You've hit a common point of confusion, and you're correct in reading 625.43. Let's break it down and address the likely sources of differing interpretations

Your Understanding is Correct

Based on NEC 2023 (and previous editions), 625.43 only mandates a lockable disconnect for EVSE meeting either of these conditions: Rated more than 60 amperes Rated more than 150 volts to ground

If the EVSE is rated both 60 amps or less and 150 volts or less to ground, 625.43 does NOT require a lockable disconnect. A simple, readily accessible disconnect switch or breaker is sufficient.

Why the Differing Interpretations?

Here are the most likely reasons for the inspectors' differing interpretations:1. Misunderstanding of 625.43

Some inspectors may simply misinterpret the wording of 625.43, focusing on the "disconnecting means shall be provided" part without fully considering the amperage and voltage thresholds that trigger the lockable requirement. They might assume all EVSE need a lockable disconnect.2.

Local Amendments/Regulations

This is the most common reason. Many jurisdictions adopt the NEC with local amendments that add or modify requirements. Some localities have amended the NEC to require a lockable disconnect for all EVSE, regardless of amperage or voltage. This is often done for added safety or to align with local utility policies.3.

Interpretation of "Readily Accessible"

Even if they agree with the amperage/voltage thresholds, inspectors might disagree on what constitutes "readily accessible." If the disconnect is not considered readily accessible, they might push for a lockable disconnect near the EVSE as a workaround.4.

Concerns about Serviceability/Safety

An inspector might be concerned about future servicing of the EVSE. They might want to ensure that it can be de-energized and locked out to prevent accidental re-energization during maintenance, even if the code doesn't strictly require it.5.

General Safety Considerations

Some inspectors may simply be erring on the side of caution and prioritizing safety above strict code interpretation. They may feel that a lockable disconnect is always a good practice for EVSE, regardless of the code requirements.

What to Do1. Verify the Local Amendments

This is the MOST important step. Contact your local electrical authority (building department or equivalent) and ask specifically if they have any local amendments to NEC Article 625 that affect EVSE disconnect requirements. Get it in writing if possible.2.

Reference the Code

Politely and respectfully point out the specific wording of NEC 625.43 to the inspector. Make sure they understand that your installation meets the code requirements.
3.

Document Everything

Keep detailed records of all communication with the inspectors, including dates, times, and the specific points of contention. This documentation can be helpful if you need to appeal a decision.4.

Escalate If Necessary

If you've confirmed there are no local amendments, and the inspector continues to insist on a lockable disconnect despite your code compliance, you may need to escalate the issue to their supervisor or the head of the electrical department.5.

Consider Voluntary Compliance

If the inspector is adamant and the cost isn't prohibitive, sometimes it's easier to just comply and install the lockable disconnect, even if it's not strictly required by code. It avoids delays and potential conflicts.6.

Explain Your Rationale

Communicate your rationale for choosing the equipment and installation methods you've used. Explain how your chosen setup complies with the code and ensures safety.

In summary: Your understanding of NEC 625.43 is correct. However, you MUST verify the existence of any local amendments that may override the NEC's baseline requirements. Clear communication and documentation are key to resolving these types of disagreements with inspectors. Good luck! Flag for review