The NEC doesn't specify a specific distance between the top of the panelboard and the finished ceiling of an electrical room. Instead, it focuses on working clearances and dedicated equipment space. Here's a breakdown: 110.26(A)(3) Height of Working Space

This section states the working space required by 110.26(A) shall be clear and extend from the grade, floor, or platform to the height required by 110.26(E). In no case shall the height be less than 6 1/2 feet

110.26(E) Dedicated Equipment Space. (1) Indoor. Indoor electrical equipment shall be located in dedicated spaces for electrical equipment. This space shall not be dedicated for electrical installations, cables, raceways, and nonelectrical equipment and shall comply with 110.26(E)(1)(a) through (d). (a) Dedicated Electrical Space. The space equal to the width and depth of the equipment and extending from the floor to a height of 1.8 m (6 ft) above the equipment or to the structural ceiling, whichever is lower, shall be dedicated to the electrical installation. No piping, ducts, leak protection apparatus, or other equipment foreign to the electrical installation as described in this section shall be located in this zone.

In Summary

While the NEC doesn't give a top-of-panel-to-ceiling clearance dimension, you must have clear dedicated space to a height of 6 feet above the equipment or the structural ceiling, whichever is lower.

Important Considerations



Local Amendments

Always check with your local electrical inspector for any local amendments to the NEC. Local jurisdictions may have more restrictive requirements.

Specific Equipment

Panelboards may have manufacturer instructions that require more clearance.

Accessibility: Always ensure adequate space for maintenance, repairs, and future expansion. Don't just meet the minimum code; consider usability. Flag for review