Okay, let's break down this situation with the electrical panel in the closet of a future home office/potential bedroom, considering the 2023 NEC and typical inspection concerns.

Key Considerations & Code References (2023 NEC) 110.26: Spaces About Electrical Equipment

This is the most critical section you're dealing with. It mandates adequate working space around electrical equipment that is likely to require examination, adjustment, servicing, or maintenance while energized.

110.26(A): Working Space

Specifically addresses the depth, width, and height of the working space.

110.26(A)(1): Depth of Working Space

The depth depends on voltage to ground and conditions (Condition 1, 2, or 3). You'll need to determine your specific voltage and conditions. Since it's a residential panel, it's likely 120/240V. Condition 1 applies if there's exposed live parts on one side of the working space and grounded parts or grounded concrete, brick, or tile walls on the other side of the working space. Condition 2 applies if there are exposed live parts on both sides of the working space. Condition 3 applies where live parts are exposed on one side of the working space and insulated on the other side of the working space.

110.26(A)(2): Width of Working Space

This requires a minimum of 30 inches wide (as you mentioned) or the width of the equipment, whichever is greater. The working space must be clear and extend from the floor to the height specified in 110.26(A)(3) (78 inches).

110.26(A)(3): Height of Working Space

The working space must be clear and extend from the floor to a height of 6 1/2 feet (78 inches).

110.26(B): Clear Spaces

Working space required by 110.26 shall not be used for storage.

Definition of "Habitable Room"

While the NEC doesn't define "habitable room" directly, local building codes do. A bedroom, by definition, is a habitable room. Inspectors may flag a room as a bedroom if it has features that make it easily convertible, such as a closet, window (for egress), and potentially even the presence of electrical outlets in a certain configuration. The NEC defines a dwelling unit as as a single unit, providing complete and independent living facilities for one or more persons, including permanent provisions for living, sleeping, cooking, and sanitation.

Analysis of Your Situation1. Working Clearance with Door Open

You state that the 30"W x 36"D x 78"H clearance is met with the closet door open. This is problematic. The working clearance must be maintained at all times, not just when the door is open. An inspector could easily argue that the door being closed obstructs the required working space, even if temporarily.2.

Potential Bedroom Designation

Your concern about the room being considered a bedroom is valid. The presence of a closet is a strong indicator. Even if the room is currently designated as an office on the plans, an inspector might raise concerns about future use, especially if it meets other criteria (window, appropriate electrical outlets, etc.).

Solutions & Recommendations1. Omit the Closet Door

This is the simplest and most likely to be approved solution if it is acceptable from a design perspective. By removing the door, you eliminate the obstruction issue and ensure the working clearance is always maintained. This also makes it less likely the room will be considered a bedroom for permitting purposes.2.

Panel Relocation

This is the most expensive but also the most definitive solution. Moving the panel outside of the room entirely eliminates any potential conflict.3.

Recess the Panel Further

If possible, recessing the panel further into the wall might gain you extra space. However, ensure you still meet the required working clearance dimensions from the front of the enclosure.4.

Revise the Closet Configuration

Redesign the closet so the panel is completely outside the closet enclosure. The panel could be recessed into the wall next to the closet, with the closet being built around it. This requires more significant redesign.5.

Consider a Smaller Panel

If the electrical load allows, you might be able to use a physically smaller panel, but this is likely to be a very costly change at this stage.6.

Consult with the Inspector

Before making any changes, the best course of action is to talk to the local electrical inspector. Explain your situation, your proposed solutions, and get their feedback. They are the ones who will ultimately approve or reject the installation. Getting their input upfront can save you time, money, and frustration.

Important Considerations



Storage

Remember that 110.26(B) prohibits using the working space for storage. Even with the door removed, you can't stack boxes or other items in front of the panel.

Accessibility

The panel must be readily accessible. Having to move furniture or other obstructions to access the panel would be a violation.

Egress

The room MUST have a means of egress regardless of the panel location.

In summary:

Removing the door is your best bet if it's acceptable. Talk to your local inspector before making any major changes. Ensure that the working space is always clear and unobstructed, even with the door in place (if you choose to keep it). Relocating the panel is the ultimate solution, but it's also the most expensive and disruptive. Flag for review