If a panelboard measures wider than how many inches, the workspace in front of it must extend the full width?

The requirement for the workspace in front of a panelboard is primarily based on safety and accessibility standards outlined in the National Electrical Code (NEC). When a panelboard measures wider than 30 inches, it necessitates that the workspace in front of it extends the full width of the panel. This is important to ensure that individuals have adequate space to work safely, perform maintenance, or make necessary adjustments without the risk of electrical hazards.

This full-width workspace enables the inspector or electrician to safely approach the panel; it reduces the likelihood of accidental contact with energized components on either side. Furthermore, it helps facilitate proper ventilation and access for any tools or equipment that may be required during work on the panelboard.

By adhering to the 30-inch requirement, professionals can maintain a consistent standard that enhances workplace safety and efficiency in residential and commercial environments.