Which NEC article covers Nonmetallic-Sheathed Cable (NM) installation?

• A. Article 334
• B. Article 300
• C. Article 430
• D. Article 210

Answer: (A)

Nonmetallic-Sheathed Cable installation has its own dedicated set of rules because this wiring method is used widely in homes and requires specific handling distinct from other conductors. This article defines where NM cable can be used (typically dry, interior locations), how it must be run and secured (supported at regular intervals and within a short distance of boxes to keep it out of harm’s way), and how it must be protected from physical damage (through framing, nail plates, and proper routing). It also covers how NM is terminated into boxes and connected to fittings and devices. The reason this is the best choice is that it directly addresses the installation requirements for NM cable itself, whereas the other topics cover broader wiring methods, motor circuits, or branch circuits, which do not govern NM installation specifics.