On this page
The working space numbers
The three core dimensions come from NEC 110.26(A). Width is at least 30 inches, or the width of the equipment if it is wider, and it does not have to be centered on the panel as long as the door opens fully. Depth is at least 36 inches measured straight out from the live parts or the enclosure face. Height of the working space is at least 78 inches from the floor.
On top of those clearances, 110.26(E) reserves the dedicated space: the footprint of the panel extended from the floor to 6 feet above the equipment (or to a structural ceiling) is reserved for electrical equipment, with no plumbing, ducts, or foreign systems passing through it. That is why an inspector objects to a water line run just above a panel.
- ·Width: 30 inches minimum (or equipment width)
- ·Depth: 36 inches from the panel face
- ·Headroom: 78 inches minimum
- ·Door must open at least 90 degrees
- ·Dedicated space above the panel kept clear of foreign systems
Where a panel may not go
Can a panel be in a closet? Not a clothes closet. The code prohibits overcurrent devices in the easily ignitable surroundings of a clothes closet, so a panel in a coat or bedroom wardrobe closet is a classic violation. A panel in a utility or mechanical closet can be acceptable if the full 110.26 working space stays clear and nothing stored blocks it.
Panels are also prohibited in bathrooms in dwellings, and the working space cannot sit over steps of a stairway. Bedroom code is the common surprise: a panel inside a bedroom is generally allowed, but a panel in a bedroom closet is not, because that closet is a clothes closet.
- ·Prohibited: clothes closets
- ·Prohibited: bathrooms in dwellings
- ·Prohibited: working space over steps
- ·Allowed in a bedroom itself, not in its clothes closet
Grandfathering vs new work
An older panel installed legally under a prior code is often grandfathered where it stands, and a homeowner is generally not forced to relocate it just because the rule tightened. The grandfathering ends the moment you do new work: replace the panel, upgrade the service, or finish a space around it, and the current 110.26 clearances apply to that work.
This is why a finished basement project or a 200-amp service upgrade can trigger a relocation that a routine repair would not. The same panel that was fine for decades can require 36 inches of cleared depth the day a permit is pulled to replace it.
Why inspectors flag blocked panels
The working space exists so someone can stand in front of a live panel, fully open the door, and work or shut off power without reaching across hazards or backing into something. Shelving, a furnace, a stored bicycle, or boxes inside that 30-by-36-inch footprint defeat the purpose, so inspectors flag them even when the wiring itself is correct.
If a panel sits in a prohibited location or cannot hold its clearances, a licensed electrician can relocate it or rework the surrounding space to bring it into compliance, which is commonly bundled into a service upgrade or a finished-room permit. The cost to move an electrical panel depends heavily on how far the relocation runs, and adding capacity in a remote area can sometimes be solved with a subpanel instead of moving the main. Keeping the area in front of the panel clear day to day is the simplest way to stay on the right side of the rule.
Rather talk it through with a pro?
Calls are answered around the clock and routed to a licensed electrical pro serving your area.