{"id":11914,"date":"2025-11-27T08:56:19","date_gmt":"2025-11-27T00:56:19","guid":{"rendered":"https:\/\/totcables.com\/?p=11914"},"modified":"2025-11-27T17:19:48","modified_gmt":"2025-11-27T09:19:48","slug":"what-is-romex-wiring-complete-guide-to-nm-b-cable-for-home-electrical","status":"publish","type":"post","link":"https:\/\/totcables.com\/?p=11914","title":{"rendered":"What Is Romex Wiring? Complete Guide to NM-B Cable for Home Electrical"},"content":{"rendered":"

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what is romex wiring

what is romex wiring<\/p><\/div>\\n\\nRomex wiring is a brand name for non-metallic sheathed cable (NM-B) that contains insulated electrical wires bundled together inside a flexible plastic jacket\u2014it’s the most common type of electrical wiring used inside walls and ceilings of residential homes throughout North America.<\/strong> When you open a wall in almost any modern house, the flat, beige or white cable you see running between studs is most likely Romex (or a similar NM-B cable brand).\\n\\nThe term ‘Romex’ has become so ubiquitous that people use it like ‘Kleenex’ for tissues\u2014asking for ‘Romex’ at a hardware store when they actually mean any brand of NM-B cable. This guide explains exactly what Romex wiring is, how it’s constructed, where it can (and cannot) be used, and why it’s become the standard for residential electrical installations.\\n\\nWhether you’re a homeowner trying to understand your electrical system, a DIY enthusiast planning a project, or just curious about what’s behind your walls, this comprehensive guide covers everything you need to know about Romex wiring.\\n\\n<\/p>\n

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What Is Romex? The Technical Definition<\/h2>\n

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Romex vs NM-B Cable<\/h3>\n

\\nRomex<\/strong> = Brand name (manufactured by Southwire Company)\\nNM-B<\/strong> = Technical designation (Non-Metallic sheathed cable, type B)\\n<\/p>\n

ROMEX = BRAND NAME\\n(Like Kleenex is to tissues)\\n\\nNM-B = TECHNICAL NAME\\n(Like facial tissue)\\n\\nAll Romex is NM-B cable\\nNot all NM-B cable is technically 'Romex' brand\\n<\/code><\/pre>\n
\\nWhat ‘NM-B’ means:<\/strong>\\n<\/p>\n