You are correct, the NEC does not specifically require painted or taped lines on the floor outlining the dedicated equipment space or working space in front of panelboards. You also won't generally find this as a blanket OSHA requirement.Here's a breakdown of why AHJs might require it and where these requirements could stem from: AHJ Discretion & Local Amendments

The most likely reason for this requirement is a

local amendment to the NEC or a locally-enforced regulation. AHJs have the authority to add to or modify the NEC to address specific concerns or conditions within their jurisdiction. They might do this for a variety of reasons: Improved Safety

They may believe marking the space improves safety by making it clear to employees and the public that the area needs to be kept clear.

Accessibility

They may be trying to ensure that the working space is easily identifiable for accessibility purposes.

Enforcement

It simplifies enforcement of clear working space requirements during inspections.

Internal Policies

Some large retailers or property management companies will require marking.

Potential OSHA Interpretation (Less Likely)

While OSHA doesn't specifically require marked lines, they might cite a general duty clause (which requires employers to provide a safe workplace) if an unmarked working space consistently leads to safety issues, obstructions, or accidents. However, this would likely be based on a pattern of problems, not a proactive requirement.

Code Sections to Reference (Even if Not Explicit)

Even without explicit marking requirements, these NEC sections are relevant when discussing working space with an AHJ:

NEC 110.26 (Working Space About Electrical Equipment)

This section details the required depth, width, and height of the working space.

NEC 110.26(B) (Clear Spaces)

This mandates that the working space be kept clear and unobstructed.

NEC 110.26(E) (Dedicated Equipment Space)

Addresses the space directly above and below the equipment.

What to Do


Inquire Directly with the AHJ

The best course of action is to contact the AHJ who made the request and ask for the specific code reference or local regulation that mandates the marking. Politely explain that you haven't found a specific requirement in the NEC or OSHA regulations and you'd like clarification.2.

Review Local Amendments

Carefully examine your local jurisdiction's amendments to the NEC. These are often available online through the AHJ's website or the state's building code authority.3.

Consider Voluntary Compliance (If Appropriate)

If the AHJ doesn't have a strict code requirement but strongly recommends marking the space, you might consider doing so voluntarily. It can demonstrate a commitment to safety and avoid potential issues during future inspections.4.

Document Everything

Keep detailed records of all communication with the AHJ, any applicable local amendments, and any decisions made regarding the marking of working spaces.

In summary, while not a universal requirement, AHJs may require markings around electrical panels due to local amendments, interpretations of general safety requirements, or for ease of enforcement. Contacting the AHJ directly is crucial to understand the specific reason for their request and to ensure compliance. Flag for review