper shrugs that off for years.
Twelve gauge is the workhorse size for a lot of what lives on a boat. Cabin and courtesy lighting, nav light runs, small bilge and washdown pumps, accessory circuits at the helm. It's got enough copper to carry a moderate load without heating up, and the stranded construction keeps it flexible so you can snake it through a rigging tube or around a bulkhead without fighting it. Solid wire has no place on a boat that pounds through a chop. Stranding survives the vibration.
Black is the traditional color for DC negative and ground runs, so keeping a spool of it on hand makes your wiring easier to trace later. A hundred feet covers most single jobs with margin left over. Rewire a set of cabin lights, run a new circuit to a livewell pump, replace a corroded ground feed, and you'll still have wire on the spool for the next project.
A few install notes from experience. Tinned wire still wicks water at an open cut, so seal your terminations with adhesive-lined heat-shrink and you'll never think about them again. Use a ratchet crimper on your connectors and give every one a firm tug before you button things up. And the wire comes off the spool with a bit of curl. Pull off what you need, let it relax, then run it, and it'll lie in a lot cleaner.
Not sure 12 gauge is the right size for your run? Size it off the load and the round-trip distance. Longer runs and bigger loads want heavier wire to keep voltage drop in check. For typical lighting and light-duty pump circuits within a normal boat's run lengths, 12 gauge is right in the pocket.
Key Features
- 12 AWG stranded conductor, sized for lighting, nav lights, and light-duty pump and accessory circuits
- Tinned copper strands resist corrosion and wicking in salt air, so connections stay low-resistance for years
- PVC insulation in black, the traditional color for DC negative and ground runs
- Stranded construction stays flexible for tight runs and survives engine and hull vibration
- 100-foot spool covers most single wiring jobs with margin to spare
- Single-conductor primary wire for DC circuits
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 12 AWG Black Tinned Copper Primary Wire, 100 ft Spool |
|---|---|
| Brand | Sea-Dog |
| Manufacturer Part Number | 8012012 |
| UPC | 035514801157 |
| Wire Gauge | 12 AWG |
| Conductor Type | Stranded |
| Conductor Material | Tinned Copper |
| Insulation Material | PVC |
| Insulation Color | Black |
| Spool Length | 100 ft |
| Wire Type | Single-Conductor Primary Wire |
Frequently asked questions
Is this wire for AC or DC circuits?
It's single-conductor primary wire, which is what you run for DC circuits on a boat. Nav lights, cabin lighting, pumps, and accessory feeds. For AC shore-power runs you'd want a multi-conductor cable instead.
How many amps can 12-gauge tinned copper wire handle?
Twelve gauge is a moderate-load conductor. As a rule of thumb, ABYC ampacity tables put 12 AWG in the mid-20-amp range for runs inside hot engine spaces and higher for cooler locations. Always size off your actual load and round-trip run length to keep voltage drop under control.
Why stranded copper instead of solid?
Stranding stays flexible, so it's easier to route through tight spaces, and it holds up to the constant vibration a boat sees underway. Solid wire can work-harden and crack. That's why marine wire is stranded.
What does the tinning actually do?
Each copper strand gets a thin tin coating that fights corrosion. Bare copper greens up in salt air and resistance climbs. Tinned copper keeps connections clean and low-resistance far longer, which is why it's the standard for boats.
Does the black insulation mean anything?
Black is the traditional color for DC negative and ground conductors, so using it for those runs keeps your wiring easy to trace down the road. Keeping color conventions consistent saves you headaches at troubleshooting time.
How much wire is on the spool?
This is a 100-foot spool of 12 AWG. That's enough to knock out most single rewiring jobs with wire left over for the next one.
What's the downside of tinned copper wire?
Honestly, not much for marine use. It costs a little more than bare copper up front, and that's about it. The corrosion resistance pays for itself the first time you avoid chasing down a green, high-resistance connection.
