You're right to question the auditor's measurement and interpretation. Here's a breakdown of the situation, how to address it, and things to consider

Understanding the Code (NEC) and Clearance Requirements
NEC 110.26 (Working Space About Electrical Equipment)

This is the key section. It specifies the clearances required around electrical equipment like your panel.

Depth (36 inches)

This is the minimum depth in front of the panel. This is

measured perpendicularly from the face of the panel. Width (30 inches)

This is the minimum width required. The panel has to be at least 30 inches wide.

Height (6 feet 6 inches / 78 inches)

The working space needs to be clear to a height of 6'6" or the height of the equipment, whichever is greater.

The "Cube" Concept

You are right to think in terms of a "cube" or rectangular prism. The working space extends outwards from the panel face, sideways, and upwards.

Obstructions outside this defined space are generally permitted.Addressing the Auditor's Claim1. Politely and Professionally Challenge the Measurement



"Respectfully, I believe the measurement is incorrect. The code requires 36 inches of clear working space perpendicular from the face of the panel. Measuring on a diagonal from the corner is not the proper way to assess compliance." Ask for clarification

"Can you point me to the specific code section that requires a diagonal measurement?" (There isn't one that I am aware of).

Document the measurement process

Take your own pictures/videos showing you measuring the perpendicular distance from the panel to the washer. This helps create a visual record.2.

Illustrate the Correct Measurement

Use a level and a measuring tape to show the perpendicular distance. Make sure the level is plumb (vertical) and the measuring tape is running straight out from the panel. If possible, use a laser measuring device. This provides a very clear and accurate measurement and reduces room for argument.3.

Refer to the Code (with Specificity)

Don't just say "the code says..." Say: "According to NEC 110.26, the required depth is measured perpendicular to the face of the equipment. The height of the working space is 6'6"..." Bring a copy of the relevant sections of the NEC code (or a printout from a reputable online source).4.

Review "Dedicated Electrical Space"

The NEC also has requirements for "dedicated electrical space" above and below the panel. This space is usually reserved for raceways, cables, and other electrical equipment associated with the panel.

Importantly

The dedicated electrical space usually ends 6 inches above the panel!5.

Consider Local Amendments

While the NEC is widely adopted, some jurisdictions have amendments or local interpretations. Verify if there are any local regulations that might affect the situation. Contacting a local electrical inspector can provide clarity.

Important Considerations



Safety is Paramount

Even if technically compliant, consider whether the washer's proximity creates a genuine safety hazard. Could it be accidentally bumped? Could water or chemicals splash onto the panel? If so, relocating the washer might be a good idea, even if not strictly required.

Employee Access

Is the working space readily accessible? If the washer makes it awkward or difficult to access the panel, that's a practical concern.

Documentation

Keep a record of all communication with the auditor, including dates, times, and key points discussed. Save your photographs and measurements.*

Escalation (if needed)

If you can't resolve the issue with the auditor, consider escalating to their supervisor or management. Prepare a clear and concise summary of your position, backed by the NEC code.

Example Scenario to Help Illustrate Your Position

"Imagine we draw a box that extends 36 inches straight out from the panel, 15 inches to the left and 15 inches to the right (total 30 inches), and up to 6 feet 6 inches high. The washer is outside that box. The code is meant to ensure there's enough room for an electrician to safely work on the panel without being obstructed. Since the washer is outside that working space, it shouldn't be a code violation."

Key Takeaway:

Your understanding of the NEC clearance requirements is likely correct. The auditor appears to be misinterpreting the measurement. By politely and professionally presenting your case with accurate measurements and code references, you should be able to resolve the issue. Always prioritize safety, but don't be afraid to challenge an incorrect interpretation of the code. Flag for review