Every electrical panel, breaker box, meter base, and service disconnect needs a clear working zone in front of it so that someone can safely operate the equipment or respond to an emergency. 26 spells out three dimensions for this space. Electrical clearances are the minimum separation distances the National Electrical Code (NEC) requires between wiring, panels, overhead conductors. other types of load calculations can be found in the NEC. Working space: The front clearance, side clearance, and height clearance requirements for electrical equipment that provide a safe area for maintenance, inspections, and other work. Those systems legally required and classed as emergency by municipal, state, federal or other codes, or by any governmental ag ncy having jurisdiction. Classification of Emergency and.
[PDF Version]