Which article outlines requirements for outside branch circuits?

The correct choice identifies Article 225, which specifically addresses the requirements for outside branch circuits. This article outlines critical regulations regarding the installation and protection of circuits that extend beyond a building's exterior, which is crucial for ensuring safety and compliance with electrical standards.

Understanding this article is important for electricians as it includes provisions related to the location of these circuits, conductor sizing, grounding methods, and the type of protection required to mitigate hazards, particularly in outdoor environments where exposure to the elements is a factor.

Each article in the National Electrical Code (NEC) deals with specific sections of electrical installation, but Article 225 focuses uniquely on the considerations necessary for circuits that are utilized in an exterior capacity. This includes guidance on everything from the physical installation to the necessary materials and safety precautions that must be taken to ensure that these external branch circuits operate securely and efficiently.