What height must the working space be for safe access around electrical equipment?

The requirement for the height of the working space around electrical equipment is that it must be a minimum of 6½ feet. This height is specified to ensure that individuals can work safely and comfortably around electrical installations without the risk of contacting overhead components or fixtures. The height allows for adequate headroom, which is particularly important in environments where individuals may be using tools, performing maintenance, or conducting inspections.

Choosing a height of 6½ feet acknowledges the need for proper clearance combined with the average height of most individuals, thereby reducing the risk of accidents or injuries that could arise from working in cramped or inadequately designed spaces. The provision is part of the NEC's focus on promoting safe working conditions around energized equipment.