According to the NEC®, which section states that no overcurrent device shall be connected in series with any conductor that is intentionally grounded?

The National Electrical Code (NEC) specifies that no overcurrent device should be connected in series with any conductor that is intentionally grounded, which is outlined in section 240.22. The reasoning behind this rule is rooted in safety; connecting an overcurrent device in series with a grounded conductor could lead to unwanted fault conditions or hazardous situations where the grounding system may not function as intended. By prohibiting such connections, the NEC aims to ensure that grounding conductors maintain their integrity and provide necessary fault protection without interference from overcurrent devices.

Section 240.18 deals with overcurrent protection, but it does not specifically address the interaction between grounded conductors and overcurrent devices. Section 250.18 refers to grounding conductors but focuses on their installation and maintenance rather than overcurrent devices. Section 250.22 outlines grounding and bonding requirements in a slightly different context. Thus, section 240.22 is specifically the correct reference for stating that no overcurrent device may be connected in series with intentionally grounded conductors.