Which NEC article covers general wiring methods and installation requirements for low-voltage circuits?

• A. Article 310
• B. Article 240
• C. Article 300
• D. Article 200

Answer: (C)

General wiring methods and installation requirements for circuits are set by the article that establishes the baseline rules for how conductors are run, supported, protected, and placed in enclosures and raceways. This article covers the broad, universal requirements that apply to most wiring scenarios, including low‑voltage work, unless a more specific low‑voltage article applies.

Knowing this, you apply these general wiring rules first, then bring in any specialized low‑voltage articles if the conductors or circuits fall under a specific category (like Class 2 or Class 3, or communications circuits). The other topics focus on separate aspects—one on conductor sizing and ampacity, another on protecting circuits from overcurrent, and another on terminology—so they don’t address the overarching installation methods the question is asking about.