{"product_id":"12-3-nm-b-wire-250-coil","title":"12-3 NM-B WIRE 250' COIL","description":"\u003cp data-start=\"0\" data-end=\"50\"\u003e\u003cstrong data-start=\"0\" data-end=\"50\"\u003e12-3 NM-B WIRE 250' COIL – Product Description\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1idzntm\" data-start=\"52\" data-end=\"69\"\u003e🔌 What it is\u003c\/h3\u003e\n\u003cp data-start=\"70\" data-end=\"207\"\u003eA \u003cstrong data-start=\"72\" data-end=\"137\"\u003e250-foot coil of 12\/3 NM-B (Romex-style) copper building wire\u003c\/strong\u003e used for 120V\/240V residential circuits requiring an extra conductor.\u003c\/p\u003e\n\u003chr data-start=\"209\" data-end=\"212\"\u003e\n\u003ch3 data-section-id=\"9f6580\" data-start=\"214\" data-end=\"245\"\u003e🧾 What the shorthand means\u003c\/h3\u003e\n\u003cul data-start=\"246\" data-end=\"529\"\u003e\n\u003cli data-section-id=\"1mwq859\" data-start=\"246\" data-end=\"396\"\u003e\n\u003cstrong data-start=\"248\" data-end=\"256\"\u003e12-3\u003c\/strong\u003e → wire configuration:\n\u003cul data-start=\"281\" data-end=\"396\"\u003e\n\u003cli data-section-id=\"1xz4hd7\" data-start=\"281\" data-end=\"311\"\u003e\u003cstrong data-start=\"283\" data-end=\"311\"\u003e12 AWG copper conductors\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"15ioekm\" data-start=\"314\" data-end=\"351\"\u003e\u003cstrong data-start=\"316\" data-end=\"351\"\u003e3 insulated conductors + ground\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"4ziepn\" data-start=\"354\" data-end=\"396\"\u003e(black, red, white + bare copper ground)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1yd6juy\" data-start=\"397\" data-end=\"466\"\u003e\n\u003cstrong data-start=\"399\" data-end=\"407\"\u003eNM-B\u003c\/strong\u003e → Non-Metallic Building cable (indoor PVC-sheathed wiring)\u003c\/li\u003e\n\u003cli data-section-id=\"ovyod0\" data-start=\"467\" data-end=\"496\"\u003e\n\u003cstrong data-start=\"469\" data-end=\"477\"\u003eWIRE\u003c\/strong\u003e → electrical cable\u003c\/li\u003e\n\u003cli data-section-id=\"1o2ug4\" data-start=\"497\" data-end=\"529\"\u003e\n\u003cstrong data-start=\"499\" data-end=\"512\"\u003e250' COIL\u003c\/strong\u003e → 250-foot spool\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"531\" data-end=\"534\"\u003e\n\u003ch3 data-section-id=\"sb3ja\" data-start=\"536\" data-end=\"560\"\u003e⚡ What it’s used for\u003c\/h3\u003e\n\u003cp data-start=\"561\" data-end=\"641\"\u003e\u003cstrong data-start=\"561\" data-end=\"631\"\u003e12\/3 NM-B is used for 20-amp circuits that need an extra conductor\u003c\/strong\u003e, such as:\u003c\/p\u003e\n\u003cul data-start=\"643\" data-end=\"858\"\u003e\n\u003cli data-section-id=\"nqspb1\" data-start=\"643\" data-end=\"687\"\u003eThree-way and four-way lighting circuits\u003c\/li\u003e\n\u003cli data-section-id=\"nlii95\" data-start=\"688\" data-end=\"736\"\u003eCeiling fans with separate light\/fan control\u003c\/li\u003e\n\u003cli data-section-id=\"d3yqh0\" data-start=\"737\" data-end=\"766\"\u003eSplit receptacle circuits\u003c\/li\u003e\n\u003cli data-section-id=\"1q26ein\" data-start=\"767\" data-end=\"815\"\u003eMulti-wire branch circuits (where permitted)\u003c\/li\u003e\n\u003cli data-section-id=\"1djw2n4\" data-start=\"816\" data-end=\"858\"\u003eSome 240V circuits requiring a neutral\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"860\" data-end=\"863\"\u003e\n\u003ch3 data-section-id=\"vmfmf2\" data-start=\"865\" data-end=\"898\"\u003e🔥 Electrical characteristics\u003c\/h3\u003e\n\u003cul data-start=\"899\" data-end=\"1043\"\u003e\n\u003cli data-section-id=\"etsuzt\" data-start=\"899\" data-end=\"940\"\u003eTypically used on \u003cstrong data-start=\"919\" data-end=\"938\"\u003e20-amp breakers\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"10dhpox\" data-start=\"941\" data-end=\"984\"\u003eRated for \u003cstrong data-start=\"953\" data-end=\"982\"\u003eindoor dry locations only\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"brnypa\" data-start=\"985\" data-end=\"1043\"\u003eCopper conductors with PVC insulation and outer jacket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1045\" data-end=\"1048\"\u003e\n\u003ch3 data-section-id=\"1p3o9gl\" data-start=\"1050\" data-end=\"1075\"\u003e🧠 Simple explanation\u003c\/h3\u003e\n\u003cblockquote data-start=\"1076\" data-end=\"1210\"\u003e\n\u003cp data-start=\"1078\" data-end=\"1210\"\u003eThis is a \u003cstrong data-start=\"1088\" data-end=\"1210\"\u003e250-foot roll of 20-amp household wire used when you need an extra wire for switch control or mixed circuit functions.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"1212\" data-end=\"1215\"\u003e\n\u003ch3 data-section-id=\"1ioqiu6\" data-start=\"1217\" data-end=\"1236\"\u003e🔧 Key takeaway\u003c\/h3\u003e\n\u003cul data-start=\"1237\" data-end=\"1400\"\u003e\n\u003cli data-section-id=\"1k5jaie\" data-start=\"1237\" data-end=\"1277\"\u003e\u003cstrong data-start=\"1239\" data-end=\"1277\"\u003e12\/3 = two hots + neutral + ground\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-section-id=\"1p1uful\" data-start=\"1278\" data-end=\"1342\"\u003eUsed for \u003cstrong data-start=\"1289\" data-end=\"1342\"\u003eswitching systems and some mixed-voltage circuits\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"owsu2w\" data-start=\"1343\" data-end=\"1400\"\u003eHeavier-duty than 14 AWG wiring (supports 20A circuits)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMPERIUM CABLE LLC","offers":[{"title":"Default Title","offer_id":52411466907937,"sku":"NM-B-12-3-C250","price":541.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/1905\/1041\/files\/shopping_21_ba4d9d6d-967e-4063-b575-a434155d11c8.webp?v=1777574868","url":"https:\/\/standardvmi.com\/products\/12-3-nm-b-wire-250-coil","provider":"Standard Plumbing Supply","version":"1.0","type":"link"}