Which NEC article covers grounding of electrical systems and bonding of metallic parts?

• A. Article 230
• B. Article 404
• C. Article 250
• D. Article 314

Answer: (C)

Grounding and bonding are essential safety measures in electrical installations, providing a low-impedance path for fault current and ensuring metal parts are at the same electrical potential to prevent shock hazards. The article that specifically covers these topics is the one titled Grounding and Bonding, which lays out how to implement grounding electrodes and conductors, bonding jumpers, and the bonding of enclosures and other metallic parts. This makes it the best match for requirements involving grounding of electrical systems and bonding of metallic parts. The other options address different aspects of NEC scope—one deals with services and feeders, another with switching devices and controls, and another with boxes, conduits, and fittings—so they don’t focus on grounding and bonding.