Which article outlines the requirements for electrical installations?

The accurate choice here is Article 110, which covers general requirements for electrical installations, including the necessary conditions for safe installations of electrical equipment. This article outlines fundamental principles related to the installation, including accessibility, working space, and appropriate equipment conditions to ensure safety and performance.

Article 110 serves as an overarching guideline that applies to most electrical installations, detailing how installations should be conducted to promote safety and efficiency. This includes necessary practices for grounding, bonding, and ensuring equipment is installed in adherence to the manufacturer's instructions and local codes.

The other articles mentioned each focus on more specific aspects of electrical installations. Article 200 typically deals with service and feeder conductors, whereas Article 210 addresses branch circuits and their requirements. Article 250 focuses on grounding and bonding practices. While all these articles play vital roles in the comprehensive framework of electrical installations, Article 110 is foundational and covers the general requirements necessary for any electrical installation.