Which National Electric Code (NEC) Chapter covers fire stopping requirements?

The correct choice is Chapter 3 of the National Electric Code (NEC), which covers requirements related to the general installation of wiring methods and materials. This chapter encompasses provisions for ensuring that electrical installations minimize fire hazards, including fire stopping requirements that manage the spread of fire through electrical penetrations in walls, floors, and ceilings.

Fire stopping is critical because it helps maintain the integrity of fire-resistance-rated assemblies, preventing flames, smoke, and toxic gases from spreading to other areas during a fire event. The focus in this chapter is on proper materials and methods to effectively seal areas where cables and conduits penetrate structural elements, adhering to safety standards that protect both life and property.

The other chapters specified do not address fire stopping directly. Chapter 1 includes general regulations and definitions, Chapter 2 deals with circuit conductors and their installation, while Chapter 4 focuses on equipment and branch circuits, none of which are primarily centered on fire stopping practices. Therefore, understanding the role of Chapter 3 is crucial for complying with safety standards in electrical installations.