Dedicated equipment space is the space equal to the width and depth of the equipment (the envelope of the equipment), extending from the floor to a height of 6 feet above the equipment or to the structural ceiling, whichever is lower. In this guide, we'll break down everything you need to know to install a distribution box correctly and confidently. Choose the right box based on environment (indoor/outdoor), load capacity, and durability. Check for proper IP/NEMA ratings and material quality. Ensure safe placement: install in. For distribution boxes that handle only lighting circuits or small power loads, if the incoming wire size is less than 10 square millimeters and the number of circuit switches is fewer than 20, the width of the box should be calculated by summing the width of the switches and adding an additional. Dedicated equipment space is for the equipment so that there is ample room for installing conduits, cables, cable trays and related wiring methods. Some of the requirements and ratings include: voltage, continuous current, wire range (load and line side). Adequate clearances for personnel working on energized equipment to escape should a problem occur The National Electrical CodeT (NEC) addresses the minimum requirements to meet these needs. 26 (A)] and dedicated space to provide access to, and protection of, equipment [110. Equipment that may need examination, adjustment, servicing, or maintenance while energized.