Which structures require grounding according to Article 250?

Grounding is a critical safety measure mandated by Article 250 of the National Electrical Code (NEC). The requirement for grounding applies to all structures that contain electrical equipment or wiring, which includes residential, commercial, and industrial buildings. This ensures the safety of both individuals and equipment by providing a path for fault currents and minimizing the risk of electric shock or fire hazards.

The rationale behind requiring grounding for all structures with electrical equipment is based on the recognition that any electrical system can potentially develop faults, and grounding serves to mitigate those risks. It enhances the stability and reliability of electrical systems by helping to control voltages that may arise during faults and protecting sensitive electronic equipment from surges.

Focusing on specific categories, such as solely residential or industrial structures, or only those with direct utility connections, does not encompass the full range of scenarios where grounding is essential. Grounding is a universal safety requirement for all buildings equipped with electrical systems, ensuring comprehensive protection standards across diverse environments.