You are correct in your reading of NEC 2020 250.64(E)(1). It specifically refers to bonding requirements for ferrous metal raceways, enclosures, and cable armor containing the grounding electrode conductor (GEC). It does not explicitly require a bonding hub or similar connection for a bare GEC simply passing through an enclosure.Here's a breakdown of why the inspector's requirement is likely incorrect and what might be causing the confusion: NEC 250.64(E)(1) Scope

The purpose of this section is to ensure the integrity of the grounding path when the GEC is run within ferrous metal (like steel conduit). The steel needs to be bonded to the GEC to prevent impedance issues and potential voltage on the metal enclosure under fault conditions. This section is focused on mitigating inductive reactance within the metal enclosure containing the GEC.

Bare Conductor Through an Enclosure

If the bare GEC is simply passing through an enclosure (e.g., entering a disconnect enclosure through a knockout, perhaps protected by a bushing),

and not contained within a ferrous metal raceway inside the enclosure, then 250.64(E)(1) does not apply. Possible Misinterpretations and Justifications for the Inspector's View (But Likely Incorrect)



"Anything Metal Must Be Bonded" Fallacy

Inspectors sometimes have a general inclination to bond anything metal. While bonding is generally good practice, the NEC provides specific rules. Simply being metallic is not enough to require bonding.

Confusing with Other Bonding Requirements

The inspector might be confusing this situation with other bonding requirements, such as:

Bonding metal enclosures that house electrical equipment (250.92 for services, 250.96 general requirements for other enclosures). However, this is about bonding the enclosure itself, not the bare GEC passing through it. Bonding a grounding busbar/terminal bar within the enclosure (250.28, 250.166). The GEC would need to be properly terminated to the grounding bus within the enclosure, but not necessarily with a hub just for passing through. Local Amendments

Always double-check if the local jurisdiction has any amendments to the NEC that are more stringent than the national code. It's possible (but unlikely) that a local amendment requires this.

How to Respond to the Inspector


Respectfully Inquire

Begin by respectfully asking the inspector to clarify the specific code section he believes mandates the bonding hub for the bare GEC. Reiterate that 250.64(E)(1) seems to apply only to GECs within ferrous metal raceways or enclosures. Ask if he is aware of any local amendments influencing this requirement.2.

Present Your Interpretation

Explain your understanding of 250.64(E)(1) and why it doesn't seem to apply in this case since the GEC is bare and simply passing through the enclosure.
3.

Request Further Justification

If the inspector insists, politely request a written code reference or interpretation from his supervisor.4.

Consult with Your Own Expert

If the inspector remains adamant and you still disagree, consider consulting with a licensed electrical engineer or a senior electrician with a thorough understanding of the NEC for a second opinion.5.

Appeal the Decision

If all else fails, most jurisdictions have a process for appealing inspection decisions.

In summary, based on your description and a careful reading of NEC 2020 250.64(E)(1), the inspector's requirement for a bonding hub on a bare GEC simply passing through an enclosure is likely incorrect. Focus on respectful communication and clear explanation of the code to resolve the issue. Flag for review