{"product_id":"12-3-nm-b-copper-building-wire","title":"12\/3 NM-B Copper Building Wire with Ground, 600V (Purple Jacket)","description":"\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003eEngineered for elite efficiency in residential and commercial interiors, this 12 AWG NM-B Copper Building Wire with a distinctive Purple Jacket is designed for high-performance 20-amp branch circuits. This cable provides a premium, labor-saving solution for interior wiring, offering the superior conductivity of annealed copper in a format that stands out on the job site for rapid identification and organized circuit management.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch4 data-path-to-node=\"4\"\u003eWhy Choose 12\/3 NM-B Purple Building Wire?\u003c\/h4\u003e\n\u003cp data-path-to-node=\"5\"\u003eThis 2-conductor (plus ground) configuration is a fundamental requirement for modern high-density electrical loads. The \u003cb data-path-to-node=\"5\" data-index-in-node=\"120\"\u003eType NM-B\u003c\/b\u003e designation allows for rapid installation through wood-frame structures without the need for conduit. The unique purple color is often utilized by contractors to distinguish specific circuit types (such as AFCI\/GFCI dedicated lines or lighting controls) from standard 20-amp yellow-jacketed runs.\u003c\/p\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,0,0\"\u003e\u003cb data-path-to-node=\"6,0,0\" data-index-in-node=\"0\"\u003eUnique Purple Color Coding:\u003c\/b\u003e The purple PVC jacket provides immediate visual differentiation on a crowded job site, helping crews and inspectors identify specific circuits or proprietary Priority-Plex® installations instantly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eMaximum Copper Conductivity:\u003c\/b\u003e Soft-drawn copper conductors ensure the lowest electrical resistance and most reliable power delivery for sensitive electronics and high-use outlets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eEnhanced Pulling Performance:\u003c\/b\u003e The outer PVC jacket is formulated with a slick finish to glide through bored studs and tight corners, reducing the physical effort required during rough-in.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,3,0\"\u003e\u003cb data-path-to-node=\"6,3,0\" data-index-in-node=\"0\"\u003eIndustrial-Grade Insulation:\u003c\/b\u003e Each conductor is shielded with heat-resistant PVC and a tough nylon topcoat (THHN\/THWN-2), providing an extra layer of defense against abrasion and nicks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-path-to-node=\"7\"\u003eTechnical Specifications: 12\/3 NM-B Copper (Purple)\u003c\/h4\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003eConductor Size:\u003c\/b\u003e 12 AWG\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eNumber of Conductors:\u003c\/b\u003e 2 (plus Ground)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003eColor Code:\u003c\/b\u003e Black, White, Bare Ground\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eJacket Color:\u003c\/b\u003e Purple\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eAmpacity:\u003c\/b\u003e 20 Amps at 60°C (NEC Table 310.16)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,5,0\"\u003e\u003cb data-path-to-node=\"8,5,0\" data-index-in-node=\"0\"\u003eVoltage:\u003c\/b\u003e 600V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,6,0\"\u003e\u003cb data-path-to-node=\"8,6,0\" data-index-in-node=\"0\"\u003eInsulation:\u003c\/b\u003e Polyvinyl Chloride (PVC) with Nylon Covering (Type THHN)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,7,0\"\u003e\u003cb data-path-to-node=\"8,7,0\" data-index-in-node=\"0\"\u003eMax Temp:\u003c\/b\u003e 90°C (Dry locations only)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,8,0\"\u003e\u003cb data-path-to-node=\"8,8,0\" data-index-in-node=\"0\"\u003eConductor Material:\u003c\/b\u003e Annealed (Soft) Copper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,9,0\"\u003e\u003cb data-path-to-node=\"8,9,0\" data-index-in-node=\"0\"\u003eStandards:\u003c\/b\u003e UL Standard 83, UL Standard 719, ASTM B-3, B-8, Federal Spec A-A-59544\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-path-to-node=\"9\"\u003eCommon Applications\u003c\/h4\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eSpecialized Kitchen Circuits:\u003c\/b\u003e Ideal for dedicated GFCI-protected circuits serving high-wattage countertop appliances and food prep areas.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eHome Automation \u0026amp; Lighting Controls:\u003c\/b\u003e Often used to differentiate \"smart home\" or control circuits from standard general-purpose power.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003eDedicated Home Office Power:\u003c\/b\u003e The standard choice for computer workstations and high-end home theater systems that require a dedicated 20-amp feed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eBathroom \u0026amp; Laundry Receptacles:\u003c\/b\u003e A reliable solution for wiring high-wattage personal care tools and modern high-efficiency washing machines.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"11\"\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003eTechnical Note:\u003c\/b\u003e All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyer’s responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes. NM-B is for dry, indoor use only.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003e \u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003e\u003ci data-path-to-node=\"14\" data-index-in-node=\"0\"\u003e*All values are nominal and subject to correction. Ampacity is based on the National Electrical Code (NEC) 60°C column for NM-B cable, regardless of the conductor temperature rating.\u003c\/i\u003e\u003c\/p\u003e","brand":"Wire America","offers":[{"title":"250 ft. Spool","offer_id":53372884779322,"sku":"NMB12-3-250","price":313.0,"currency_code":"USD","in_stock":true},{"title":"500 ft. Spool","offer_id":53372884812090,"sku":"NMB12-3-500","price":623.0,"currency_code":"USD","in_stock":true},{"title":"1000 ft. Spool","offer_id":53372884844858,"sku":"NMB12-3-1K","price":1239.0,"currency_code":"USD","in_stock":true},{"title":"2500 ft. Spool","offer_id":53372884877626,"sku":"NMB12-3-2500","price":3080.0,"currency_code":"USD","in_stock":true},{"title":"By the Foot","offer_id":53372884910394,"sku":"NMB12-3-FT","price":1.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/0234\/9114\/files\/12-3-nm-b-purple-jacket-specialty-copper-romex.jpg?v=1777311741","url":"https:\/\/www.wireamerica.com\/products\/12-3-nm-b-copper-building-wire","provider":"Wire America ","version":"1.0","type":"link"}