Working-Space Clearance Lookup (NEC 110.26)
Returns the NEC 110.26(A) working space in front of electrical equipment: the depth by voltage-to-ground and Condition 1/2/3 (0-150 V is 3 ft; 151-600 V is 3 / 3.5 / 4 ft), the width as the greater of 30 in or the equipment width, and 6.5 ft of headroom with a required 90-degree door swing. 110.26(E) adds the dedicated equipment space. A reference lookup; the AHJ governs.
Formula and source
depth from Table 110.26(A)(1) by nominal voltage to ground and Condition 1/2/3 (0-150 V: 3/3/3 ft; 151-600 V: 3/3.5/4 ft); width = max(30 in, equipment width); headroom = 6.5 ft, with a 90-degree door swing.
Working space about electrical equipment, NEC 2023 110.26(A), and dedicated equipment space 110.26(E), by name.
Audience
This tile is built for electricians and the adjacent professions in the Electrical group. The interactive calculator runs entirely in your browser. No account, no fee, no advertising, no tracking.
Related tools
Posture
Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.