No, the inspector's interpretation of NEC 430.112 seems incorrect, or at least requires more context. Here's a breakdown of why and the relevant code sections

NEC 430.112: Location
"One or more disconnecting means shall be located in sight from the motor location and the driven machinery location."Key Considerations


Purpose of 430.112

The primary purpose of this section is worker safety during maintenance. It's to ensure a qualified person working on a motor or its driven machinery has a readily accessible disconnect to kill power and prevent accidental startup.2.

"In Sight From"

This is a crucial phrase. NEC Article 100 defines "In Sight From (Within Sight From, Within Sight)" as: "Where specified, this means visible and not more than 15 m (50 ft) distant from one another."3.

"One or More"

Note that the rule allows for "One or More" disconnecting means. It doesn't require a separate disconnect for every motor.4.

Multiple Motors

The important factor is whether the single disconnecting means is in sight of

all the motors and their driven machinery. If your panel's main disconnect satisfies the "in sight from" requirement for all motors and driven machinery, you are likely in compliance.

Why the Inspector May Be Incorrect (or Missing Context)



Misinterpretation of "Same Circuit"

While 430.112 is related to disconnecting, the requirement isn't solely about multiple motors on a single circuit. The main concern is the proximity of the disconnect to the motor and its driven machinery, regardless of the circuit configuration (within reasonable limits).

Forgotten Exception

There are exceptions to the general requirement for a disconnect in sight. For example, some of the exceptions in 430.109, may apply, such as motors operated by qualified people, with a written safety procedure in place.

Local Amendments

Check if your local jurisdiction has amended the NEC, adding stricter requirements. This is rare, but possible.

Misunderstanding of Installation

Perhaps the inspector doesn't fully understand the layout. If any of the motors or their driven machinery are not within sight (50 ft and visible) of the panel's main disconnect, then that motor would require an additional disconnect.

Driven Machinery

If the driven machinery is in a different location from the motor, and neither is within sight, then either the motor disconnect or a disconnect at the machinery location is generally required.

What You Should Do


Clarify with the Inspector

Politely ask the inspector to clarify their interpretation. Specifically, ask why they believe 430.112 requires a separate disconnect for each motor given that the panel disconnect is in sight of all motors and driven machinery. Reference your understanding of 430.112 and the "in sight from" definition in Article 100.
2.

Provide Documentation

Provide a clear drawing or layout showing the location of the control panel, each motor, and the driven machinery. Highlight the distances to demonstrate that everything is within the "in sight from" range.3.

Check for Local Amendments

Confirm if your local jurisdiction has made any amendments to NEC 430.112 or related sections.
4.

Escalate (If Necessary)

If you still disagree with the inspector's interpretation after clarification, you may need to escalate to a senior inspector or the AHJ (Authority Having Jurisdiction) for a ruling.5.

Safety Justification

Finally, consider writing a safety justification outlining how using the panel's main disconnect provides an equivalent (or better) level of safety for maintenance personnel. Sometimes, a documented safety plan can address the inspector's concerns.

In Summary:

Based on your description, and assuming all motors and their driven machinery are within sight of the panel's main disconnect, the inspector's interpretation seems incorrect. You should engage in a respectful and informative discussion with the inspector to clarify their reasoning and present your case. Documentation and a clear understanding of the code will be crucial. Flag for review