{"product_id":"4-3-nm-b-copper-building-wire","title":"4\/3 NM-B Copper Building Wire with Ground, 600V (Black Jacket)","description":"\u003cp data-path-to-node=\"1\"\u003e\u003cb data-path-to-node=\"1\" data-index-in-node=\"0\"\u003eSpecifically optimized for heavy-amperage residential branch circuits, this 4 AWG NM-B Copper Building Wire provides the heavy-duty power delivery required for modern high-performance homes. Featuring two insulated copper conductors and a dedicated bare ground wire, this assembly is engineered for interior dry-location wiring where high conductivity and long-term reliability are paramount.\u003c\/b\u003e\u003c\/p\u003e\n\u003ch4 data-path-to-node=\"2\"\u003eWhy Choose 4\/3 NM-B Copper Building Wire?\u003c\/h4\u003e\n\u003cp data-path-to-node=\"3\"\u003eThis 2-conductor (with ground) cable is a staple for professional contractors handling high-load appliances. The \u003cb data-path-to-node=\"3\" data-index-in-node=\"113\"\u003eType NM-B\u003c\/b\u003e construction allows for a direct pull through wooden framing members without the added labor or cost of conduit, while the solid copper core ensures minimal voltage drop over long residential runs.\u003c\/p\u003e\n\u003cul data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-path-to-node=\"4,0,0\" data-index-in-node=\"0\"\u003eHigh-Efficiency Copper Core:\u003c\/b\u003e Annealed (soft) copper conductors offer the superior electrical performance and flexibility needed for tight residential installs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-path-to-node=\"4,1,0\" data-index-in-node=\"0\"\u003eLow-Friction Pulling Jacket:\u003c\/b\u003e The slick, black PVC outer jacket is designed to slide easily through bored holes in studs and joists, reducing physical strain on the installer.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-path-to-node=\"4,2,0\" data-index-in-node=\"0\"\u003eIntegrated Safety Ground:\u003c\/b\u003e Includes a full-sized bare copper grounding conductor to ensure immediate fault current paths and total code compliance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,3,0\"\u003e\u003cb data-path-to-node=\"4,3,0\" data-index-in-node=\"0\"\u003eDual-Layer Insulation:\u003c\/b\u003e Individual conductors are protected by heat-resistant PVC and a slick nylon topcoat (THHN\/THWN-2), providing enhanced protection against abrasion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-path-to-node=\"5\"\u003eTechnical Specifications: 4\/3 NM-B Copper\u003c\/h4\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\"\u003eConductor Size:\u003c\/b\u003e 4 AWG\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\"\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=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" 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=\"6,3,0\"\u003e\u003cb data-path-to-node=\"6,3,0\" data-index-in-node=\"0\"\u003eAmpacity:\u003c\/b\u003e 70 Amps at 60°C (NEC Table 310.16)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,4,0\"\u003e\u003cb data-path-to-node=\"6,4,0\" 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=\"6,5,0\"\u003e\u003cb data-path-to-node=\"6,5,0\" 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=\"6,6,0\"\u003e\u003cb data-path-to-node=\"6,6,0\" 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=\"6,7,0\"\u003e\u003cb data-path-to-node=\"6,7,0\" 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=\"6,8,0\"\u003e\u003cb data-path-to-node=\"6,8,0\" 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=\"7\"\u003eCommon Applications\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\"\u003eResidential Electric Ranges:\u003c\/b\u003e The industry standard for wiring dedicated circuits for high-wattage kitchen ranges and built-in ovens.\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\"\u003eHVAC Condenser Units:\u003c\/b\u003e Ideal for supplying power to large central air conditioning units and residential heat pump systems.\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\"\u003eHome Workshop Sub-Panels:\u003c\/b\u003e Frequently used to feed secondary 60A or 70A panels in garages or detached sheds.\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\"\u003eElectric Vehicle (EV) Charging:\u003c\/b\u003e A preferred solution for Level 2 EVSE installations that require sustained high-amperage delivery in a residential setting.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-path-to-node=\"9\"\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" 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=\"11\"\u003e \u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003ci data-path-to-node=\"12\" 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":53372886712634,"sku":"NMB4-3-250","price":3428.0,"currency_code":"USD","in_stock":true},{"title":"500 ft. Spool","offer_id":53372886745402,"sku":"NMB4-3-500","price":6821.0,"currency_code":"USD","in_stock":true},{"title":"1000 ft. Spool","offer_id":53372886778170,"sku":"NMB4-3-1K","price":13572.0,"currency_code":"USD","in_stock":true},{"title":"2500 ft. Spool","offer_id":53372886810938,"sku":"NMB4-3-2500","price":33756.0,"currency_code":"USD","in_stock":true},{"title":"By the Foot","offer_id":53372886843706,"sku":"NMB4-3-FT","price":13.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0969\/0234\/9114\/files\/4-3-nm-b-black-jacket-copper-romex-cable.jpg?v=1777311455","url":"https:\/\/www.wireamerica.com\/products\/4-3-nm-b-copper-building-wire","provider":"Wire America ","version":"1.0","type":"link"}