Which NEC article covers grounding and bonding?

• A. Article 430.
• B. Article 300.
• C. Article 200.
• D. Article 250.

Answer: (D)

Grounding and bonding are safety steps that ensure fault currents have a low-impedance path and that all metal parts of the electrical system stay at the same electrical potential. The NEC addresses these concepts together in one article, which outlines how to establish the grounding electrode system and how to bond equipment and non-current-carrying metal parts (like enclosures, water piping, and other conductive items) so they’re all connected to the same reference point. This article also defines the grounding conductor that runs from the service to the grounding electrodes (rods, plates, etc.) and the bonding jumpers that tie various metal parts to that system.

That’s why this article is the best match for grounding and bonding. Other articles focus on different areas: one deals with motors and controllers, another with general wiring methods, and another with identification of conductors. None of those centers on the safety and connection requirements for grounding and bonding the electrical system.