How does the NEC define a "structure"?

The definition provided by the National Electrical Code (NEC) characterizes a "structure" as that which is built or constructed, explicitly excluding equipment. This definition encompasses a wide range of physical constructions, including buildings, walls, and other significant frameworks. The exclusion of equipment is crucial; it clarifies that a structure refers only to the physical forms created and not to items that might be housed or utilized within those forms.

This definition provides a solid foundation for understanding how structures relate to electrical installations and requirements within the NEC. The focus on constructed entities allows for the proper application of safety codes, ensuring that installations consider only the built environment.

The other choices, while they may include aspects of structures, do not fit the NEC's precise legal and technical terminology. For instance, defining a structure as "any construction intended for human use" or "temporary or permanent buildings without regard to purpose" broadens the definition in ways that may not align with the specific legal framework established by the NEC. These broader terms could lead to confusion regarding what is regulated or covered under the NEC, making the precise definition vital for compliance and safety.