{"product_id":"national-wire-cable-18-2-marine-wire-100-ft","title":"NATIONAL Wire\u0026Cable 18\/2 Marine Wire, 18-Gauge 100 ft, Tinned Copper Duplex for Boats RVs — Flexible UV-Resistant Jacket","description":"\u003cp\u003e\u003cstrong\u003eNATIONAL Wire\u0026amp;Cable 18\/2 Marine Wire is a 100-foot, 18-gauge two-conductor tinned-copper boat wire built in the USA for reliable, flexible power and lighting runs in marine and mobile applications.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned and manufactured in New York, this 18\/2 duplex marine cable combines fine-stranded copper conductors with a tin coating and a robust outer jacket to resist corrosion, salt spray, and UV exposure. It’s intended for wiring lights, accessories, and low-voltage circuits on boats, RVs, trailers, and automotive projects where flexibility and long-term durability matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this wire resist the harsh marine environment?\u003c\/h3\u003e\n\u003cp\u003eThe conductors are made from many thin copper strands and are tinned to slow corrosion when exposed to moisture and salt. The jacket material is formulated to remain pliable in sun and salt conditions, reducing cracking and brittleness over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTinned copper strands for improved oxidation resistance.\u003c\/li\u003e\n  \u003cli\u003eHeavy-duty, waterproof outer jacket to block saltwater intrusion.\u003c\/li\u003e\n  \u003cli\u003eUV-stable formulation to prevent hardening from sunlight.\u003c\/li\u003e\n  \u003cli\u003eFine strands for flexibility in tight routing and vibration-prone areas.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere can I safely use this 18\/2 duplex cable?\u003c\/h3\u003e\n\u003cp\u003eThis cable is suitable for a wide range of low-voltage wiring tasks including marine lighting, bilge pumps, instrument panels, and auxiliary circuits on boats. It also works well for RVs, campers, trailers, and many automotive applications where a tinned, flexible conductor is preferred.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNavigation and cabin lighting on boats.\u003c\/li\u003e\n  \u003cli\u003eAccessory power runs in RVs and campers.\u003c\/li\u003e\n  \u003cli\u003eTrailer lighting and signal circuits.\u003c\/li\u003e\n  \u003cli\u003eLow-voltage automotive and electrical projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation and performance features matter for installers?\u003c\/h3\u003e\n\u003cp\u003eThe cable’s 18 AWG size provides a balance of current capacity and flexibility for runs up to modest lengths; using correct fusing and proper gauge selection for the circuit is essential. The flexible stranded construction makes routing through bulkheads and conduits easier and reduces wire fatigue from vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e18 AWG two-conductor format for common accessory circuits.\u003c\/li\u003e\n  \u003cli\u003eFine-stranded conductors improve bend radius and handling.\u003c\/li\u003e\n  \u003cli\u003eColor-coded insulation (typical) simplifies polarity identification.\u003c\/li\u003e\n  \u003cli\u003e100-foot length reduces the need for splices on medium runs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does being made in the USA affect quality and support?\u003c\/h3\u003e\n\u003cp\u003eManufacture in New York means production follows domestic quality controls and traceability practices, which can improve consistency and availability. For fleet operators and installers, local production often shortens lead times and helps with sourcing replacement lengths or additional rolls.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDomestic manufacturing standards and oversight.\u003c\/li\u003e\n  \u003cli\u003eConsistent product batches and labeling.\u003c\/li\u003e\n  \u003cli\u003eEasier access to customer support and warranty through a local supply chain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This 18\/2 tinned-copper duplex cable is aimed at boat owners, marine electricians, RV and trailer DIYers, and automotive technicians who need a flexible, corrosion-resistant wire for low-voltage circuits. It’s a practical choice when you want a balance of flexibility, saltwater protection, and trustworthy build quality from a U.S. manufacturer.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is 18\/2 marine wire suitable for bilge pump circuits?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It can be used for small bilge pumps if the pump's current draw matches 18 AWG capacity; confirm pump amperage and use correct fuse sizing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this wire be used in saltwater exposure?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — tinned copper and a waterproof jacket make it appropriate for saltwater environments when installed properly.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NATIONAL Wire\u0026Cable","offers":[{"title":"Default Title","offer_id":48023828005025,"sku":"B0BK1GK9FK","price":100.5,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/6532\/5729\/files\/national-wirecable-18-2-marine-wire-roll-front.jpg?v=1791355401","url":"https:\/\/canadiansporting.ca\/products\/national-wire-cable-18-2-marine-wire-100-ft","provider":"Canadian Sporting","version":"1.0","type":"link"}