What is the minimum depth required for access to an energized electrical panelboard?

The minimum depth required for access to an energized electrical panelboard is 30 inches. This requirement is part of the National Electrical Code (NEC) which establishes safety and accessibility standards for electrical installations. The 30-inch requirement ensures that there is adequate space to approach and work on the panel safely without the risk of injury or interference with electrical components.

Having this specific depth allows for proper maneuvering in front of the panel, enabling inspectors, electricians, or maintenance personnel to operate switches or make necessary adjustments while maintaining a safe distance from energized parts. This measurement is crucial in maintaining safety protocols and preventing accidents, particularly in residential or commercial settings where electrical work is performed frequently.

Access depth requirements like this are based on best practices and past experiences in the field, reinforcing the importance of having enough space around electrical panels to facilitate emergency access and routine maintenance effectively.