Which NEC article pertains to grounding and bonding?

• A. Article 230
• B. Article 310
• C. Article 100
• D. Article 250

Answer: (D)

Grounding and bonding are safety practices that ensure fault currents have a clear path to earth and that all metal parts in a system are at the same electrical potential, reducing shock risk and equipment damage. The NEC lays out a dedicated article that explains how to establish a grounding electrode system (like ground rods and other bonded electrodes), how to run equipment grounding conductors from the panel to outlets and equipment, and how to bond non-current-carrying metal parts (such as water piping, gas piping, and structural metal) to maintain a unified electrical potential. This article is the primary reference for requirements and best practices in grounding and bonding, detailing what’s needed for proper safety and system performance. Other parts of the NEC address different topics, such as service conductors and overcurrent protection, conductor sizing and ampacity, and general definitions, but they do not provide the focused rules for grounding and bonding.