{"product_id":"sea-dog-12-3-awg-triplex-marine-cable-250ft-spool","title":"Sea-Dog 12\/3 AWG Triplex Marine Cable, 250ft Tinned Copper Spool","description":"\u003cp class=\"nvn-hero\"\u003eSea-Dog's 12\/3 AWG triplex is the flat, tinned-copper boat cable you reach for when you're running three conductors of power. 250 feet on the spool, white, green, and black conductors, UL and ABYC certified. Rig it in once and forget about it.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eSea-Dog's 12\/3 AWG triplex is the flat, three-conductor boat cable you pull off the shelf when you need to run power the right way. Three 12-gauge stranded conductors, colored white, green, and black, all encased in a single flat PVC jacket. It comes on a 250-foot spool, and every strand is tinned copper. That tinning is the whole point of buying marine cable instead of the stuff at the hardware store.\u003c\/p\u003e\n\u003cp\u003eHere's why tinning matters. Bare copper looks fine the day you install it, then a season later you pull back a connector in the bilge and find green crust creeping up the strands. Salt air and moisture do that. Tinned copper has a thin coating on every strand that holds off corrosion for years, so your connections stay tight and your voltage drop stays where you calculated it. On an open boat or anywhere near the bilge, it isn't optional.\u003c\/p\u003e\n\u003cp\u003eThe flat encasement is easy to route. It lies against a stringer or a hull side without the bulk of three round cables zip-tied together, and the stranded conductors stay flexible enough to work through tight chases. We run this for AC shore-power feeds to a panel, for three-wire DC circuits, and for anywhere you want hot, neutral, and ground, or positive, negative, and a switched leg, carried in one clean run. Twelve gauge handles moderate loads comfortably.\u003c\/p\u003e\n\u003cp\u003eNot sure whether you need triplex or duplex? It comes down to how many conductors your circuit calls for. Triplex gives you three, so it's the pick for AC feeds that need hot, neutral, and a safety ground, or for any DC job where you want a third conductor for a switched or sensing leg. If you only need two, you'd grab a duplex instead. For panel feeds and three-wire runs, triplex is what you want, and the 12-gauge size here covers the bulk of the branch circuits on a mid-size boat.\u003c\/p\u003e\n\u003cp\u003eA word on the loads and the run length. Twelve AWG is happy at moderate amperage over a normal run, but voltage drop is real once you get out past 30 or 40 feet on a bigger boat. If you're pushing 20 amps or more down a long stretch on a trawler, do the math and consider stepping up to a heavier gauge instead of fighting a warm cable. For most center consoles and cruisers under 35 feet, 12\/3 is right in the sweet spot for panel feeds and accessory circuits.\u003c\/p\u003e\n\u003cp\u003eThe 250-foot spool is built for a real rewire or a boat with several runs to make. If you're only doing one circuit on a smaller boat, you'll have plenty left over, and that's fine, keep it dry and it'll be there for the next project. Coil it in wide loops when you store it. Tight kinks are the one thing that'll damage a flat cable, and they're a pain to straighten back out.\u003c\/p\u003e\n\u003cp\u003eInstall tips from doing a few of these. Use a chase tube or pull lube through older fiberglass stringers so the jacket doesn't scuff at a hard bend. Keep your bends gentle, a flat cable doesn't love a sharp 90 through a bulkhead. Label your conductors at both ends, because that white leg reads like an AC neutral to the next person who opens the panel, and on a DC circuit that can send someone chasing a phantom reverse-polarity problem. And if the run lives out on a flybridge in full sun, cover it or drop it in conduit. UV works on any jacket over enough seasons.\u003c\/p\u003e\n\u003cp\u003eThis cable is UL listed and ABYC certified, which is the paperwork your surveyor and your insurance want to see. It's the standard for doing marine wiring by the book. Rig it in once, do it right, and you won't think about it again.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eTriplex 3-conductor build: white, green, and black 12-gauge conductors in one flat jacket for AC feeds and three-wire DC runs\u003c\/li\u003e\n  \u003cli\u003eTinned copper strands hold off the green corrosion that eats bare copper in salt air and bilge moisture\u003c\/li\u003e\n  \u003cli\u003e12\/3 AWG gauge handles moderate branch-circuit loads on boats up through the mid-30s\u003c\/li\u003e\n  \u003cli\u003eFlat encasement routes clean against stringers and hull sides without the bulk of three round cables\u003c\/li\u003e\n  \u003cli\u003eStranded conductors stay flexible for pulling through tight chases and around bends\u003c\/li\u003e\n  \u003cli\u003ePVC insulation and outer jacket built to take salt, moisture, and abrasion\u003c\/li\u003e\n  \u003cli\u003e250-foot spool covers a full rewire or several runs on one boat\u003c\/li\u003e\n  \u003cli\u003eUL listed and ABYC certified, the standard your surveyor and insurer expect\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Sea-Dog reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the difference between triplex and duplex cable?\u003c\/summary\u003e\n    \u003cp\u003eTriplex carries three conductors, duplex carries two. This 12\/3 triplex gives you white, green, and black legs in one flat jacket, so it's the pick for AC feeds that need hot, neutral, and ground, or DC runs where you want a third switched or sensing conductor. If you only need two conductors, you'd reach for duplex instead.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy tinned copper instead of bare copper?\u003c\/summary\u003e\n    \u003cp\u003eEvery strand has a thin tin coating that holds off corrosion. Bare copper starts growing green crust within a season in salt air or bilge moisture, which loosens connections and raises voltage drop. Tinned copper keeps your runs tight and reliable for years. It's why this qualifies as real marine cable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use this for AC shore-power wiring?\u003c\/summary\u003e\n    \u003cp\u003eYes. The three conductors line up with hot, neutral, and ground, and the cable is UL listed and ABYC certified. Just confirm the 12-gauge size matches your breaker and load, and label the conductors clearly at the panel.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow long a run can I make with 12 gauge?\u003c\/summary\u003e\n    \u003cp\u003eTwelve AWG is fine for moderate loads over a normal run, but voltage drop climbs once you get past 30 or 40 feet. If you're pushing 20 amps or more over a long stretch on a bigger boat, do the voltage-drop math and step up to a heavier gauge rather than run a warm cable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat do the white, green, and black conductors mean?\u003c\/summary\u003e\n    \u003cp\u003eThey're the three color-coded legs of the cable. On AC that maps to neutral, ground, and hot per the standard color code. On a DC circuit, label both ends, because that white leg reads like an AC neutral to the next person in the panel and can cause confusion.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs 250 feet more than I need for one boat?\u003c\/summary\u003e\n    \u003cp\u003eFor a single circuit on a smaller boat, probably yes, you'll have plenty left over. The 250-foot spool is sized for a full rewire or a boat with several runs to make. Keep the leftover coiled in wide loops and dry, and it'll be ready for the next project.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I run this in the bilge or engine room?\u003c\/summary\u003e\n    \u003cp\u003eYes, that's exactly where the tinned copper earns its keep. Secure it well, keep it clear of moving parts and heat sources, and protect the jacket from chafe at any hard edges. The tinning is what keeps bilge runs from corroding.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it hold up to UV on an exposed run?\u003c\/summary\u003e\n    \u003cp\u003eThe PVC jacket takes normal marine exposure, but constant sun on a flybridge run will degrade any jacket over a few seasons. If the cable lives out in full sun, cover it or run it in conduit to protect it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this cable UL and ABYC certified?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's UL listed and ABYC certified, which is the paperwork a surveyor and your insurer look for. That certification is the standard for doing marine wiring by the book.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eSea-Dog 12\/3 AWG Triplex Marine Cable, 250ft Spool\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSea-Dog\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e8012304\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e035514802482\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCable Type\u003c\/th\u003e\n\u003ctd\u003eTriplex (3-Conductor)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGauge\u003c\/th\u003e\n\u003ctd\u003e12\/3 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConductor\u003c\/th\u003e\n\u003ctd\u003eStranded Tinned Copper\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInsulation\u003c\/th\u003e\n\u003ctd\u003ePVC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCable Shape\u003c\/th\u003e\n\u003ctd\u003eFlat Encasement\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd\u003e250 Foot Spool\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConductor Colors\u003c\/th\u003e\n\u003ctd\u003eWhite \/ Green \/ Black\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eNumber of Conductors\u003c\/th\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCertification\u003c\/th\u003e\n\u003ctd\u003eUL Listed \/ ABYC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the difference between triplex and duplex cable?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Triplex carries three conductors, duplex carries two. This 12\/3 triplex gives you white, green, and black legs in one flat jacket, so it's the pick for AC feeds that need hot, neutral, and ground, or DC runs where you want a third switched or sensing conductor. If you only need two conductors, you'd reach for duplex instead.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why tinned copper instead of bare copper?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Every strand has a thin tin coating that holds off corrosion. Bare copper starts growing green crust within a season in salt air or bilge moisture, which loosens connections and raises voltage drop. Tinned copper keeps your runs tight and reliable for years. It's why this qualifies as real marine cable.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use this for AC shore-power wiring?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The three conductors line up with hot, neutral, and ground, and the cable is UL listed and ABYC certified. Just confirm the 12-gauge size matches your breaker and load, and label the conductors clearly at the panel.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How long a run can I make with 12 gauge?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Twelve AWG is fine for moderate loads over a normal run, but voltage drop climbs once you get past 30 or 40 feet. If you're pushing 20 amps or more over a long stretch on a bigger boat, do the voltage-drop math and step up to a heavier gauge rather than run a warm cable.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What do the white, green, and black conductors mean?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"They're the three color-coded legs of the cable. On AC that maps to neutral, ground, and hot per the standard color code. On a DC circuit, label both ends, because that white leg reads like an AC neutral to the next person in the panel and can cause confusion.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is 250 feet more than I need for one boat?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"For a single circuit on a smaller boat, probably yes, you'll have plenty left over. The 250-foot spool is sized for a full rewire or a boat with several runs to make. Keep the leftover coiled in wide loops and dry, and it'll be ready for the next project.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I run this in the bilge or engine room?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes, that's exactly where the tinned copper earns its keep. Secure it well, keep it clear of moving parts and heat sources, and protect the jacket from chafe at any hard edges. The tinning is what keeps bilge runs from corroding.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it hold up to UV on an exposed run?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The PVC jacket takes normal marine exposure, but constant sun on a flybridge run will degrade any jacket over a few seasons. If the cable lives out in full sun, cover it or run it in conduit to protect it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this cable UL and ABYC certified?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It's UL listed and ABYC certified, which is the paperwork a surveyor and your insurer look for. That certification is the standard for doing marine wiring by the book.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Sea-Dog","offers":[{"title":"Default Title","offer_id":44998978437213,"sku":"2007977","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_2c3bb3fb-05e9-47be-a747-7153a13e62ef.png?v=1788692212","url":"https:\/\/nvnmarine.com\/products\/sea-dog-12-3-awg-triplex-marine-cable-250ft-spool","provider":"NVN Marine","version":"1.0","type":"link"}